SeaMonkey Changelog

What's new in SeaMonkey 2.53.18.2

Mar 28, 2024

SeaMonkey 2.53.18.2 contains (among other changes) the following changes relative to SeaMonkey 2.53.18.1:
Block set-cookie from multipart/x-mixed-replace with pref bug 1864385.
Check if WorkerRunnable::Run runs on top of WorkerThreadPrimaryRunnable::Run in a worker thread bug 1867982.
Process pairs in coord list in PolyArea bug 1878211.
Cherry-pick update to dav1d bug 1881093.
Land NSS NSS_3_90_2_RTM UPGRADE_NSS_RELEASE bug 1880562.
Fix DSN for send later bug 815638.
Catch webNavigation error during tab restore bug 1885748.
SeaMonkey 2.53.18.2 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When History is invoked, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.18.2 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.18.2 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.8.0 release notes for specific security fixes in this release.
Additional important security fixes up to Current Firefox 115.9 and Thunderbird 115.9 ESR plus many enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.
SeaMonkey-specific changes
SeaMonkey now uses gtk3 on Linux. If you experience a problem because of this please file a bug. Please try another OS theme first. Some of them are buggy and cause problems with SeaMonkey, Thunderbird and Firefox.

New in SeaMonkey 2.53.18.1 (Jan 17, 2024)

New in SeaMonkey 2.53.18 (Jan 17, 2024)

New in SeaMonkey 2.53.17.1 (Dec 8, 2023)

New in SeaMonkey 2.53.17 Beta 1 (Jun 20, 2023)

SeaMonkey 2.53.17 contains (among other changes) the following major changes relative to SeaMonkey 2.53.16:
Fix macOS Contacts permission request bug 1826719.
Remove SeaMonkey 2.57 links from debugQA bug 1829683.
Treat opening urls from the library as external bug 1619108.
Disable spam warning for autogenerated links in plaintext messages bug 619031.
Switch SeaMonkey build files to Python 3 bug 1635849.
Remove empty overlays from Composer bug 1828533.
Move xpfe autocomplete to comm-central suite bug 1418512.
Remove nsIPrefBranch2 and nsIPrefBranchInternal bug 1374847.
Continue the switch from Python 2 to Python 3 in the build system.
SeaMonkey 2.53.17 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When History is invoked, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.17 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.17 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.8.0 release notes for specific security fixes in this release.
Additional important security fixes up to Current Firefox 102.11 and Thunderbird 102.11 ESR plus many enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.

New in SeaMonkey 2.53.16 Beta 1 (Mar 1, 2023)

New in SeaMonkey 2.53.15 (Jan 20, 2023)

SeaMonkey 2.53.15 contains (among other changes) the following major changes relative to SeaMonkey 2.53.14:
Microtasks and promises bug 1193394.
Implement queueMicrotask()bug 1480236.
Remove old synchronous contentPrefService from the tree bug 886907 and bug 1392929.
Remove remaining uses of 'general.useragent.locale' bug 1410736 and bug 1410738.
Migrate to intl.locale.requested.locale list from 'general.useragent.locale' bug 1441016.
Introduce a pref to store BCP47 locale list bug 1414390, bug 1423532 and bug 1441026.
Remove synchronous certificate verification APIs from nsIX509CertDB bug 1453741 and bug 1453778.
Taskbar preview's favicon appears blank bug 1475524.
Call Imagelibs decodeImageAsyncWindows using a callback bug 1790695.
Remove PermissionsService from process Windows sandboxing code bug 1788233, bug 1789782 and bug 1794394.
Security info dialog doesn't show cert status anymore bug 1293378.
Replace nsIPlatfromCharset in mailnews bug 1381762.
Replace use of nsMsgI18NFileSystemCharset() with NS_CopyUnicodeToNative/NS_CopyNativeToUnicode() bug 1506422.
Cater for Outlook's/Hotmail's 'Deleted' folder bug 1320191.
Make some filter methods scriptable bug 1497513.
Fix crash in nsMsgFilterAfterTheFact::ApplyFilter() caused by async reset of 'm_curFolder' bug 537017.
Localize messages from nsIMsgFolder.logRuleHitFail() bug 1352731.
Add logging of message filter runs and actions bug 697522.
Check that we got a non-null header before running a filter on it (and crashing) bug 1563959.
With CONDSTORE, eliminate unneeded flag fetches at startup bug 1428097.
Fix so custom tags (keywords) are visible to all users bug 583677.
Improve handling of tags on shared folders bug 1596371.
Allow setting/resetting junk marking by user for yahoo/aol to stick bug 1260059.
Don't check subject if spellchecker is not ready bug 1069787.
Grammar issues in mailnews_account_settings.xhtml bug 1793291.
Remove use of nsIMemory bug 1792578.
Replace obsolete GetStringBundleService call in SeaMonkey bug 1794400.
SeaMonkey crashes on macOS Ventura 13.0 bug 1797696.
Website Navigation Bar has stopped working bug 1803918.
SeaMonkey switch to fullscreen does not work on macOS Ventura 13.0 bug 1804537.
Continue the switch from Python 2 to Python 3 in the build system.
Added support for clang 15 and macOS SDK 11.3.
Verified compatibility with Rust 1.65.

New in SeaMonkey 2.53.15 Beta 1 (Dec 8, 2022)

New in SeaMonkey 2.53.14 (Sep 29, 2022)

SeaMonkey 2.53.14 contains (among other changes) the following major changes relative to SeaMonkey 2.53.13:
Updates to the following DOM HTML element interfaces: Embed, Object, Anchor, Area, Button, Frame, Canvas, IFrame, Link, Image, MenuItem, TextArea, Source, Select, Option, Script and Html. Please test add-ons.
Continue the switch from Python 2 to Python 3 in the build system.
Add ESR 102 links to debugQA bug 1779028.
Remove about plugins from help menu bug 1779031.
Remove url whitelist from SeaMonkey bug 1779037.
Dead links in cs_nav_prefs_advanced.xhtml [en-US] bug 1783558.
Dead links in cs_nav_prefs_advanced.xhtml bug 1786030.
Remove obsolete chat services from SeaMonkey address book bug 1779034.
Address Book: "Get Map" button is not shown for home addresses bug 1779319.
Added compatibility for rust 1.63
SeaMonkey 2.53.14 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When History is invoked, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".

New in SeaMonkey 2.53.14 Beta 1 (Aug 31, 2022)

SeaMonkey 2.53.14 contains (among other changes) the following major changes relative to SeaMonkey 2.53.13:
Updates to the following DOM HTML element interfaces: Embed, Object, Anchor, Area, Button, Frame, Canvas, IFrame, Link, Image, MenuItem, TextArea, Source, Select, Option, Script and Html. Please test add-ons.
Continue the switch from Python 2 to Python 3 in the build system.
Add ESR 102 links to debugQA bug 1779028.
Remove about plugins from help menu bug 1779031.
Dead links in cs_nav_prefs_advanced.xhtml [en-US] bug 1783558.
Dead links in cs_nav_prefs_advanced.xhtml bug 1786030.
Remove obsolete chat services from SeaMonkey address book bug 1779034.
Address Book: "Get Map" button is not shown for home addresses bug 1779319.
Added compatibility for rust 1.63
SeaMonkey 2.53.14 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When History is invoked, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.14 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.14 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.8.0 release notes for specific security fixes in this release.
Additional important security fixes up to Current Firefox 91.11 and Thunderbird 91.11 ESR plus many enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.
SeaMonkey-specific changes:
SeaMonkey now uses gtk3 on Linux. If you experience a problem because of this please file a bug and link it to bug 1367257. Please try another OS theme first. Some of them are buggy and cause problems with SeaMonkey, Thunderbird and Firefox.

New in SeaMonkey 2.53.13 (Jul 11, 2022)

New in SeaMonkey 2.53.13 Beta 1 (Jun 16, 2022)

New in SeaMonkey 2.53.12 (May 4, 2022)

New in SeaMonkey 2.53.11.1 (Mar 25, 2022)

New in SeaMonkey 2.53.11 (Mar 2, 2022)

New in SeaMonkey 2.53.10.2 (Dec 28, 2021)

New in SeaMonkey 2.53.10.1 (Dec 13, 2021)

New in SeaMonkey 2.53.10 (Nov 16, 2021)

Minor fixes for testdisplay command in ChatZilla bug 1727976.
Show CTCP requests (excluding ACTION and DCC) bug 1722156.
IRCv3: Add support for server-time bug 1724586.
Add localization note for network editor dialog width in ChatZilla bug 1727977.
IRCv3: Add support for extended-join and account-notify bug 1722159.
Add ability to collapse message groups in ChatZilla bug 1724588.
Fix JS strict warnings in unescapeTagValue in ChatZilla bug 1727989.
IRCv3: Add support for invite-notify bug 1722161.
IRCv3: Add support for batch bug 1724589.
Fix JS strict warning in addHistory in cZ static.js bug 1727992.
IRCv3: Add support for cap-notify bug 1722162.
Stop using canonical name as collection keys in ChatZilla bug 1728025.
IRCv3: Add support for TLS and STS bug 1722166.
Helper function for renaming irc server properties in ChatZilla bug 1728027.
IRCv3: Add support for MONITOR bug 1722174.
Remove use of msg.commasp in ChatZilla bug 1726965.
Allow shiftKey to modify behaviour of link clicking in cZ bug 1713458.
IRCv3: Add support for echo-message bug 1722211.
In ChatZilla make /commands return all matches starting with pattern bug 1726966.
Use SeaMonkey prefs to determine how links behave in cZ bug 1713467.
Allow parameters to be localised in ChatZilla bug 1724105.
Add identify command to cZ and hook into password management bug 1713470.
IRCv3.1: Implement SASL with PLAIN mechanism bug 1717545.
IRCv3: Add support for message tags bug 1724584.
Add last read message divider to ChatZilla bug 1729159.
IRCv3: Add support for account-tag bug 1724585.
Missing option "text encoding Unicode/UTF-8" in preferences - Mailnews bug 1679260.
Detect Crashreporter using AppConstants in SeaMonkey bug 1735236.
Link about LEGACY extensions in Add-ons Manager is broken bug 1656797.
Update help for clear private data preferences and dialog bug 1728911.
Fix typo in cs_nav_prefs_appearance bug 1737473.
Drop leftover "Edit Menu" comment from messageWindow.xul and addressbook.xul bug 1725121.
Add dummy tab routines to SeaMonkey mailnews tab browser bug 1735243.
Folder pane and tab/window title not updated correctly when opening in new tab bug 1726940.
Allow mail tab bar to be controlled separately to browser tab bar bug 1724515.
Copy any user set values for new mail.tabs prefs bug 1729165.
Merge Master Passwords and Passwords pref panes into a single pref pane bug 1728099.
Move warning about redirection pref from Content to Privacy & Security pane bug 1728185.
Move website icons prefs from content pref pane to browser pref pane bug 1727425.
Move browser / mailnews system integration prefs into advanced pane bug 1727659.
Have separate opentabfor.middleclick for mailnews bug 1727948.
Add removeBrowser helper for tabbrowser bug 1730391.
Put <browser> in a <stack> so it's easy to overlay bug 1730392.
Allow browser focus to be avoided bug 1720003.
SeaMonkey 32x32 default icon has light stripe at the bottom bug 1729153.
Support <input type=time> and <input type=date> in SeaMonkey bug 1730408.
Middleclick on browser tab handled twice (closes tab and loads URL from primary or clipboard) bug 1734407.
Unable to create a new "Saved Search Folder" using "Save View as a Folder..." bug 1738669.
The following bugs were fixed in our branch of the Gecko source code only:
Enable compression for standard http connections bug 1728996.
Support VS2022 for compiling under Windows bug 1728988.
SeaMonkey 2.53.10 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.10 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.10 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.0 release notes for specific changes and security fixes in this release.
Additional important security fixes up to Current Firefox 78.15 ESR and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.

New in SeaMonkey 2.53.10 Beta 1 (Oct 29, 2021)

EaMonkey 2.53.10 contains (among other changes) the following major changes relative to SeaMonkey 2.53.9.1:
Minor fixes for testdisplay command in ChatZilla bug 1727976.
Show CTCP requests (excluding ACTION and DCC) bug 1722156.
IRCv3: Add support for server-time bug 1724586.
Add localization note for network editor dialog width in ChatZilla bug 1727977.
IRCv3: Add support for extended-join and account-notify bug 1722159.
Add ability to collapse message groups in ChatZilla bug 1724588.
Fix JS strict warnings in unescapeTagValue in ChatZilla bug 1727989.
IRCv3: Add support for invite-notify bug 1722161.
IRCv3: Add support for batch bug 1724589.
Fix JS strict warning in addHistory in cZ static.js bug 1727992.
IRCv3: Add support for cap-notify bug 1722162.
Stop using canonical name as collection keys in ChatZilla bug 1728025.
IRCv3: Add support for TLS and STS bug 1722166.
helper function for renaming irc server properties in ChatZilla bug 1728027.
IRCv3: Add support for MONITOR bug 1722174.
Remove use of msg.commasp in ChatZilla bug 1726965.
Allow shiftKey to modify behaviour of link clicking in cZ bug 1713458.
IRCv3: Add support for echo-message bug 1722211.
In ChatZilla make /commands return all matches starting with pattern bug 1726966.
Use SeaMonkey prefs to determine how links behave in cZ bug 1713467.
Allow parameters to be localised in ChatZilla bug 1724105.
Add identify command to cZ and hook into password management bug 1713470.
IRCv3.1: Implement SASL with PLAIN mechanism bug 1717545.
IRCv3: Add support for message tags bug 1724584.
Add last read message divider to ChatZilla bug 1729159.
IRCv3: Add support for account-tag bug 1724585.
Missing option "text encoding Unicode/UTF-8" in preferences - Mailnews bug 1679260.
Detect Crashreporter using AppConstants in SeaMonkey bug 1735236.
Link about LEGACY extensions in Add-ons Manager is broken bug 1656797.
Update help for clear private data preferences and dialog bug 1728911.
Fix typo in cs_nav_prefs_appearance bug 1737473.
Drop leftover "Edit Menu" comment from messageWindow.xul and addressbook.xul bug 1725121.
Add dummy tab routines to SeaMonkey mailnews tab browser bug 1735243.
Folder pane and tab/window title not updated correctly when opening in new tab bug 1726940.
Allow mail tab bar to be controlled separately to browser tab bar bug 1724515.
Copy any user set values for new mail.tabs prefs bug 1729165.
Merge Master Passwords and Passwords pref panes into a single pref pane bug 1728099.
Move warning about redirection pref from Content to Privacy & Security pane bug 1728185.
Move website icons prefs from content pref pane to browser pref pane bug 1727425.
Move browser / mailnews system integration prefs into advanced pane bug 1727659.
Have separate opentabfor.middleclick for mailnews bug 1727948.
Add removeBrowser helper for tabbrowser bug 1730391.
Put in a so it's easy to overlay bug 1730392.
Allow browser focus to be avoided bug 1720003.
Seamonkey 32x32 default icon has light stripe at the bottom bug 1729153.
Support and in SeaMonkey bug 1730408.
middleclick on browser tab handled twice (closes tab and loads URL from primary or clipboard) bug 1734407.

New in SeaMonkey 2.53.9.1 (Sep 28, 2021)

New in SeaMonkey 2.53.9 (Aug 26, 2021)

New in SeaMonkey 2.53.9 Beta 1 (Aug 11, 2021)

SeaMonkey 2.53.9 contains (among other changes) the following major changes relative to SeaMonkey 2.53.8.1:
There is now an option to clear browser history during shutdown bug 1621445.
Uninstall plugin command for ChatZilla bug 541719.
Update icons used in ChatZilla status bar bug 1710238 and bug 1710249.
Make ChatZilla understand mIRC color code 99 bug 1710298.
Implement IRCv3 basic CAP negotiation bug 1717539 and CAP LIST and update CAP ACK and CAP LS bug 1710313.
Use Unicode instead of images for emojis in ChatZilla bug 1711375 and add some extra emojis bug 1711376.
Use SeaMonkey's configured web search rather than a separate one in ChatZilla bug 1712498.
Add a networks editor to ChatZilla bug 1716232.
Implement IRCv3 away-notify bug 1717543, chghost and userhost-in-names bug 1717544, self-messaging bug 1722212 and WHOX bug 1722214.
Link to SeaMonkey website in debugQA for verification sites and development section bug 1685606.
Send button should be disable until we have a recipient bug 104973.
Remove need to use a modifier for marking messages as unread bug 1719216.
SeaMonkey 2.53.9 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.9 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.9 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.0 release notes for specific changes and security fixes in this release.
Additional important security fixes up to Current Firefox 78.13 ESR and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.
SeaMonkey-specific changes:
SeaMonkey now uses gtk3 on Linux. If you experience a problem because of this please file a bug and link it to bug 1367257. Please try another OS theme first. Some of them are buggy and cause problems with SeaMonkey, Thunderbird and Firefox.

New in SeaMonkey 2.53.8.1 (Jul 22, 2021)

SeaMonkey 2.53.8.1 contains (among other changes) the following major changes relative to SeaMonkey 2.53.8:
Archive message action does not work bug 1718839.
Do not preserve offlineMsgSize parameter when moving/copying emails between folders bug 1720202 and bug 1430480.
Move thread code to threadPane.js and remove messengerdnd.js bug 515675.
SeaMonkey 2.53.8.1 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.8.1 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.8.1 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.0 release notes for specific changes and security fixes in this release.
Additional important security fixes up to Current Firefox 78.12 ESR and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.

New in SeaMonkey 2.53.8 Beta (Jun 30, 2021)

SeaMonkey 2.53.8 contains (among other changes) the following major changes relative to SeaMonkey 2.53.7.1:
Serious performance improvements and bug fixes tracked in bug 1633339 and bug 1711050.
Language attributes with country codes not recognized when building the Website Navigation Bar link toolbar bug 134436 and bug 1709443.
Optimize SeaMonkey icons for speed and optional higher quality for branding bug 1362210 and bug 1699322.
Support from= option when opening email compose window from the command line bug 1628671.
Update subject handling and GenericSendMessage function in compose window bug 1693994.
All message windows should update when view preferences are changed bug 1694765.
Improve marking of multiple messages as read / unread bug 1700530.
Show version numbers again in the add-on manager by the partial backout of bug 1161183.
Update available networks in chatZilla bug 1704392 and bug 1712505.
Change default port for IRC via TLS/SSL to 6697 bug 1704280.
Remove chatZilla and Lightning extension language packs and incorpate localisations within the main language pack bug 1604663.
Fix address drag and drop handling in compose window bug 1712002 and bug 1712227.
Further fixes for legacy generators and the deprecated for each statement in add-ons and the Add-on SDK bug 1702903.
For developers, fork DOMi repo into main SeaMonkey one which means no need to separately checkout the extension bug 1700003.
SeaMonkey 2.53.8 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.8 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.8 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.0 release notes for specific changes and security fixes in this release.
Additional important security fixes up to Current Firefox 78.11 ESR and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.

New in SeaMonkey 2.53.7.1 (Apr 15, 2021)

SeaMonkey 2.53.7.1 contains (among other changes) the following major changes relative to SeaMonkey 2.53.7:
Fix for legacy generators and the deprecated for each statement in add-ons and the Add-on SDK bug 1702903.
Fix for handling of dead keys in text input fields in GTK 3.24.26+ bug 1701288.
SeaMonkey 2.53.7.1 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
Support for all NPAPI plugins like Flash, Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.7.1 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.7.1 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.0 release notes for specific changes and security fixes in this release.
Additional important security fixes up to Current Firefox 78.8 ESR and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.
SeaMonkey-specific changes
SeaMonkey now uses gtk3 on Linux. If you experience a problem because of this please file a bug and link it to bug 1367257. Please try another OS theme first. Some of them are buggy and cause problems with SeaMonkey, Thunderbird and Firefox.

New in SeaMonkey 2.53.7 (Mar 30, 2021)

New in SeaMonkey 2.53.6 (Jan 22, 2021)

New in SeaMonkey 2.53.5.1 (Nov 19, 2020)

New in SeaMonkey 2.53.5 (Nov 15, 2020)

This version makes changes to your profile that can't be reverted in case you want to go back to a previous version of SeaMonkey. You MUST absolutely do a full backup of your profile before trying SeaMonkey 2.53.5.
SeaMonkey 2.53.5 contains (among other changes) the following major changes relative to SeaMonkey 2.53.4:
Provide WebP support bug 1653869.
Add startpage.com as a search engine available to all locales bug 1655283.
Added av1 support.
Included latest version of freetype2.
Added support for the resizeObserver web API.
Support for rust 1.47.0 on Linux and macOS platforms.
Dropped support for use of system sqlite.
Various security and general platform fixes.
SeaMonkey 2.53.5 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
The only NPAPI plugin which will work with SeaMonkey 2.53.5 is Flash. Support for other NPAPI plugins like Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.5 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.5 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.0 release notes for specific changes and security fixes in this release.
Additional important security fixes up to Current Firefox 78.4 ESR and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.

New in SeaMonkey 2.53.5 Beta 1 (Oct 28, 2020)

SeaMonkey 2.53.5 contains (among other changes) the following major changes relative to SeaMonkey 2.53.4:
Provide WebP support bug 1653869.
Add startpage.com as a search engine available to all locales bug 1655283.
Added av1 support.
Included latest version of freetype2.
Added support for the resizeObserver web API.
Dropped support for use of system sqlite.
Various security and general platform fixes.
SeaMonkey 2.53.5 contains (among other changes) the following major changes relative to SeaMonkey 2.49.5:
The Bookmarks Manager has switched its name to Library, and now also includes the History list. When invoking History, the Library will be shown with the History list selected. The extensive modifications were needed because of Mozilla Gecko platform API changes.
Download Manager has been migrated to a new API. Although it looks pretty much the same as before, the search option is missing and some other minor details work differently. The previous downloads history is removed during the upgrade.
The layout panel was added to the CSS Grid tools.
TLS 1.3 is the default SSL version now.
The only NPAPI plugin which will work with SeaMonkey 2.53.5 is Flash. Support for other NPAPI plugins like Java and Silverlight has been removed. For displaying pdf files in the browser you can use pdf.js-seamonkey from Isaac Schemm.
SeaMonkey now uses a new api for formatting regional data like time and date. Default is to use the application locale of the current SeaMonkey build. If you use a language pack or a different OS formatting this is usually not desired. You can change the formatting from the application locale to the regional settings locale (OS) in the preferences dialog under "Appearance".
SeaMonkey 2.53.5 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
SeaMonkey 2.53.5 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 60.0 release notes for specific changes and security fixes in this release.
Additional important security fixes up to Current Firefox 78.4 ESR and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53.x beta and release versions as fast as we are able to.
SeaMonkey-specific changes
SeaMonkey now uses gtk3 on Linux. If you experience a problem because of this please file a bug and link it to bug 1367257. Please try another OS theme first. Some of them are buggy and cause problems with SeaMonkey, Thunderbird and Firefox.

New in SeaMonkey 2.53.4 (Sep 22, 2020)

New in SeaMonkey 2.53.4 Beta 1 (Aug 20, 2020)

New in SeaMonkey 2.53.1 (Feb 28, 2020)

New in SeaMonkey 2.48b1 Beta (Jul 20, 2017)

New in SeaMonkey 2.46 (Mar 16, 2017)

New in SeaMonkey 2.39 (Nov 9, 2015)

New in SeaMonkey 2.38 (Sep 27, 2015)

SeaMonkey 2.38 will no longer offer to migrate your data from SeaMonkey 1.x or Mozilla 1.x at the first start after installation (bug 689437). In order to upgrade from such an old version, install the last SeaMonkey 2.0 release first, do the one-time profile upgrade, uninstall SeaMonkey 2.0 and then install your target release (e.g. this one).
You can find more details about installation, profile data and uninstallation in our install and uninstall document.
Extensions (Add-ons) and Themes:
Extensions installed under SeaMonkey 1.x are not migrated to SeaMonkey 2, and may not be compatible for reinstalling in this version due to major changes in our architecture. Please report any issues to the maintainer of the extension. Extensions and Themes for SeaMonkey 2.38 can be installed from the SeaMonkey Add-Ons website or the "Get Add-Ons" section in the Add-ons Manager.
Extensions with binary components such as Lightning, Enigmail and HTML Validator only work on certain platforms (e.g. Windows). Furthermore they need to be adjusted for each new SeaMonkey release, which also means that an old version of such an add-on can break SeaMonkey if you disabled compatibility checking (which e.g. happens when you install the Add-on Compatibility Reporter add-on).
For Lightning, please check the Stable Releases section on the Calendar Versions page. Alternatively check the Lightning add-on page (Development Channel at the bottom of the page).
For Enigmail, please refer to the Enigmail Nightly Builds page.
For HTML Validator you need to check whether the Firefox version that appears on SeaMonkey's about: page is listed on the 0.9x download page. Note that only Windows is supported at this time.
SeaMonkey 2.29 dropped support for the legacy JavaScript Debugger interface (JSD1). Hence add-ons that relied on it, like the JavaScript Debugger (Venkman) that came bundled with SeaMonkey, or Firebug 1.x, have stopped working. While Venkman has been discontinued, Firebug can simply be upgraded to a more recent version (2.x) which supports the new JSD2 interface. If you are searching for a Venkman replacement (especially for debugging SeaMonkey itself or add-ons), have a look at the Tiny JavaScript Debugger add-on.

New in SeaMonkey 2.38b1 Beta (Sep 8, 2015)

New in SeaMonkey 2.33.1 (Mar 23, 2015)

New in SeaMonkey 2.33 (Mar 11, 2015)

New in SeaMonkey 2.32.1 (Feb 7, 2015)

New in SeaMonkey 2.32 (Jan 14, 2015)

New in SeaMonkey 2.31b1 Beta (Nov 3, 2014)

New in SeaMonkey 2.30 (Oct 16, 2014)

New in SeaMonkey 2.29 (Sep 8, 2014)

SeaMonkey-specific changes:
URLs that are too long to be shown completely appear in a tooltip now when hovering the location bar.
Coloring of the location bar for HTTPS URLs can be disabled through Preferences now.
Certain search engines can be discovered automatically now.
The status bar padlock icon features a context menu now.
You can now insert formulas in Composer using a dialog (LaTeX to MathML).
Feed items can be tagged automatically according to feed category tags now.
Searching within a message compose window will now display the find toolbar.
The account name is now shown in the status bar when downloading messages from POP servers.
Localizability of custom reply headers has been improved (mailnews.reply_header_* preferences).
Contact autocompletion in message composition windows now searches for all terms separately (AND search).
You can now search for contacts containing parentheses.
See the changes page for a more complete overview.
Mozilla platform changes:
HTTP caching (v2) has been enabled.
Generational garbage collection has been integrated.
Public key pinning support has been enabled.
The number of found items is now displayed in the find toolbar.
The trust bit for some 1024-bit root certificates has been removed / turned off.
Support for the Prefer:Safe HTTP header for parental control has been added.
mozilla::pkix has been added as default certificate verifier.
The CAPS infrastructure for specifying site-specific permissions (via capability.policy.* preferences) has been removed.
WebVTT has been implemented.
CSS3 variables have been implemented.
CSP 1.1 nonce-source and hash-source have been enabled.
With the exception of those bundled inside an extension or ones that are whitelisted, plugins are no longer activated by default.
Added support for GStreamer 1.0 (see bug 806917 for build configuration).
Disabled insecure NTLM (pre-NTLMv2) authentication (see bug 828183).
Passwords can now be saved via the password manager even when autocomplete="off" was used to prevent it (see bug 956906).
Also see Firefox 32 for Developers, Firefox 31 for Developers and Firefox 30 for Developers.
Fixed several stability issues

New in SeaMonkey 2.29b1 Beta (Aug 27, 2014)

New in SeaMonkey 2.26 (May 3, 2014)

New in SeaMonkey 2.26b1 Beta (Apr 10, 2014)

New in SeaMonkey 2.25 (Mar 20, 2014)

New in SeaMonkey 2.25b3 Beta (Mar 15, 2014)

New in SeaMonkey 2.25b2 Beta (Mar 10, 2014)

New in SeaMonkey 2.24 (Feb 6, 2014)

New in SeaMonkey 2.24b1 Beta (Feb 6, 2014)

Features:
The DoNotTrack and Prompt on Sanitize preferences are now kept in sync (bug 939481).
A pref (mailnews.p7m_external) has been added to allow users to choose an alternate application/pkcs7-mime handling (bug 243833).
Support for Atom Threading Extensions (RFC 4685) has been added (bug 761656).
Migrating profiles from Thunderbird supports the new signons file format now (support for the old format has been dropped) (bug 925803).
Autocomplete drop-downs (e.g. used on the Location Bar and Open Location dialog) now show favicons for their entries (bug 906920).
The account name is now displayed in the status bar for all messages when checking mail (bug 224436).
IMAP alert messages now show the server of the corresponding mail account (bug 214854).
Newsgroup names are now searched for all search strings combined (AND-search) on the subscribe dialog (bug 99019).
Fixes:
The return receipt request prompt had stopped appearing (bug 955830).
The value of the "Messages more than x days old" checkbox in Synchronization settings of News accounts is now saved correctly (bug 941914).
The MailNews context menu showed all possible options when only feed accounts were set up (bug 949921).
The Account Manager can be used again even if Local Directory is deemed unsafe (bug 921371).
The list of feeds is now ignored, fixing the output of "(no subject)" articles while parsing the RSS of Planet Python (bug 476641).
Interfering with the restoring of a tab session could lead to an incomplete session getting saved (bug 919668).
HTML + plain-text (multipart) email messages with wrong encoding are now upgraded to UTF-8 properly (bug 302748).
The Folder Properties labels for incoming mail character encoding have been changed from "Default" to "Fallback" (bug 916823).
Help has been updated for the changes to SSL warnings and new options for the mixed content blocker on the SSL Preference pane (bug 904189).
Default Character Encoding has been renamed to Fallback Character Encoding (together with a note) on the Mail & Newsgroups Character Encoding Preferences pane (bug 902131).
The S/MIME Content-Description mail header could be invalid due to non-encoded 8-bit data (bug 723086).
Non-email feed author values were put in angle brackets, which could cause display issues in certain cases (bug 682117).

New in SeaMonkey 2.23 (Dec 13, 2013)

New in SeaMonkey 2.23b2 Beta (Dec 9, 2013)

New in SeaMonkey 2.23b1 Beta (Dec 9, 2013)

New in SeaMonkey 2.22 (Oct 30, 2013)

New in SeaMonkey 2.22b2 Beta (Oct 30, 2013)

New in SeaMonkey 2.21 (Sep 18, 2013)

New in SeaMonkey 2.21b2 Beta (Sep 18, 2013)

New in SeaMonkey 2.21b1 Beta (Sep 18, 2013)

Features:
Allow deletion of news posts by default, with a prompt (new pref news.warn_on_delete replaces news.allow_delete_with_no_undo) (Bug 883485).
Implement optional taskbar preview-per-tab (pref: browser.taskbar.previews.enable) (Bug 839891).
Implement permission prompt for desktop notifications (Bug 870413).
Add Isn't operator for searching by Priority (Bug 870282).
Fixes:
Add Windows 8.1 support to seamonkey.exe.manifest (Bug 893102).
Fix what preference "Activate all plugins by default" in the Preferences window sets, activate click-to-play UI by default in about:addons (Bug 901749).
Implement multiple plugin doorhanger UI (Mac part) (Bug 798278).
Ensure attachment names are escaped (Bug 900552).
Change keyboard shortcut and correct typo in Help for Private Browsing feature (Bug 897233).
Remove Help page for Validation preference pane and update sections mentioning CRL management (Bug 892060).
Fix recycled compose window issues (unable to compose a reply, unable to turn inline spellchecking back on) (Bug 880595).
Copy settings from the default mail account if one exists (Bug 437139).
Clear Namespace text fields in IMAP advanced settings properly when switching accounts in the account manager (Bug 881694).
Remove Manage CRLs button from Preferences (Bug 886099).
Fix passwords not saving or autofilling (Bug 886990).
Fix the compose window spell check dialog (Bug 880595).
Do not create unnecessary default mail folders in root folder or Movemail account (Bug 97943).
Update the SSL preference pane for TLS 1.2 (Bug 884449).
Fix busy cursor in thread and folder pane while reading news with ui.use_activity_cursor = true (Bug 727414).
Run all plugins OOP by default on Mac OS X when in 32-bit mode (i386/x86) (Bug 883203).
Fix navigation toolbar problems in small-icons mode (toolbar and throbber background) (Bug 882178).
Do not store empty message for empty feed (Bug 883527).
Disable Recent menu in the folder picker if it contains no items (Bug 876347).
Allow to add feeds when offline and do not get new RSS messages while offline (Bug 254132).
Make Recipient column for messages with no recipients show blank (Bug 187798).
Remove prefs mail.account.accountX.identities and mail.account.accountX.server when an account is deleted (Bug 875675).
Do not prompt twice when we cannot save a draft message (Bug 724522).
Do not show the current account in the folder picker as a target for deferring in the Advanced dialog (Bug 389139).
Do not issue Subscribe to feed cancel confirmation dialog after parent window is closed (Bug 349049).
Search newest messages first (Bug 474730).
Add proper port number checking in the Account manager (Bug 810680).
Document the new Private Browsing feature in Help (Bug 872000).
Make search suggestions work with new search sidebar (Bug 595235).
Use RSS Atom published date instead of updated if the latter is empty (Bug 876790).
Properly save archive settings made for individual identities (Bug 871326).
Fix news message autosave while editing the Newsgroup header (Bug 832760).
Fix support for feed URLs containing a pipe character (Bug 562227).
Change order of priority list in filter search (Bug 174437).
Show the correct news server in the unsubscribe alert if news server has been changed (Bug 163869).
Fix display of messages containing accented characters if order of in email is reversed (Bug 594646).
Update Help for Mail & News Message Display preference pane (Bug 868419).
Tweak Last-Modified date for new feed subscribe (Bug 873754).
Make new message import from Movemail more robust and fail cleanly if the file cannot be parsed (Bug 856577).

New in SeaMonkey 2.20 (Aug 8, 2013)

New in SeaMonkey 2.20b3 Beta (Aug 8, 2013)

New in SeaMonkey 2.20b2 Beta (Jul 24, 2013)

New in SeaMonkey 2.20b1 Beta (Jul 24, 2013)

Features in Beta 1:
The Content Security Policy (CSP) 1.0 parser has been enabled (Bug 875706).
The Mixed Content Blocker has been enabled, blocking insecure active content loads on HTTPS pages (Bug 864369).
New mail alert information can be customized now (Preferences/Mail & Newsgroups/Notifications) (Bug 856454, Bug 866503, Bug 872133, Bug 874899).
A confirmation prompt has been introduced to protect against accidental permanent data loss when force-deleting messages using Shift+Del (Bug 308690).
MailNews Save As Template supports multiple selections now (Bug 786316).
The size on disk is now shown for newsgroup folders (Bug 851275).
Fixes in Beta 1:
The Publish Webpage prompt in Composer has been fixed (Bug 887183).
Reporting a phishing site no longer sends potentially sensitive information from query parameters (Bug 871548).
POP3 local inbox folders no longer grow past the 4 GB limit when getting mail (Bug 640371).
MailNews search, filter and mail views no longer include messages on the date with "date" "is after"/"is before" (Bug 248808).
Session restore now ensures restored windows are actually on-screen (Bug 868964).
The search bar no longer saves the search history in private windows (Bug 861691).
The SSL Preference pane has been updated to accommodate changed preference names and semantics (Bug 861471).
Crtl+clicking a link opens it now even if the click event handler calls event.stopPropagation() (Bug 861194).
The Get Mail popup menu is now restored to full width after customizing the toolbar (Bug 859287).
MailNews folder size checks check the available disk space now (Bug 789679).
Attaching a message without trailing line break no longer corrupts the attachment (Bug 523796).
The browser feed preview has been adapted for Private Browsing (Bug 856322).
The MailNews subscribe dialog has been improved (the server of the selected folder is now selected and subscription checkboxes are now accessible) (Bug 849525).
Balloon notifications on new mail are no longer shown if the tray icon is disabled (Bug 857647).
Compacting large mail folders should be more stable now (Bug 794303).

New in SeaMonkey 2.19 (Jul 3, 2013)

New in SeaMonkey 2.19b2 Beta (Jun 27, 2013)

New in SeaMonkey 2.19b1 Beta (Jun 21, 2013)

Features:
Mark -> As Read now checks the state of all selected messages instead of only the first one's (Bug 768025).
Notifications for mixed content blocker have been implemented (Bug 842191).
A new 3rd-party cookie restriction to visited websites option has been added to the Cookies pref pane (Bug 845353).
The context menu Search option is now available for textareas and input fields (Bug 807326).
Website storage mechanisms are now available in the Data Manager (localStorage, indexedDB, etc.) (Bug 588415).
"Open Containing Folder" is now already available during download (Bug 497379).
Fixes:
The new mail alert has been disabled for now due to issues on Mac (Bug 840474).
The Geolocation prompt does not offer an action in Private Browsing mode anymore if the action remembers permission for more than a session (Bug 870728).
A slightly less useless access key has been chosen for the new Error Console Filter textbox label (Bug 860851).
Mixed content blocker preferences are now handled by Sync (Bug 860970).
LDAP passwords were requested for each lookup even if they were saved (Bug 833971).
Get New Messages for All Accounts has been fixed (Bug 855631).
The "File" button in the "Search messages" window has been renamed to "Move" (Bug 325777).
The entries in the "Trust junk mail headers set by" menu list are now sorted (Bug 847172).
The check for the allowed mail storage directory has been made more universal and accessible to extensions (Bug 848477).
A wrong message and reason was reported with untrusted CA roots when signing email (Bug 465351).
The IMAP-specific "Empty trash" confirmation dialog has been removed and the mailnews.*.dontAskAgain and mail.*.dontAskAgain prefs been merged (Bug 448624).
Help now explains what happens when Safe Browsing blocks a website (Bug 852809).
Email addresses with trailing whitespace could be displayed wrongly when composing and cause lost mails and malformed duplicate address book entries (Bug 286760).
Switching the account during message composing did not apply the signing prefs from the new account (Bug 624432).
The Help Glossary has been extended with new Privacy & Security terms (Bug 847182).
Growl support has been removed again (Bug 852461).
Safe Browsing debug has been turned off and Sync support turned on (Bug 851789).
The Bookmarks Toolbar was not populated with items if the grippy was collapsed when the browser window was opened (Bug 818437).
Special mail folder icons were not shown for IMAP shared folders (bug 840003).
Null bytes are now stripped from document titles when setting the window title in order to prevent Private Browsing spoofing (Bug 851527).
Invalid message ContentType values are handled better now (Bug 459474).
A tutorial section on User Tracking has been added to Help (Bug 844823).
The Customize Headers window prompted twice (Bug 524662).
ReplyTo has been added to the default IMAP headers in order to fix Reply with Template behavior (Bug 655428).
The offline folder flag will no longer be set for SPAM and TRASH folders (Bug 809990).
Help now includes documentation for the Offline Applications pref pane (Bug 771534).
The main Privacy & Security pref pane is now documented and features a Help button (Bug 631566).
The access key for "Perform these actions" now sets/moves focus to first action item in the Filter editor (Bug 825449).
Clear Private Data (preferences and menu) documentation has been added to Help (Bug 416234).
An "Error parsing template: expected to be first" message could appear when opening the virtual folder list dialog (Bug 747325).
The umask for emails saved as a file were not respecting the system umask (Bug 472865).

New in SeaMonkey 2.18b3 Beta (Apr 28, 2013)

New in SeaMonkey 2.18b2 Beta (Apr 20, 2013)

New in SeaMonkey 2.17.1 (Apr 15, 2013)

New in SeaMonkey 2.18b1 Beta (Apr 6, 2013)

New in SeaMonkey 2.17 (Apr 3, 2013)

New in SeaMonkey 2.17b3 Beta (Mar 29, 2013)

New in SeaMonkey 2.17b2 Beta (Mar 25, 2013)

New in SeaMonkey 2.17b1 Beta (Mar 18, 2013)

New in SeaMonkey 2.16.1 (Mar 13, 2013)

New in SeaMonkey 2.16 (Feb 20, 2013)

New in SeaMonkey 2.16 Beta 4 (Feb 9, 2013)

New in SeaMonkey 2.16 Beta 1 (Feb 1, 2013)

Add-ons may now provide custom plugin preview overlays for specific MIME types (bug 812898).
The message signature was misplaced when the Compose window was invoked by a mailto: link with body parameter and signature position set to "above the quote" (bug 545859).
Memory leaks and database corruption could happen when saving the Received header to the message database (bug 810637).
The Account Manager IMAP account option "Synchronize the most recent" is now saved correctly (bug 804091).
Reply All no longer converts all "To" recipients to CC, i.e. preserves the original destination fields now (bug 250187).
Trying to delete address book entries now asks for confirmation (bug 768005).
Page Info properly detects animated images again (bug 811904).
The distinction between high/medium/low-grade encryption has been removed (bug 810671).
The arrow images and labels of the Previous/Next buttons on the Compose window Table Properties dialog now appear properly separated (bug 371195).
In the Filter Rules dialog, new filter conditions are now inserted rather than appended (bug 392848).
The Preferences UI for the obsolete OCSP responder functionality has been removed (bug 810672).
CAF (Core Audio Format) has been added to the types of sound files selectable on Mac OS X (bug 791266).
When the Sidebar is collapsed on startup, the context menu is no longer broken (bug 802166).
Detection of illegal host names in the Account Manager has been improved (bug 80855).
Build support for BeOS and VMS has been removed (bug 808399).
Using the Delete key in the Feed Subscriptions window now works as expected (bug 805446).
Primary identities are now shown in bold on the Compose window's From identity picker (bug 793135).
The placement of the Advanced button in the Account Manager, Server Settings now depends on the server type (bug 779990).
If the Compose window is the last one open, the message is now sent correctly even if mailnews.sendInBackground is true (bug 807666).
The View button on the Message Security dialog of the Compose window is now disabled when there is no certificate to show (bug 804955).
The folder picker of the Move To/Copy To filter actions in the Filter Rules dialog now uses the cascaded layout instead of the flat list (bug 315367).
The collapsed state of accounts in the Account Manager now persists (bug 536248).
MailNews accounts and servers are now sorted by type, putting RSS and news accounts last (bug 749200).
The smime-type=enveloped-data parameter is now added to newly created signed/encrypted S/MIME messages in order to fix interoperability issues with Eudora (bug 498443).
Support for the HTTP keep-alive preference has been removed (bug 804657).
Feed previews now work even with JavaScript disabled (bug 804411).
On Mac OS X, tearing has been disabled and SeaMonkey now shows up under Productivity when sorting applications by Application Category in Finder (bug 803781).
The selected Outgoing Server (SMTP) is now scrolled into view so that the selection displays correctly (bug 736661).
Sanitizing of the "No Proxy for" list in Preferences has been improved (bug 783600).
Saved searches now work for searches on custom x-headers (bug 363238).
The default client check is now only done on startup instead of each time a new browser window is opened (bug 803585).
The filter context UI ("Apply filter when") in the Filter Rules dialog has been changed to use checkboxes (bug 775665).
The filter editor dialog layout has been improved slightly (bug 777287).
The Silverlight plugin is now run out-of-process in 32-bit mode on Mac OS X (bug 801272).
Subscribing to a newsgroup multiple times duplicated it (bug 795562).
The decimal separator used in message/file size display is now locale-dependent (bug 668756).

New in SeaMonkey 2.15.1 (Jan 21, 2013)

New in SeaMonkey 2.15 Beta 6 (Jan 3, 2013)

New in SeaMonkey 2.15 Beta 5 (Dec 22, 2012)

New in SeaMonkey 2.15 Beta 4 (Dec 15, 2012)

New in SeaMonkey 2.15 Beta 3 (Dec 8, 2012)

New in SeaMonkey 2.15 Beta 1 (Nov 27, 2012)

New in SeaMonkey 2.14 Beta 5 (Nov 19, 2012)

New in SeaMonkey 2.14 Beta 4 (Nov 10, 2012)

New in SeaMonkey 2.14 Beta 3 (Nov 3, 2012)

New in SeaMonkey 2.14 Beta 2 (Nov 3, 2012)

New in SeaMonkey 2.13.2 (Oct 29, 2012)

New in SeaMonkey 2.14 Beta 1 (Oct 23, 2012)

Features:
Added support for new light coloring on Mac OS X (bug 771284, bug 783822).
The MailNews message storage scheme now supports Gmail IMAP extensions X-GM-MSGID (unique message ID), X-GM-THRID (thread ID) and X-GM-LABELS (labels) in addition to XLIST (bug 721316).
Clicking the offline error page Try Again button goes online again now (bug 782892).
The mouse wheel Preferences pane has been rewritten (bug 782143). "Number of messages" and "Size on disk" are now shown in Folder Properties (bug 768621).
A Set Desktop Background dialog has been implemented (bug 632585).
Fixes:
Edited contacts could not be saved if the address book contained lists (bug 801615).
If a folder renaming fails during the compact process, removing folder files should be avoided now (bug 674742).
The feed validator failed to work with locations that need to be encoded (bug 789053).
Messages could show wrong content (body text) after a move to another folder (bug 790912).
Feeds that did not provide a last modified date failed to work (bug 790534).
Resetting Sync now handles add-ons properly (bug 792990).
All bookmarks were deleted and reset to default bookmarks if all bookmarks-*.json backup files were deleted (bug 779716).
The highlight behind the selected search term in the Filter Rules, Search Messages and Search Addresses windows has been removed (bug 202036).
The "Reply with template" filter action now gets hidden when no usable templates exist (bug 300930).
An ID has been added to the Web Development menu separator to make it easier for extensions to hook into the Tools menu (bug 785581).
The account manager no longer permanently disables unrecognized extension-added accounts (bug 592710).
Moving/copying feed subscriptions could stop downloads from happening (bug 781871).
The number of actions in the Filter Rules window is now unlimited (bug 778324).
Storing junk filter settings could fail for deferred email account due to invalid spamActionTargetAccount/Folder preferences (bug 536768).
The account manager Return Receipts pane now includes a Global Preferences button (bug 360891).
Uploading files larger than 2GB failed (bug 215450).
The display of the Sidebar Tabs menu button has been improved (bug 780278).
A delete confirmation dialog has been added to the MailNews Identity list editor (bug 360926).
If there is no sort order on an address book column, the first click on header now sorts ascending (bug 541934).
PDF attachments could not be opened from certain mails (bug 659355).
The compose window progress dialog now better differentiates between sending and saving of a message (bug 255050).
Support for closing inactive databases (folders). has been added in order to help improve memory footprint and file handle limit issues (bug 770559).
Double clicking a column header in the History window opened the selected history item (bug 776052).
The Most visited list on the Bookmarks Toolbar could contain repeat entries (bug 765689).
The layout of elements in the Filter Rules window now uses the space available in the dialog more efficiently and consistently (bug 743974).
Set Desktop Background now works with GNOME (bug 774130, bug 779300).
Move, Copy and Delete to Local Folders performed poorly with data stored on a network file system (bug 769346).

New in SeaMonkey 2.13.1 (Oct 13, 2012)

New in SeaMonkey 2.13 (Oct 10, 2012)

New in SeaMonkey 2.13 Beta 5 (Sep 30, 2012)

New in SeaMonkey 2.13 Beta 4 (Sep 30, 2012)

New in SeaMonkey 2.13 Beta 3 (Sep 24, 2012)

New in SeaMonkey 2.13 Beta 2 (Sep 24, 2012)

New in SeaMonkey 2.13 Beta 1 (Sep 24, 2012)

The folder pane now shows a popup over folders with unseen messages (bug 505056).
Sync can now open links received from other devices in tabs (bug 768950).
Manual zoom reduction (85%) did not hold and returned to 100% with routine navigation within a website (bug 663886).
MDN (return receipts) now work for non-standard headers and the MDN confirmation message now says which addresses the receipt will be sent to (bug 765820).
Redirecting and error visits are now properly handled, i.e. not added to global history (bug 772549).
The address book white list is now disabled in Junk Settings if adaptive junk mail control is not activated (bug 742503).
Address books in text format (text, CSV, tab) which contain non-ASCII display names and email addresses can now be imported properly (bug 145293).
Percent encodings on non-ASCII filenames are now decoded when saving a video snapshot (bug 767916).
A Preferences pane for Offline Applications has been added (bug 758677).
A click-to-play plugins option has been added to Preferences (bug 746110).
The wording of the Disk Space compacting option has been enhanced (auto compact does all folders at once) and the compact limit field is now disabled together with compacting (bug 758803).
A Layout sub menu has been added to the address book View menu (bug 762704).
The vertical space between actions on the MailNews Account Central page is now flexible (bug 681735).
Feed pages displayed in MailNews now support click-to-play plugins (bug 765466).
Enhanced support for feed enclosures: Support for more than one enclosure per message, Atom support, media:content support (bug 762631).
It could happen that MailNews account keys were reused in the same profile, leading to mails showing the wrong account in the Account column (bug 485839).
TCP/SSL handshakes are now overlapped with typing in the search box, improving responsiveness (bug 767920).
Ampersands did not appear in the Windows biff icon tooltip (bug 767323).
The Outlook Express address book can now be imported from a non-default location (bug 124486).
Temporary files created by mail composition did not get cleaned up correctly, leading to inability to add images inline (bug 671440).
Scrolling/switching to IMAP folders could lead to short hangs (bug 764306).
Multipart messages were downloaded entirely for each of their parts (bug 740453).
Attachments were sometimes not fully downloaded due to incorrect/smaller RFC822.SIZE set by MS Exchange, GMail and possibly others (bug 92111).
A DSN (Delivery Status Notification) option has been added to the Compose Options menu (bug 760644).
HTML5 form validation errors are now shown as tooltips (bug 601091).
The context menu handled OGG audio as OGV video (bug 763204).
The Bookmarks Manager had lost its window icons (bug 763493).
An animation is now shown when opening document-like windows on Mac OS X 10.7 Lion (bug 730751).
Extensions may now send messages to mailing list recipients via BCC (bug 761803).
Address book contacts now include an "Always prefer display name over message header" option (bug 761720).
The option when clicking a mail address that is already in the address book now reads "Edit Contact" instead of "Add to Address Book" (bug 131571).
When importing an address book as CSV, the dialog description pushed all buttons off screen (bug 762636).
Messages with undefined content type were incorrectly forwarded as attachment (bug 745919).
The List all Tabs menu now shows tabs that scrolled off screen in italics (bug 663343).

New in SeaMonkey 2.12 (Aug 29, 2012)

New in SeaMonkey 2.12 Beta 5 (Aug 25, 2012)

New in SeaMonkey 2.12 Beta 1 (Jul 23, 2012)

Major Changes:
Plugin instances can now be enabled individually in Click-to-Play Plugins mode (bug 756025).
Features:
Undo Add to Dictionary has been added (bug 715410).
Favicons have been added to back/forward and history (Go) menus (bug 751922).
Windows jump list entries support favicons now (bug 701432).
Google search is now using HTTPS (bug 567518).
Fixes:
Select all, Copy on the about: page did not paste correctly (bug 764862).
Trying to import a text address book could cause the description to push all buttons off screen (bug 762636).
Importing address books that contained a quoted string could crash the application (bug 474756).
(US English) accesskeys in the Compact Folders dialog are now ambiguous (bug 757425).
The "For at most X days" field in server settings is now checked for numeric values (bug 755518).
Feed OPML import/export has been improved (bug 750292).
The Build Identifier was missing from the about: page (bug 752797).
URLs appearing in the Page Info Links tab can now be opened in the browser (bug 620997).
Bad offline operations could prevent IMAP folders from updating (bug 754865).
Temporary files were not removed while sending (bug 299655).
New Tab preference Last Page Visited loaded the last visited page instead of the currently viewed one (bug 726415).
The "Check for new articles every X minutes" field in RSS account settings is now checked for numeric values and disabled when not needed (bug 755454).
Attachments that cannot be displayed inline were not shown in the attachment pane (bug 747770).
Partially downloaded message were sometimes considered a duplicate message (bug 714090).
Importing a .vcf (vCard) with empty lines did not work (bug 603265).
Image zoom (Page zoom) was reset when switching tabs (bug 721474).
When receiving a new email, the notification did not display the email address of the sender when he had no name (bug 684865).
The case of the server name in Account Settings could not be changed (bug 346263).
The account name could be corrupted due to improper updating when the user or server name changed (bug 720199).
Messages could be lost or corrupted if the network connection dropped while moving mails from an IMAP mail folder to a local mail folder (bug 522675).
Maildir handling of temporary files for IMAP offline store and notifications for moved/deleted local messages with Maildir have been fixed (bug 748807).
The Location Bar did not revert back to the correct URL when the user entered text then shift-middle clicked Go to open the location in a new tab (bug 752336).
Back/forward history navigation did not clear the old tab favicon (bug 749893).
Switching the profile now prompts to save the session (bug 658280).
After deleting an account in the Account Manager, the next account is now selected (bug 58713).
Account central is now displayed when no default account or no accounts are setup (bug 720661).
Support for closing inactive databases (mail folders) has been added (bug 723248).
A new filter is now inserted at the current position / above the selected filter (bug 103684).
Filters did not save if Tags Is Empty was set (bug 653859).
The Add/Remove Action buttons on the filter editor were missing tooltips and accesskeys (bug 742472).
The Account Settings Junk Settings panel has been reworked (bug 397197).
The scary message about multiple SMTP servers on Account Settings has been reworked (bug 391061).
The splitter in the MailNews Search dialog could get collapsed completely (bug 297006).

New in SeaMonkey 2.11 Beta 5 (Jul 12, 2012)

New in SeaMonkey 2.11 Beta 4 (Jul 2, 2012)

New in SeaMonkey 2.11 Beta 2 (Jun 23, 2012)

New in SeaMonkey 2.10.1 (Jun 19, 2012)

New in SeaMonkey 2.11 Beta 1 (Jun 9, 2012)

New in SeaMonkey 2.10 (Jun 6, 2012)

New in SeaMonkey 2.10 Beta 3 (Jun 4, 2012)

New in SeaMonkey 2.10 Beta 2 (Jun 4, 2012)

New in SeaMonkey 2.10 Beta 1 (May 14, 2012)

Major Changes:
The new minimum supported Windows version is now XP SP2, Windows 2000 support has been dropped
Features:
Internet Explorer's semicolons are mapped to commas now in the proxies list
The amount of tabs to be restored concurrently can be configured in Preferences now
The MailNews account wizard has been restructured and uses incoming/outgoing pages instead of server/login pages now
The MailNews reply header type can now be selected in Preferences
The domain name is highlighted in the location bar by default now
Links in View Source have Copy Link Location in their context menu now
Support for MAPI ResolveName was added
Certain global mailnews.* preferences are synced automatically now
News username and password auth dialogs have been combined and show for which server the prompt is now
The Linux/Unix wrapper shell script has been removed
Column sort was added to the Page Info dialog
Fixes:
The Master Password must be entered now before a password can be copied from the Data Manager
Feeds stability has been improved (prevented restarts, better biff performance)
The Download Now link was missing for partially downloaded POP3 messages
The Print icon in the Composer toolbar could not be added/removed
Signature switching in plaintext compose windows has been fixed
The "Search subfolders" option is now disabled if no subfolders exist
Saving new messages as file was impossible when the subject was empty
New Groups subscribe uses NEWGROUPS instead of LIST now
Waiting to enter the password for a POP3 account could result in the application hanging
Whitespace on feed or feeditem titles could lead to multiple folders of the same name
Expiration of news articles was broken
Saving a message in a local folder as .eml removed a starting dot from all lines and ignored lines that only contained a single dot
Forwarding of feed articles sometimes did not include the full text but the URL only
The "Delete from server" filter option has been removed for non-POP3 accounts
The displayed in-use size on the Cache Preferences panel is now reset when the cache is cleared
Subjects in message/rfc822 mails (used as attachment file names) are decoded now
Account Settings copied "Reply-To Address" between accounts when selected
"Check for new messages every x minutes" cannot be set to 0 with the corresponding checkbox enabled anymore
The Site Navigation Bar associates link rel='start' with "first" instead of "top" now
A crash could happen while writing a virtual folders save file
Base64-encoded .eml files in attachments could not be opened or saved
The Bcc field in Account Settings Copies & Folders is initialized to the current address now
Account Settings allowed setting the local directory of multiple accounts to the same physical directory and thus cause a crash when checking IMAP mail or regenerating msf files
Replying to .eml or message/rfc822 mails could lead to problems with a MIME-encoded subject
Browser windows appeared as just "SeaMonkey" in the DOM Inspector under Inspect Chrome Document
News username and password are no longer forgotten upon authentication failure
The feed subscriptions dialog has been improved
Multiple (Master) password prompts could happen on startup when using news authentication
When sending of a message was aborted, temporary files could be left behind after quitting
Getting MailNews feed messages has been improved
Invalid Junk settings could be left behind when the target folder belonged to a deleted account
The Page Info Security tab did not show cookies for sites with IP:8080 addresses
All columns in Page Info tabs could be hidden

New in SeaMonkey 2.9.1 (May 2, 2012)

New in SeaMonkey 2.9 Beta 4 (Apr 24, 2012)

New in SeaMonkey 2.9 Beta 3 (Apr 17, 2012)

New in SeaMonkey 2.9 Beta 1 (Mar 27, 2012)

Features:
New locales: Ukrainian (uk) (bug 726486), Chinese (Traditional) (zh-TW) (bug 713649).
The File and Move Bookmarks dialogs are resizable now (bug 605786, bug 732808).
Lightning toolbars can be customized now (bug 721330).
HTML5 videos that do not start automatically show a large play button now (bug 721881).
The Download Manager window supports lightweight themes (Personas) now (bug 721583).
Ctrl+Shift+K as shortcut for the Lighting Task Quick Filter is supported now (bug 719034).
Unsorted Bookmarks has been added to the Bookmarks menu and the Personal Toolbar has been renamed to to Bookmarks Toolbar (bug 588807).
Sounds are now played using libcanberra instead of esound on Linux (bug 635918).
Sync can sync installed add-ons now (provided they are available from AMO) (bug 713087).
Bookmark This Link has been added to feeds' Website header link context menus (bug 711779).
"Open in Browser" was added to the context menu for opening a website from RSS (bug 688745).
Attachments on compose windows can be renamed using F2 on Windows and Linux now (bug 718310).
Addresses can be dragged from the the address book sidebar now (bug 713405).
Pasting a URL from the clipboard into the Download Manager window will download it (bug 719196).
The Feed Subscribe dialog remembers where you place it now (bug 712035).
A Print button can be added to the compose window toolbar now (bug 718517).
Spelling settings now have their own preferences pane under Appearance (bug 527173).
Plugins can be disabled for the whole suite now in addition to Mail & Newsgroups only (bug 620776).
Support for other message storage formats (pluggable mail stores) has been added (bug 402392).
Fixes:
The chrome directory was missing in fresh profiles (bug 728840).
An IPv6 address literal was not usable as a MailNews server name (bug 491843).
"View Background Image" in the context menu for stand-alone video content has been disabled (bug 729633).
Some RSS feeds were not properly recognized (bug 723469).
Errors attaching anchor parts when sending mail could lead to issues with fancy signature files (bug 714825).
The UI could freeze on feed biff/get new messages (bug 711173).
MIME parts in a multipart/related context that were not referred to or could not be displayed inline were not available as attachments (bug 674473).
The onchange and input events were not fired for all form elements on restore (bug 700144).
Background tabs were not set to an inactive state (bug 728096).
A MIME part with content-disposition: attachment was not displayed as an attachment if it did not have a filename (bug 705431).
The Print button in the MailNews toolbar was misaligned with the Modern theme (bug 722758).
LDAP address book results were not sorted when autocompleting was active (bug 380636).
Marking as Junk with "Delete mail marked as junk" set undeleted deleted mail (bug 228949).
Auto-save will not happen anymore if a message is currently being sent (bug 714452).

New in SeaMonkey 2.8 (Mar 14, 2012)

New in SeaMonkey 2.8 Beta 6 (Mar 9, 2012)

New in SeaMonkey 2.8 Beta 5 (Mar 7, 2012)

New in SeaMonkey 2.8 Beta 4 (Mar 7, 2012)

New in SeaMonkey 2.8 Beta 3 (Feb 25, 2012)

New in SeaMonkey 2.7.2 (Feb 18, 2012)

New in SeaMonkey 2.8 Beta 2 (Feb 10, 2012)

New in SeaMonkey 2.8 Beta 1 (Feb 4, 2012)

New in SeaMonkey 2.7 Beta 3 (Jan 20, 2012)

New in SeaMonkey 2.7 Beta 2 (Jan 2, 2012)

New in SeaMonkey 2.7 Beta 1 (Dec 26, 2011)

New in SeaMonkey 2.6.1 (Dec 23, 2011)

New in SeaMonkey 2.6 Beta 3 (Dec 10, 2011)

New in SeaMonkey 2.6 Beta 2 (Dec 4, 2011)

New in SeaMonkey 2.6 Beta 1 (Nov 24, 2011)

New in SeaMonkey 2.4 (Sep 30, 2011)

New in SeaMonkey 2.3.3 Final (Sep 7, 2011)

New in SeaMonkey 2.3.2 Final (Aug 31, 2011)

New in SeaMonkey 2.3 Final (Aug 16, 2011)

New in SeaMonkey 2.3 Beta 3 (Aug 8, 2011)

New in SeaMonkey 2.3 Beta 2 (Aug 2, 2011)

New in SeaMonkey 2.2 Final (Jul 8, 2011)

New in SeaMonkey 2.2 Beta 2 (Jun 29, 2011)

New in SeaMonkey 2.2 Beta 1 (Jun 23, 2011)

New in SeaMonkey 2.1 (Jun 10, 2011)

Sync (f.k.a. Weave) is now included directly in SeaMonkey. Sync allows you to keep your browsing history, passwords, bookmarks, preferences and tabs in sync across different devices (computers) in a secure way.
SeaMonkey windows can now be themed with Personas (lightweight themes).
The bookmarks system has been reworked to use the Places framework shared with Firefox (already used for history data in SeaMonkey 2.0), including a new Bookmark Manager and fast bookmarking button in the location bar.
Find in Page now works with a toolbar instead of a modal window.
OpenSearch plugins are now supported and the default for web search.
An optional search bar (including suggestions if the search engine supports it) is available in browser toolbar customization, and an engine manager for OpenSearch is available.
More toolbar widgets are now customizable.
The new Add-ons Manager opens directly in the browser now and has received a major facelift.
The new Data Manager now unifies cookie, permission, password, and form data management.
Flash cookies (LSOs) will now be removed when using Clear Private Data / Cookies (requires Flash Player 10.3 or better).
Plugin crashes do not take down the whole application anymore since plugins run in their own processes now.
Plugins now work in feeds shown in MailNews windows.
The feed preview UI and the Helper Applications preferences can now detect the system's default feed reader and use it.
Page zoom is being remembered on a site-specific basis now.
The browser tab bar is now scrollable to cope with tab overflow. This includes an "All Tabs" navigation button to quickly list all open tabs.
You can now drag and drop downloads, e.g. from the Download Manager to the desktop.
SeaMonkey now shows "doorhangers" for notifications like remembering log-in passwords or after installing an extension.
The new DoNotTrack HTTP header is supported (configurable in Preferences).
A page with Troubleshooting Information (about:support) and the option to restart in Safe Mode are now available from the Help menu.
Loading the URL about:memory now shows how much memory is used by different parts of SeaMonkey.
SeaMonkey should now support more websites that previously appeared to only work with Firefox (configurable in Preferences).
Built-in extensions (ChatZilla, JavaScript Debugger and DOM Inspector) are now installed into the profile.
News messages can now be deleted from local storage.
Cascaded Session Restore improves restoring large browsing sessions.
SeaMonkey now uses Omnijar which results in fewer installed files, less fragmentation and better startup time.
Platform-specific changes:
Windows 7 Jump Lists support was added.
Download progress is now shown in the Windows 7 taskbar.
Mozilla platform changes:
Better performance on startup and shutdown, and memory usage improvements.
Protection from out-of-date plugins has been added.
Text areas in web forms are now resizable.
CSS :visited selectors have been changed to block ways that websites can quickly check a user's browsing history.
The WOFF format for downloadable website fonts is now supported.
SMIL animation in SVG is now supported.
New CSS attributes such as gradients, background sizing, and pointer events have been implemented.
A new HTML5 parser is used for all HTML documents.
New DOM and HTML5 features including the Drag & Drop API and the File API are now supported.
JS-ctypes support has been improved, allowing in-application JavaScript code to access native system libraries.
HTML5 video can now be viewed full screen and supports both the WebM format and the "buffered" property.
Web developers can animate content using CSS Transitions.
The W3C Indexed Database API is now available to websites.
JavaScript is faster than ever with the new JägerMonkey engine.
Support for WebGL, Direct2D and Direct3D acceleration on Windows has been added (see about:support for support and Preferences for configuration).
The HSTS security protocol and the proposed Audio Data API are available.
OpenType support has been improved.
HTML5 Forms API support has been added.

New in SeaMonkey 2.1 RC 1 (May 13, 2011)

Sync (f.k.a. Weave) is now included directly in SeaMonkey. Sync allows you to keep your browsing history, passwords, bookmarks, preferences and tabs in sync across different devices (computers) in a secure way.
SeaMonkey windows can now be themed with Personas (lightweight themes).
The bookmarks system has been reworked to use the Places framework shared with Firefox (already used for history data in SeaMonkey 2.0), including a new Bookmark Manager and fast bookmarking button in the location bar.
Find in Page now works with a toolbar instead of a modal window.
OpenSearch plugins are now supported and the default for web search.
An optional search bar (including suggestions if the search engine supports it) is available in browser toolbar customization, and an engine manager for OpenSearch is available.
More toolbar widgets are now customizable.
The new Add-ons Manager opens directly in the browser now and has received a major facelift.
The new Data Manager now unifies cookie, permission, password, and form data management.
Plugin crashes do not take down the whole application anymore since plugins run in their own processes now.
Plugins now work in feeds shown in MailNews windows.
The feed preview UI and the Helper Applications preferences can now detect the system's default feed reader and use it.
Page zoom is being remembered on a site-specific basis now.
The browser tab bar is now scrollable to cope with tab overflow. This includes an "All Tabs" navigation button to quickly list all open tabs.
You can now drag and drop downloads, e.g. from the Download Manager to the desktop.
SeaMonkey now shows "doorhangers" for notifications like remembering log-in passwords or after installing an extension.
The new DoNotTrack HTTP header is supported (configurable in Preferences).
A page with Troubleshooting Information (about:support) and the option to restart in Safe Mode are now available from the Help menu.
Loading the URL about:memory now shows how much memory is used by different parts of SeaMonkey.
SeaMonkey should now support more websites that previously appeared to only work with Firefox (configurable in Preferences).
Built-in extensions (ChatZilla, JavaScript Debugger and DOM Inspector) are now installed into the profile.
News messages can now be deleted from local storage.
Cascaded Session Restore improves restoring large browsing sessions.
SeaMonkey now uses Omnijar which results in fewer installed files, less fragmentation and better startup time.
Platform-specific changes:
Windows 7 Jump Lists support was added.
Download progress is now shown in the Windows 7 taskbar.

New in SeaMonkey 2.0.14 (Apr 29, 2011)

Fixes for a number of non-security-relevant crashes, increasing the stability of the whole platform and the Mail & Newsgroups part of SeaMonkey
MailNews:
Search Messages window/dialog bottom buttons not re-enabled after delete and repeated search (Bug 594090)
Some "-compose" command line options won't work if they are the first or only argument (Bug 627999)
Certificates & Security Features:
crash with an empty issuer name in SSL certificate, +leak fix [@ strcmp | AuthCertificateCallback(void*, PRFileDesc*, int, int)] (Bug 644012)
Enable multiple roots from NSS 3.12.9 for EV. (Nov/Dec 2010 batch) (Bug 614852)
Mozilla upgrade to NSS 3.12.9 final (Bug 618368)
PSM crashes [@ ProcessAuthKeyId ] when CERT_DecodeAuthKeyID(arena, extData) fails (Bug 529485)
General:
Add src parameter to AMO API pings (Bug 610066)
Windows:
generate-id() function leaks information about valid heap addresses (Bug 640339)
Automatic updates get stalled when installed version is newer than a downloaded update restored using Windows system restore. (Bug 601701)
Compiling:
Hourly/Nightly builds should have some way to see which {comm-central|mobile-browser|camino} changeset was used, too (Bug 549958)
[1.9.1 & 1.9.2] put en-US.xpi under obj-firefox/dist/platform/xpi rather than obj-firefox/dist (Bug 628795)
Platform:
"copy link location" fails to copy the letter H and the number 0 where present (Bug 377392)
Properly distinguish soft and hard blocked items in the update pings (Bug 630575)
crash [@ nsAutoCompleteController::StartSearch ] when typing things too rapidly inside the location bar (Bug 616288)
browserscope richedit tests load http://www.google.com/intl/en_ALL/images/logo.gif over the network (Bug 628980)
Update .bt entry in PSL (Bug 615530)
Enable IDN for .ua (Bug 621686)
Add gob.ec to PSL (Bug 621707)
Add bv.nl to PSL (Bug 621710)
Add .masr (Egypt) to IDN TLD whitelist (Bug 624733)
test_bug428847.html (by way of file_bug428847-1.xhtml) loads http://www.mozilla.com/whatever.xsl over the network (Bug 628966)
Every dom-level1-core mochitest loads http://www.w3.org/StyleSheets/activity-home.css over the network (Bug 628974)
Suppress CSS parser diagnostics in ParseSelectorString (Bug 631615)
Add src parameter to AMO API pings (Bug 602367)

New in SeaMonkey 2.1 Beta 3 (Apr 7, 2011)

New in SeaMonkey 2.0.13 (Mar 23, 2011)

New in SeaMonkey 2.0.12 (Mar 3, 2011)

Browser:
"Always use Google to subscribe to feeds" setting ignored (Bug 612265)
MailNews:
E-mails found with advanced search cannot be opened by double click [RestoreSelectionWithoutContentLoad is not defined] (Bug 545420)
Certificates & Security Features:
Enable multiple new roots from NSS 3.12.8 for EV. (Bug 582579)
Windows:
xpfe "history-dropmarker" binding makes invalid assumption about menupop children (Bug 406396)
Permission denied exception string way too descriptive (Bug 549459)
Compiling:
no longer generating en-US langpacks after bug 578393 (Bug 609878)
Back port LDAP ASLR onto the current Thunderbird/SeaMonkey releases (Bug 623498)
'* comm-1.9.1 unit test' fail to 'buildsymbols' and 'package', since upgrade to buildbot 0.8 (Bug 619005)
Platform:
JavaScript toLocaleString has a nasty memory leak (Bug 617097)
Continuous "test_bug614116.html | Test timed out" on branches since that test landed there (Bug 616219)
Add . to IDN whitelist (Bug 580161)
Add .il to IDN whitelist (Bug 597030)
Add tsk.tr to PSL exceptions (Bug 606922)
Update .tz entry in PSL (Bug 606923)
Intermittent failure in test_fallback.html | Fallback page displayed for top level document (Bug 541396)
Crash [@ nsSubDocumentFrame::AttributeChanged] with throwing error and removing type attribute on iframe (Bug 589635)
Firefox pointer dereference (Bug 614756)
[SeaMonkey] check: TestTXMgr.cpp (nsITransactionManager tests) intermittently times out in "Aggregate Transaction Stress Test" (Bug 615045)
java.security.AccessControlException when calling privileged Java methods from chrome (Bug 620773)
In modal dialog (window.open with modal=yes) child windows and dialogs do not populate with expected content (Bug 406375)
Fix the plugin blocklisting test to handle a new window which is opened when we update our blocklist (Bug 614868)
-generated toolbar items are cloned when leaving toolbar customize (Bug 608687)
mochitests-2: intermittent "test_fallback.html | Exited with code 1 during test run" (ASSERTION: XPConnect is being called on a scope without a 'Components' property!) (Bug 615923)

New in SeaMonkey 2.1 Beta 2 (Feb 14, 2011)

New in SeaMonkey 2.0.11 (Dec 10, 2010)

New in SeaMonkey 2.0.10 (Oct 29, 2010)

New in SeaMonkey 2.1 Beta 1 (Oct 25, 2010)

New in SeaMonkey 2.0.9 (Oct 20, 2010)

New in SeaMonkey 2.0.8 (Sep 16, 2010)

New in SeaMonkey 2.0.7 (Sep 16, 2010)

New in SeaMonkey 2.1 Alpha 3 (Aug 25, 2010)

Major Changes :
The bookmarks system has been reworked to use the Places framework shared with Firefox (bug 498596), which will allow enabling Bookmarks with the Sync add-on (bug 585845).
Several methods of the Firefox TabBrowser API (bug 558614, bug 558673, bug 579845) were implemented in SeaMonkey, which will allow to enable Tabs with the Sync add-on (bug 567583).
The tab bar received a visual refresh. (bug 579732)
Gopher support has been removed. (bug 572389)
Web developers can animate content using CSS Transitions.
SeaMonkey now defaults to tabbed browsing instead of opening new windows. (bug 505311)
Address book toolbars can now be customized. (bug 575956)
Find in Page now works with a toolbar instead of a modal window. (bug 97023)
The browser can now be themed with Personas (lightweight themes). (bug 563261)
The upcoming Gecko release has been renamed from 1.9.3 to 2.0. (bug 570022)
The User-Agent (UA) string now exposes less information. (bug 572668: Crypto token, bug 572656: UI language, bug 581783: "Windows;")
The Add-on Manager now shows add-on Preferences buttons (bug 562890) and versions (bug 562052) directly in the list and searches AMO now (bug 558287).
SeaMonkey now supports the HTML5 video "buffered" property.
XPCOM registration has been changed. (bug 568691)
Archiving can now keep the folder structure intact (no configuration UI yet). (bug 573392)
The W3C Indexed Database API is now available to websites. (bug 553412)
Browser :
Update Comment on mimeTypeIsTextBased to Include Request to Update findbar.xml Upon Any Changes (Bug 580520)
Find / FAYT is not focusing on correct tab, so returns no or invalid results (Bug 584630)
Move mTabContainer to tabContainer (Bug 577756)
Icons sometimes set on wrong tab (Bug 585511)
Load favicon images into faviconService when allowed to (Bug 585515)
Implement Firefox TabBrowser API: selectTabAtIndex() to get feature parity (Bug 579845)
Fix parameter usage in loadOneTab and addTab, also add new option to openUILinkIn to explicitly focus newly opened tab (Bug 583997)
support paste command in FAYT mode (Bug 257489)
Page Info tabs aren't drawn correctly (Bug 581686)
Eliminate users of browsers.item (Bug 586055)
MailNews :
Customize Address Book toolbars (Bug 575956)
Port |Bug 522761 – Need option 'keep folders scheme' under the archive feature to don't forget the messages organization| to SeaMonkey (Bug 573392)
[IMAP] Archive subfolders not shown in folder pane directly after their creation (Bug 494266)
General :
Search/Find in page UI: toolbar instead of dialog (Bug 97023)
Restart dialog message is confusing (Bug 561176)
IsTargetEditable could use isContentEditable (Bug 570205)
Remove references to nonexistent IDs (Bug 582710)
Add-ons Manager window shows multiple times (Bug 566593)
Port bug 566910 'copy password' context menu item for password manager (Bug 568181)
Update Help for new Link Behavior preference panel (Bug 574609)
Double separator in menu of Bookmarks button in the Personal Toolbar (Bug 586050)
Switch SeaMonkey bookmarks to places backend (Bug 498596)
Make about: link SeaMonkey website and relnotes (Bug 555939)
Port Firefox bookmarks tests to SeaMonkey (Bug 557496)
Make lightweight themes / personas work with SeaMonkey trunk in browser windows (Bug 563261)
Clean up SeaMonkey versions of getFileDisplayName (Bug 572454)
Improve security button look in default theme (Bug 579731)
Make the tab bar look better in the default theme, including in lwthemes (Bug 579732)
[mochitest-browser-chrome] numerous browser_searching.js failures on SeaMonkey (Bug 580223)
Add new places core for bookmarks (and history) (Bug 580656)
Make suite glue initialize and migrate places bookmarks (Bug 580658)
Switch SeaMonkey browser UI to places bookmarks (Bug 580660)
Add management UI for places bookmarks (Bug 580662)
Remove old bookmarks system code (Bug 580663)
Package layout.xpt (Bug 583043)
Make Modern work nicely with places bookmarks work (Bug 584752)
Add SeaMonkey 2.1a3 and 2.1b1pre to crash-stats.m.c (Bug 587513)
In Advanced/General/Choose "en-US" (set via intl.accept_languages) is not match to "en-us" (Bug 370387)
Port Bug 363130: make menuitem icons 16x16px consistently on Windows/Linux. (Bug 517469)
Move the Link Behaviour preferences from the tabs pane to a separate pane. (Bug 570970)
[SeaMonkey] Don't pass strings to setTimeout (Bug 571517)
Move popups, panels, and tooltips into popupsets (e.g. mainPopupset) (Bug 572682)
Second getChildList parameter is now optional (Bug 577225)
Use instead of (Bug 578440)
Make lightweight themes / personas work with browser on Mac (Bug 579737)
Status Bar Icons No Longer Display (Bug 580868)
"Bookmark This Link" does not work (Bug 574264)
Windows
Page Info - Permissions, Ineffectual on https: sites (Bug 579747)
Update browser_pluginnotification.js to work with Addon Manager in tab. (Bug 573921)
Cannot use IME on FAYT of SeaMonkey (Bug 316646)
[SeaMonkey] test_bug429954.xul fails with JS Error (Bug 573598)
PageInfo Dialog is too short (Bug 534322)
Remove redundant pref-offline UI which was commented out since 2001. (Bug 577514)

New in SeaMonkey 2.0.6 (Jul 20, 2010)

New in SeaMonkey 2.1 Alpha 2 (Jul 8, 2010)

Major Changes :
New Add-ons manager. (Bug 561600)
Drag URL/file to/from SeaMonkey's Download Manager. (copy/move to desktop/folder) (Bug 192728)
Save multiple messages as individual files in directory. (Bug 555972)
Make Search, Folder Location and Views widgets for MailNews customizable toolbars. (Bug 521927)
WebM video is now supported for HTML5 tag. (Bug 566245)
View source is now consistently taken from the platform and appearing in a SeaMonkey look and feel across all invocations. (Bug 411754)
Loading the URL about:memory now shows how much memory is used by different parts of SeaMonkey.
SeaMonkey now supports a lot of the same tabbrowser API as Firefox. (Bug 467867)
Search and Go buttons widgets for Browser are now customizable. (Bug 529647)
The feed preview UI and the Helper Applications preferences can now detect the system's default feed reader and use it. (Bug 471346)
HTML5 Websockets are now available to website authors. (Bug 472529)
See the wiki page on SeaMonkey 2.1 Features for a good list of major changes in this release.
Browser :
Rename mTabs to tabs in suite tabbrowser (Bug 573733)
Port Bug 529674 [Restore windows at the saved position without moving them around on the screen] to SeaMonkey (Bug 558641)
Port Bug 506482 [Don't write sessionstore.js to disk for read only events] to SeaMonkey (Bug 558646)
Port Bug 561702 [sessionstore should not use RegExp static state] to SeaMonkey (Bug 567726)
MailNews :
Make use of Services.jsm in suite commandglue.js (Bug 572080)
Make Search, Folder Location and Views widgets for MailNews customizable toolbars (Bug 521927)
Reordering of newsgroups using drag & drop doesn't work anymore (Bug 556887)
Remove dead variable "messages" from archiving code (BatchMessageMover) (Bug 571713)
Port |Bug 522252 - make archiving of read-only folders do a copy, not a move| to SeaMonkey (Bug 573278)
Port |Bug 559040 - Make the internal archiving code work for any set of messages thus being nicer to extensions| to SeaMonkey (Bug 570578)
Save multiple messages as individual files in directory (Bug 555972)
General :
New mochitest failures in SeaMonkey (Bug 572703)
[Port Bug 479899 to SeaMonkey Modern] s/#autoscroller/.autoscroller/g (Bug 482218)
System setting for mouse wheel not documented (Bug 280873)
[SM] Customize toolbar sheet moves when selecting the show dropdown menu (Bug 566424)
pages loaded from search results should highlight the search term (Bug 158773)
Font help for User Defined (Bug 159254)
Add possibility to drag downloaded files from download window and drop/move them to desktop (as example) (Bug 192728)
Add/port about:support (Troubleshooting Information page) to SeaMonkey (Bug 545110)
Use Suite's search tips rather than toolkit's in suitehelp.rdf (Bug 566139)
Port |Bug 489994 - Downloads list should honor always remember helper application| to SeaMonkey (Bug 569898)
Overlay suite features onto toolkit view source window (Bug 411754)
Port Bug 520659 (Lazily build places trees when possible) to SeaMonkey (Bug 547815)
Clean up nsContextMenu.js, lay the base for future work touching it (Bug 562339)
Add SeaMonkey 2.1a2 and 2.1a3pre to crash-stats.m.c (Bug 573989)
Remove nsAddonRepository.js on updates (Bug 574467)
Fix filenames for mozilla help to follow readme-style (Bug 226191)
Replace "Download retention" with "Download history" in Browser preferences (Bug 566484)
Implement Firefox TabBrowser API: getIcon() (Bug 558673)
SeaMonkey part of Toolkit bug 561116 (Bug 561645)
Make Search and Go buttons widgets for Browser customizable toolbars (Bug 529647)
rights infobar not displayed any more (Bug 573384)
Windows :
Open the Addon Manager in a tab (Bug 566905)
Make notification bar open the Addon Manager in browser rather than its own window (Bug 572049)
Installing Trunk 2.1a Overtop Existing Branch 2.0 Causes Non-Functional SeaMonkey (Bug 562047)
PCA complains when installer is cancelled (Bug 569791)
Compiling :
[SeaMonkey, non-nightly] Fix "Warning: package error or possible missing or unnecessary file: ..." (Bug 564606)
[SeaMonkey] crashtest and reftest suites hang at startup since "new add-ons manager UI" landing (Bug 563012)

New in SeaMonkey 2.0.5 (Jun 23, 2010)

Browser :
Web searches in sidebar pass symbols rather than spaces to the search engines (Bug 506511)
MailNews :
crash (while using Gmail Conversation View add-on) when click Reply inside the message window [nsMsgComposeService::GetOrigWindowSelection(int, nsIMsgWindow*, nsACString_internal&)] (Bug 562647)
Testsuite: base64-encode atob() is broken (Bug 534781)
gloda deletion processing is more expensive than it needs to be (Bug 530098)
Copy bug 511967 .../locales/Makefile.in changes to comm-central (Bug 554939)
General
download progress dialog doesn't remember position / coordinates (Bug 552970)
Update Help for the additional settings in Software Installation preferences (Bug 547931)
Update help for history window changes after places landing (Bug 472873)
Deleting a locked profile fails silently (Bug 561768)
Windows :
Very slow file manipulation deleting or moving messages (profile stored on synchronized network folder). Tb3 requests write for each line of mail data. Should use buffering. (Bug 539389)
gfxWindowsFonts.h: FontEntry::FontEntry fails to initialise mWindowsFamily and mWindowsPitch (Bug 555091)
Enabled column in Message Filters does not track dialog size properly (Bug 518134)
newsgroup filter from "create filter from message" is not created (Bug 541408)
Custom filters generate an error in searchSpec (Bug 549336)
Alt+Tab sometimes causes the menubar to unhide briefly (Bug 525762)
[Debug Windows SeaMonkey 2.1] mochitest-chrome: the 3 layout/base/tests/chrome/test_printpreview*.xul time out (Bug 556686)
Compiling :
[Shredder] Trunk packaging shouting about a missing file: "config/printconfigsetting.py': [Errno 2] No such file or directory" (Bug 548788)
js/src/config/check-sync-dirs.py doesn't check file contents (Bug 550704)
Define BIN_SUFFIX for removed-files.in (Bug 496809)
Port MOZ_IPC support to comm-central (Bug 549293)
Resync' client.py on c-1.9.1 after bug 508955 and bug 538528 (Bug 552955)
Package nsMicrosummaryService.js in SeaMonkey (Bug 554855)
Port |Bug 496809 - Define BIN_SUFFIX for removed-files.in| to SeaMonkey (Bug 556409)
Bug 526760 follow-up: update SM 2.0 removed-files.in too (Bug 558985)
Port |Bug 560166 - the drag & drop any link to contents area completely fails| to SeaMonkey (Bug 560443)
Platform :
Workers: Don't let worker messages run if the worker is suspended (Bug 547399)
Workers: Don't assume we always get a JSErrorReport in DOMWorkerErrorReporter (Bug 558182)
Re-seed Math.random() for each window/frame/context (Bug 475585)
The .message of a DOM Worker error event is not populated when the worker does |throw new Error("data");| (Bug 557346)
Prefixing a string to an empty autostring causes an extra pointless copy (Bug 479057)
Crash on event.dataTransfer.setDragImage({},0,0) [ nsINode::GetCurrentDoc() ] [ PresShell::RenderNode(nsIDOMNode*, nsIRegion*, nsIntPoint&, nsIntRect*) ] (Bug 548185)
IRAN.ir should be known as an Effective TLD (Bug 557604)
HTMLContentSink needs to participate in cycle collection (Bug 556241)
Unprivileged users are not notified of security updates (Bug 407875)

New in SeaMonkey 2.1 Alpha 1 (May 21, 2010)

New in SeaMonkey 2.0.4 (Mar 30, 2010)

Browser :
Closing browser / switching profile keeps and later restores state / open tabs and history (Bug 486696)
MailNews :
Null pointer dereference or redundant check in mailnews/mime/src/mimei.cpp. (Bug 532108)
gloda indexes while offline, if we startup without a network connection (Bug 533776)
Autocomplete - primary email address no longer appears before additional email address (now sorted alphabetically) (Bug 543088)
Port Bug 410996 - Answering a news article in a saved search folder not stored under a news account creates mail reply instead of follow-up (Bug 546040)
Reply button doesn't launch mail composition window. (Bug 549802)
crash [@ nsMsgSearchValidityTable::GetAvailable(int, int, int)] in matchAll filters using saved search or updating filters (Bug 514945)
crash [@ nsImapMailFolder::UpdateImapMailboxInfo(nsIImapProtocol*, nsIMailboxSpec*)] (Bug 531792)
Too many .msf file open with many third level folders and Show only subscribed folders unchecked/disabled (Bug 549794)
WARNING: goofy tree selection state: two ranges are adjacent!: 'endFirstRange == startRange' with test_delete_multiple_messages_with_first_selected_message_open in test-deletion-with-multiple-displays.js (Bug 540252)
crash [@ nsMsgXFViewThread::AddHdr(nsIMsgDBHdr*, int, unsigned int&, nsIMsgDBHdr)] manipulating messages in virtual folder (Bug 539784)
crash [@ NS_strlen(unsigned short const*)] - [@ nsImapProtocol::ShowProgress] with IMAP and Galician locale. (Bug 506669)
ChatZilla :
Langpack incompatible with SM version > 2.0 (Bug 540842)
Certificates & Security Features :
Update Mozilla stable branches to NSS 3.12.6 and minimal support for RFC 5746 (Bug 545755)
General
[SeaMonkey] FTP file upload not working (Bug 467524)
Update Help on Popup Windows preferences (Bug 543332)
Remove repetitions (the, of) from Help (Bug 543336)
Turning Encryption On and Off is no longer an option, remove it from Help (Bug 543340)
Remove last traces of Quick Launch from Help (Bug 545765)
Windows :
[SeaMonkey, Debug] (Windows) Mailnews packaged tests are all T-FAIL due to missing dll(s) (Bug 550018)
imap STATUS not closing db - mail.check_all_imap_folders_for_new and "check this folder for new messages" causes high memory and error message Unable to open the summary file for xxxxx. Perhaps there was an error on disk, or the full path is too long. (Bug 540214)
Eliminate sources of O(N^2) backtracking in the linebreaker. (Bug 548495)
crash [@ nsAString_internal::Assign(nsAString_internal const&)] (Bug 537828)
Overflow at CEnumFormatEtc::Next (Bug 538891)
Undated RSS and Atom feeds result in display of bad date (Bug 543375)
Port |Bug 508861 - [electrolysis] Build/ship the C++ runtime with MSVC/jemalloc| to comm-central. (SeaMonkey packaging fix only) (Bug 538753)
Firefox crashes at [@ JapaneseContextAnalysis::GetConfidence(int)] (Bug 547487)
crash [@ nsMessengerWinIntegration::SetupInbox()], mostly startup crashes (Bug 272361)
change nsDeque to use malloc for mData (Bug 464043)
crash [@ nsHTMLAreaElement::UnbindFromTree(int, int)] (Bug 533061)
crash [@ apply_rfc2047_encoding ] while importing from outlook 2010 (Bug 541149)
Put a runtime NS_IsMainThread check in nsCycleCollector::Suspect2 and Forget2 (Bug 521750)
Violation of Microsoft's copyright in IENUMFE.CPP / IENUMFE.H? (Bug 533691)
pasting clipboard content to OpenOffice Writer broken (Bug 537414)
Special Operating Systems :
AIX: JavaScript error: , line 0: uncaught exception: [Exception... Component returned failure code: 0x8007000e (NS_ERROR_OUT_OF_MEMORY) [nsIDOMJSWindow.openDialog] (Bug 488423)
AIX: Mozilla Firefox Cannot add bookmarks on AIX platform (Bug 516667)
AIX: compilation error in gfxFontTest.cpp on AIX 5.1 (Bug 448197)
AIX: AIX Port Seamonkey 2.0: macro redefinition in mailnews/base/src/nsMsgAccountManager.cpp (Bug 525463)
AIX: AIX port unresolved external symbol, nsAutoSyncManager.cpp (Bug 537594)
AIX: AIX Port TOC overflow when linking static thunderbird-bin (Bug 537642)
AIX: AIX port compilation error in js/src/jsstdint.h (Bug 537784)
AIX: C++ style comments in C unit widget/src/gtkxtbin/gtk2xtbin.c (Bug 547957)
Compiling :
client.py should error out early if wrong python version (Bug 537571)
[Tracking] Resync' configure.in between c-1.9.1 and m-1.9.1 (Bug 496236)
Port |Bug 473411 - the rule for DIST_FILES should create dist/bin| to c-c (Bug 543294)
Port |Bug 422986 -- make -j2 -f client.mk profiledbuild fails| to comm-central (Bug 543296)
Remove MOZ_VALGRIND from comm-central (Bug 545133)
Port |Bug 495224 - Builds involving symlinks in the source dir fail to find config/config.mk| to comm-central (Bug 545594)
Port |Bug 509319 - Enable FIPS throws uncaught exception in toggleFIPS| to comm-central (Bug 548210)
Missing python version check in configure (Bug 548670)
Require python >= 2.4 to build Mozilla (and >=2.5 on Windows hosts) (Bug 427750)
Fix bsdiff linking for builds compiled with CROSS_COMPILE (Bug 535369)
Allow client.py network attempts to restart itself in case of failures (Bug 538528)
Package new layers library on shared builds (Bug 549390)
Hourly/Nightly builds should have some way to see which changeset was used (Bug 474610)
Platform :
mochitest-plain: test_domWindowUtils.html fails intermittently (Bug 513146)
Scrollbars are not being update using dss.enabled (Bug 546941)
vorbis_analysis_headerout calls oggpack_writeclear with uninitialized ogb if !v->backend_state (Bug 550184)
TM: Severe performance deterioration of String.match with complex regex (Bug 502058)
extend nsIINIParser to allow writing INI files (Bug 541594)
Update info should allow more html tags through (Bug 503505)
Integrate BrowserScope's HTML editor test suite with Mozilla's mochitest framework (Bug 550569)
file drop URIs only accidentally work (Bug 549349)
Comment out nsw.gov.au in PSL (Bug 547985)
nsPluginHost::TrySetUpPluginInstance() can return with the plugin instance owner holding a non initialized instance. (Bug 533030)
Hang [@ nsRegion::InsertInPlace] with position:fixed (Bug 541869)
Malian registrar (.ml) allows second-level domains (Bug 544319)
crash [@ nsHTMLAnchorElement::UnbindFromTree(int, int)] (Bug 540953)
Moving FILE_ILLEGAL_CHARACTERS from nsCRT.h to nsCRTGlue.h for frozen linkages (Bug 537967)
C++ style comment in C unit modules/plugin/default/unix/npunix.c (Bug 548213)
cp932 encoded messages display as garbage (Bug 542823)

New in SeaMonkey 2.0.3 (Feb 17, 2010)

Profile importer should not treat error as fatal when reading from Windows registry (Bug 537525)
Remove MSVC6 support from the tree (Bug 508760)
Perfolder unread e-mail count sometimes is wrong on a IMAP server (IMAP server, dovecot, supports CONDSTORE) (Bug 517461)
TB stores new fetched e-mails in Local Folders-1 after upgrade from tb2 to tb3(deferred_to_account is deleted, and the account/server number is used by "Smart Folders" of Tb3. Somehow directory for "Smart Folders" becomes "Local Folders-1") (Bug 534382)
offline folder size constantly increases using Exchange IMAP (Exchange returns wrong rfc822 size) - messages redownload (Bug 534835)
crash [@ nsMsgDBFolder::CallFilterPlugins(nsIMsgWindow*, int*)] (Bug 472019)
TB doesn't import messages with many recipients or large msg header from Outlook Express (Bug 484605)
Unable to get directory path for directories immediately under some symlinks (Bug 477010)
Windows SeaMonkey 2.0 is perma-orange on browser_ApplicationPrefs.js, since bug 504021 landing (Bug 541398)
symbol dumper behavior fails to include certain code blocks produced by PGO (some sections of functions missing in output) (Bug 526484)
[@ nsPop3IncomingServer::GetDeferredToAccount(nsACString_internal&)] Thunderbird will not start (Bug 541387)
topcrash:[@arena_chunk_init ] (Bug 515211)
The FAX dialog disappear and Fax cannot be done from Firefox, but works otherwise (Bug 440486)
edit message as new for messages with attachments corrupts heap (Bug 532693)
LDAP address book named with cyrillic/chinese letters doesn't work (Bug 532170)
Crash when visiting www.bicycling.com with JAWS 10 running (Bug 498913)
widget is not always able to initialise OLE (somehow triggered by various third party software e.g. McAfee Site Advisor, TortoiseHg) (Bug 525601)
Needs to package htmlpars.dll instead of gkparser.dll after bug 514665, in comm-central (apps) (Bug 528806)
Update Windows packaging for remaining dll renamings by bug 514665, in SeaMonkey (Bug 534410)
Port |Bug 485764 - Implement Windows System Proxy Settings Service| to SeaMonkey (Bug 534917)

New in SeaMonkey 2.0.2 (Jan 14, 2010)

New in SeaMonkey 2.0.1 (Jan 11, 2010)

New in SeaMonkey 2.0 Beta 2 (Sep 13, 2009)

New in SeaMonkey 1.01 (Apr 14, 2006)