Portable SeaMonkey Changelog

What's new in Portable SeaMonkey 2.53.18.2

Mar 29, 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 Portable SeaMonkey 2.53.17.1 (Sep 22, 2023)

  • SeaMonkey 2.53.17.1 contains (among other changes) the following changes relative to SeaMonkey 2.53.17:
  • Upstream libwebp security fix bug 1852749.
  • CVE-2023-4863: Heap buffer overflow in libwebp bug 1852649.
  • Fix bad string encoded in ansi. l10n fr problem only bug 1847887.
  • SeaMonkey 2.53.17.1 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 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 2.53.17.1 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
  • SeaMonkey 2.53.17.1 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 115.3 and Thunderbird 115.3 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 Portable 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 Portable SeaMonkey 2.53.16 (Apr 3, 2023)

  • SeaMonkey 2.53.16 contains (among other changes) the following major changes relative to SeaMonkey 2.53.15:
  • No throbber in plaintext editor bug 85498.
  • Remove unused gridlines class from EdAdvancedEdit bug 1806632.
  • Remove ESR 91 links from debugQA bug 1804534.
  • Rename devtools/shim to devtools/startup bug 1812367.
  • Remove unused seltype=text|cell css bug 1806653.
  • Implement new shared tree styling bug 1807802.
  • Use `win.focus()` in macWindowMenu.js bug 1807817.
  • Remove WCAP provider bug 1579020.
  • Remove ftp/file tree view support bug 1239239.
  • Change calendar list tree to a list bug 1561530.
  • Various other updates to the calendar code.
  • Continue the switch from Python 2 to Python 3 in the build system.
  • Verified compatibility with Rust 1.66.1.
  • SeaMonkey 2.53.16 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 2.53.16 uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
  • SeaMonkey 2.53.16 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 102.9 and Thunderbird 102.9 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.

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

  • SeaMonkey 2.53.16 contains (among other changes) the following major changes relative to SeaMonkey 2.53.15:
  • No throbber in plaintext editor bug 85498.
  • Remove unused gridlines class from EdAdvancedEdit bug 1806632.
  • Remove ESR 91 links from debugQA bug 1804534.
  • Rename devtools/shim to devtools/startup bug 1812367.
  • Remove unused seltype=text|cell css bug 1806653.
  • Implement new shared tree styling bug 1807802.
  • Use `win.focus()` in macWindowMenu.js bug 1807817.
  • Remove WCAP provider bug 1579020.
  • Remove ftp/file tree view support bug 1239239.
  • Change calendar list tree to a list bug 1561530.
  • Various other updates to the calendar code.
  • Continue the switch from Python 2 to Python 3 in the build system.
  • Verified compatibility with Rust 1.66.1.
  • SeaMonkey 2.53.16 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 Portable 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 Portable SeaMonkey 2.53.15 Beta 1 (Dec 8, 2022)

  • Microtasks and promises bug.
  • Implement queueMicrotask()bug.
  • Remove old synchronous contentPrefService from the tree.
  • Remove remaining uses of 'general.useragent.locale'.
  • Migrate to intl.locale.requested.locale list from 'general.useragent.locale' bug.
  • Introduce a pref to store BCP47 locale list bug 1414390, bug 1423532 and bug.
  • Remove synchronous certificate verification APIs from nsIX509CertDB.
  • Taskbar preview's favicon appears blank bug.
  • Call Imagelibs decodeImageAsyncWindows using a callback bug.
  • Remove PermissionsService from process Windows sandboxing code bug 1788233.
  • Security info dialog doesn't show cert status anymore bug.
  • Replace nsIPlatfromCharset in mailnews bug.
  • Replace use of nsMsgI18NFileSystemCharset() with NS_CopyUnicodeToNative/NS_CopyNativeToUnicode() bug.
  • Cater for Outlook's/Hotmail's 'Deleted' folder bug.
  • Make some filter methods scriptable bug.
  • Fix crash in nsMsgFilterAfterTheFact::ApplyFilter() caused by async reset of 'm_curFolder' bug.
  • Localize messages from nsIMsgFolder.logRuleHitFail() bug.
  • Add logging of message filter runs and actions bug.
  • Check that we got a non-null header before running a filter on it (and crashing) bug.
  • With CONDSTORE, eliminate unneeded flag fetches at startup bug.
  • Fix so custom tags (keywords) are visible to all users bug.
  • Improve handling of tags on shared folders bug.
  • Allow setting/resetting junk marking by user for yahoo/aol to stick bug.
  • Don't check subject if spellchecker is not ready bug.
  • Grammar issues in mailnews_account_settings.xhtml bug.
  • Remove use of nsIMemory bug.
  • Replace obsolete GetStringBundleService call in SeaMonkey bug.
  • SeaMonkey crashes on MacOS Ventura 13.0 bug.
  • 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 Portable 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 Portable 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 Portable SeaMonkey 2.53.13 (Jul 11, 2022)

  • SeaMonkey 2.53.13 contains (among other changes) the following major changes relative to SeaMonkey 2.53.12:
  • Updates to devtools.
  • Updates to build configuration.
  • Starting the switch from Python 2 to Python 3 in the build system.
  • Removal of array comprehensions, legacy iterators and generators bug 1414340 and bug 1098412.
  • Adding initial optional chaining and Promise.allSettled() support.

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

  • If you are using NoScript you might encounter a certificate error when trying to download SeaMonkey from this site. NoScript tries to force an https connection for an http only site. It is not a NoScript problem but how the Mozilla server, from which downloads are delivered, is configured.
  • In this case please add download.cdn.mozilla.net to the NoScript "Never force secure (HTTPS) connections" options or turn off NoScript for this download only. The settings are located in the NoScript options under "Advanced->HTTPS".
  • This release includes official Linux and Windows builds for both x86 and x64 versions.

New in Portable SeaMonkey 2.53.12 (May 4, 2022)

  • SeaMonkey 2.53.12 contains (among other changes) the following major changes relative to SeaMonkey 2.53.11.1:
  • Format Toolbar forgets its hidden status when switching to other view modes bug 1719020.
  • Remove obsolete plugin code from SeaMonkey bug 1762733.
  • Fix a few strict warnings in SeaMonkey bug 1755553.
  • Remove Run Flash from Site permissions and page info bug 1758289.
  • Use fixIterator and replace use of removeItemAt in FilterListDialog bug 1756359.
  • Remove RDF usage in tabmail.js bug 1758282.
  • Implement 'Edit Template' and 'New Message From Template' commands and UI bug 1759376.
  • [SM] Implement 'Edit Draft' command and hide it when not in a draft folder (port Thunderbird bug 1106412) bug 1256716.
  • Messages in Template folder need "Edit Template" button in header (like for Drafts) bug 80280.
  • Refactor and simplify the feed Subscribe dialog options updates bug 1420473.
  • Add system memory and disk size and placeDB page limit to about:support bug 1753729.
  • The following bugs were fixed in our branch of the Gecko source code only:
  • Remove warning about missing plugins in SeaMonkey 2.53 and 2.57 bug 1755558.

New in Portable SeaMonkey 2.53.11.1 (Mar 28, 2022)

  • Fix edge case when setting IntersectionObserver threshold bug 1758291.
  • OAuth2 prefs should use realuserName instead of username bug 1518126.

New in Portable SeaMonkey 2.53.11 (Mar 3, 2022)

  • SeaMonkey 2.53.11 contains (among other changes) the following major changes relative to SeaMonkey 2.53.10.2:
  • Remove obsolete MOZ_EXTENSIONS check in suite bug 1749146.
  • Add connect button to cZ Networks Editor bug 1736443.
  • Remove freenode remnants from ChatZilla in SeaMonkey bug 1741082.
  • Prefer secure over insecure protocol in network list in ChatZilla bug 1744440.
  • Composer - Change tag textbox is not removed after use bug 1755369.
  • Clean up repo links in debugQA bug 1746790.
  • Fix misspelled references to macOS in suite bug 1749144.
  • Remove obsolete references to Java and Flash bug 1749141.
  • Help button not working in delete cert dialog bug 1750386.
  • Rearrange Message Filter Dialog to make room for new features bug 1735053.
  • Use Insert key as shortcut to create new message filters bug 1735055.
  • Rename some variables used in SeaMonkey's FilterListDialog to match Thunderbird's bug 1735056.
  • Implement Copy to New message filter functionality bug 1735057.
  • Add move to top / bottom buttons to message filters bug 1735059.
  • Add preference to not prompt for message filter deletion bug 1735061.
  • Clean up folder handling in FilterListDialog bug 1736425.
  • Add refresh function to Filter list dialog so that it can be updated when already open and new filters are added externally bug 1737450.
  • Use listbox rather than tree in FilterListDialog bug 1746081.
  • MsgFilterList(args) should take targetFilter and pass it to FilterListDialog bug 1753891.
  • Mail&News' start.xhtml: "We" link broken bug 1748178.
  • Add search functionality to filter dialog bug 1749207.
  • Move the taskbar refresh timer in SeaMonkey to idle dispatch bug 1746788.
  • Prevent subresource loads from showing the progress indicator on the tab in SeaMonkey bug 1746787.

New in Portable SeaMonkey 2.53.10.2 (Dec 28, 2021)

  • Obtain Windows code-signing certificate for SeaMonkey binary and update signing bug 1438084.
  • Support SHA-2 hashes in CertIDs in OCSP responses - port of bug 1746221.

New in Portable SeaMonkey 2.53.10.1 (Dec 13, 2021)

  • For SeaMonkey 2.53.10.1, the following extensions are included:
  • ChatZilla
  • DOM Inspector
  • Lightning
  • Beta versions also contain the following extension:
  • SeaMonkey Debug and QA UI

New in Portable SeaMonkey 2.53.10 (Nov 17, 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 Portable SeaMonkey 2.53.10 Beta 1 (Oct 30, 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 Portable SeaMonkey 2.53.9.1 (Sep 28, 2021)

  • Fix the lazy loading of images from some websites bug 1727967.
  • Move certain font family defaults from serif to sans serif bug 1727982.

New in Portable SeaMonkey 2.53.9 (Aug 26, 2021)

  • 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.

New in Portable 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 Portable SeaMonkey 2.53.8.1 (Jul 22, 2021)

  • What's New in SeaMonkey 2.53.8.1:
  • 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 Portable 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 Portable 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 Portable SeaMonkey 2.53.7 (Mar 30, 2021)

  • Remove Flash and NPAPI support bug 1688415.
  • Switch packaged extensions to be global bug 1659298.
  • Add Insert Forms to Composer bug 1684611.
  • Fix an issue with copying to IMAP sent folder and some reference count leaks in mailnews bug 1689890.
  • Tailing to delay tracker requests and enhance performance has been enabled bug 1358060.
  • Fix an issue with favorite and recent folders not showing in macOS bug 1695869.
  • Various security and general platform fixes.
  • The ChatZilla source has been integrated into SeaMonkey and no longer needs to be checked out separately if you build your own release bug 1551033.

New in Portable SeaMonkey 2.53.6 (Jan 22, 2021)

  • SeaMonkey 2.53.6 contains (among other changes) the following major changes relative to SeaMonkey 2.53.5.1:
  • Improve usability of multiple mailboxes/folders selectionbug 1600103.
  • Add Greek localisation (el).
  • Remove more RDF from mailnews code.
  • Switch to mozilla as topsrcdir and component for building is comm/suite now.
  • Rust support is now up to 1.48 and official build is now using 1.47.0
  • Various security and general platform fixes.

New in Portable SeaMonkey 2.53.6 Beta 1 (Dec 28, 2020)

  • Improve usability of multiple mailboxes/folders selectionbug 1600103.
  • Add Greek localisation (el).
  • Remove more RDF from mailnews code.
  • Switch to mozilla as topsrcdir and component for building is comm/suite now.
  • Rust support is now up to 1.48 and official build is now using 1.47.0
  • Various security and general platform fixes.

New in Portable SeaMonkey 2.53.5.1 (Nov 19, 2020)

  • Uses the same backend as Firefox and contains the relevant Firefox 60.8 security fixes.
  • 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.
  • Contains (among other changes) the following major changes relative to SeaMonkey 2.53.5:
  • Fix advertising of av1 support bug 1490877.
  • Various security and general platform fixes.
  • 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 2.53.5.1 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".

New in Portable 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 Portable 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 Portable SeaMonkey 2.53.4 (Sep 22, 2020)

  • Upgraded NSS to 3.53.1 bug 1643859.
  • Updated to Unicode 11 for SpiderMonkey bug 1466471.
  • Updated bundled Twemoji Mozilla font to v0.5.1 to support newer emojis bug 1644346.
  • Updated how photos are handled in the addressbook bug 1641705.
  • Removed outdated RSS feed handlers bug 1643716.
  • Fix initialisation of TodayPane mini-day, to show the right day bug 1479628.
  • Fixed sizing issue of HTML mail question (askSendFormat) dialog bug 1583415.
  • Update of help page content and links.
  • Various security and general platform fixes.

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

  • SeaMonkey 2.53.4 contains (among other changes) the following major changes relative to SeaMonkey 2.53.3:
  • Upgraded NSS to 3.53.1 bug 1643859.
  • Updated to Unicode 11 for SpiderMonkey bug 1466471.
  • Updated bundled Twemoji Mozilla font to v0.5.1 to support newer emojis bug 1644346.
  • Updated how photos are handled in the addressbook bug 1641705.
  • Removed outdated RSS feed handlers bug 1643716.
  • Fixed sizing issue of HTML mail question dialog.
  • Update of help page content and links.
  • Various security and general platform fixes.

New in Portable SeaMonkey 2.53.1 (Feb 28, 2020)

  • SeaMonkey 2.53.1 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.
  • Added Layout panel to CSS Grid tools.
  • TLS 1.3 is the default version now.
  • SeaMonkey 2.53.1 uses the same backend as Firefox and contains the relevant Firefox 60.3 security fixes.
  • SeaMonkey 2.53.1 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 72 and a few enhancements have been backported. We will continue to enhance SeaMonkey security in subsequent 2.53 beta and release versions as fast as we are able to.

New in Portable SeaMonkey 2.49.2 (Feb 16, 2018)

  • What's New:
  • SeaMonkey 2.49.2 contains (among other changes) the following major changes relative to SeaMonkey 2.49.1:
  • SeaMonkey 2.49.2 uses the same backend as Firefox and contains the listed Firefox 52.6 ESR security fixes.
  • SeaMonkey 2.49.2 shares most parts of the mail and news code with Thunderbird. Please read the Thunderbird 52.6 ESR release notes for specific changes and security fixes in this release.
  • SeaMonkey-specific changes:
  • You were unable to add or edit properties for images and links in the 2.49.1 Composer. The problem, tracked in bug 1417819, has been fixed. We are sorry for the inconvenience it caused.
  • SeaMonkey now uses gtk3 on Linux. If you experience a problem because of this please file a bug and link it to Switch Linux builds to GTK3 with SeaMonkey 2.49. Pleae try another OS theme first. Some of them are buggy and cause problems with SeaMonkey, Thunderbird and Firefox.
  • With some Linux themes, the menulist- and history-dropmarker didn't show. It was actually there but only 1 pixel wide. The problem, tracked in bug 1331208, has been fixed. As a result the dropmarker in the location bar is now also shown a little wider under Windows.
  • Scrollbars didn't show the buttons under Linux. The problem, tracked in bug 1269145, has been fixed. We will try to improve the visual experience in a follow-up version.
  • WebRTC has been disabled by default. It needs an add-on to enable it per site. See the webrtc-permissions-ui-toggle add-on.
  • The active title bar was not visually emphasized under Linux or using the Windows XP/Vista/7 Classic theme. We opted to show it with a striped color bar in bug 1398973.
  • For security, parts of bug 1035091 were ported in bug 1411708. This might cause problems with add-ons like Stylish which use moz-document. Set the pref "layout.css.moz-document.content.enabled" to "true" to overcome this but be aware that this disables the added security fix.

New in Portable SeaMonkey 2.48 (Aug 10, 2017)

  • The following extensions are removed and are not included in the distribution (due to repack issues):
  • Chatzilla
  • DOM Inspector DOM Inspector 2.0.16.1 available on the Mozilla Add-Ons page is not compatible with SeaMonkey 2.48. Please use version 2.0.17.0 provided by Adrian Kalla.
  • Lightning
  • SeaMonkey-specific changes:
  • The bug which prevented you to set the default search engine in SeaMonkey 2.46 has been fixed. If you see any problems with this please report it in bug 1265881.
  • Troubleshooting Information in "about:support" is displayed in a better readable layout.
  • Language support for be, ca, fi, gl, nb-No, tr and uk has been dropped because the languages are no longer updated for SeaMonkey.
  • Developer Notes:
  • The Error Console is now a part of SeaMonkey. It was replaced by the Developer Tools Web and Browser Console in Firefox which both are also available in SeaMonkey. If you use css to style the console please note that it is now located in "chrome://communicator/content/console/console.xul/".
  • The Help Viewer is now a part of SeaMonkey and has been deleted from Mozilla Gecko.
  • SeaMonkey now uses the HTTP cache v2. For technical details please check bug 1241622.
  • 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 2.48 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.
  • SeaMonkey 2.46 is the first version which bundled the Firefox developer tools as a replacement.
  • Known issues:
  • If you experience a hang and/or get a message box that a script is busy when opening the Data Manager try deleting the webappsstore.* files from your profile folder when SeaMonkey is not running. These contain data stored by web sites and will be recreated during the next start. If you are unsure if the information is needed please back them up before deleting them. The problem is tracked in bug 1305624 but so far no coding error has been found.
  • Changes in the Mozilla password prompting code caused an incompatibility and you may no longer be prompted for authentication in certain scenarios. The problem is tracked in bug 1347857. Check the bug for workarounds. The issue will be fixed in the next SeaMonkey release.
  • If your are running Windows 7 or lower "Send to > Mail recipient" might not work. The problem was originally reported against Thunderbird 52 and is tracked in bug 1356902. As a workaround install the Microsoft Visual Studio 2015 or 2017 redistributable runtime library. SeaMonkey is compiled for x86 so you only need this version VS2017 x86 runtime. The runtime can be installed on any Windows version starting with Windows XP SP3. If you already have a VS2015 runtime installed you do not need to upgrade it to a later version.
  • The SSL 3.0 encryption protocol is no longer supported due to security concerns (bug 1106470). Legacy websites may still rely on it and will not work with the newer TLS 1.x protocols. Contact the website administrator to update their server to resolve the issue at the source.
  • The Remember Passwords add-on breaks password handling. Please disable or uninstall this add-on using the Add-ons Manager.
  • You cannot set up a new Sync account or pair a device anymore (bug 998807).
  • Data loss warning: If you use a profile with this or any later version and then try to go back to SeaMonkey 2.40 or earlier, SeaMonkey will rename your history file to places.sqlite.corrupt and create a new places.sqlite file, effectively resetting your browsing history. This is because the internal format changed and the upgrade process only works in one direction. Additionally, running MailNews with local folders and POP3 mail filters may produce summary files that are not correctly read by previous versions of SeaMonkey. If you decide to go back to a previous version of SeaMonkey, you should delete the .msf files for your local folders and POP3 accounts or repair the folders using the folder properties dialog in order to avoid potential data loss.
  • After creating a news account through clicking a news URL, the MailNews account wizard may be broken (the account type will always be News). To work around the problem, set the mail.server.serverX.valid pref (where X is the internal number of the corresponding news account) to true in about:config, or delete the invalid news account (bug 521861).
  • Web pages may appear differently in the MailNews feed reader than in the browser (bug 662907). Workaround: Add a "noscript {display:none}" rule to your userContent.css (note that the Stylish add-on cannot be used here since it does not integrate with the MailNews feed reader).
  • Lightning keyboard shortcuts for accessing the calendar tab from within the MailNews window or from the main menu (Ctrl+Shift+C/D) do not work. (bug 514512).
  • If you try to start SeaMonkey using a locked profile, it will crash (see bug 573369).
  • Mac OS X and Windows: Citrix Receiver no longer works. As a workaround, mark the plugin as Always Enable in the Add-ons Manager (see bug 1025627).
  • Windows:
  • Norton/Symantec anti-virus scanners may report that some parts of SeaMonkey (e.g. the file freebl3.dll) are suspicious. If you downloaded SeaMonkey from one of the official download sites, this is a false alarm. You might experience problems with secure websites when this happens. To fix the issue, instruct your anti-virus software to ignore these files (and move them out of quarantine) and/or switch to another anti-virus software and reinstall SeaMonkey.
  • Fixed issued compared to SeaMonkey 2.48 Beta 1:
  • The code has been updated to include the latest Firefox 51 fixes.
  • Geolocation notification prompting was broken and has been fixed in bug 1368277
  • A minority of our testers reported a crash when sending or replying to emails starting with SeaMonkey 2.48. This is tracked in bug 1308923 and was fixed in bug 1364977 for SeaMonkey. The original bug is still open but additional cases are likely caused by add-ons.
  • A crash after archiving messages has been fixed in bug 1314347

New in Portable SeaMonkey 2.46 (Jul 26, 2017)

  • SeaMonkey-specific changes:
  • HTML5 fullscreen video (e.g. on YouTube) now works fine.

New in Portable SeaMonkey 2.39 (Nov 9, 2015)

  • 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 2.39 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 Portable SeaMonkey 2.38 (Sep 28, 2015)

  • 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 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 Portable SeaMonkey 2.33.1 (Mar 24, 2015)

  • Fixed bugs:
  • Bug 1144988 - Don't let other pages to load while doing scroll-to-anchor.
  • Bug 1142552 - Update robocop chunking to fix rc10.
  • Bug 1113460 - Bump mozharness.json to revision 75c435ef19ca.
  • Bug 1142459 - Fix mixed content shield notification broke by bug 1140830.
  • Bug 1118216 - Stop recycling Message instances, as it's unnecessary.

New in Portable SeaMonkey 2.33 (Mar 17, 2015)

  • SeaMonkey-specific changes:
  • Security notification bars now feature tracking controls.
  • The tracking/privacy preferences pane has been updated.
  • Mozilla platform changes:
  • The Flash protected-mode sandbox has been disabled on Windows in order to evaluate the stability impact of protected mode.
  • Insecure RC4 ciphers are no longer accepted whenever possible.
  • Certificates with 1024-bit RSA keys have been phased out.
  • A subset of the Media Source Extensions (MSE) API has been implemented in order to allow native HTML5 playback on YouTube. Full support is on the way.
  • The performance of the new ES6 generator functions has been improved.
  • Also see Firefox 36 for Developers.
  • Fixed several stability issues.
  • Bugs fixed in this release:
  • SeaMonkey bugs
  • Thunderbird bugs (including both shared MailNews- and Thunderbird-only bugs)

New in Portable SeaMonkey 2.32.1 (Feb 7, 2015)

  • MailNews feeds not updating
  • Selected profile in Profile Manager not remembered
  • Opening a bookmark folder in tabs on Linux
  • Troubleshooting Information (about:support) with the Modern theme

New in Portable SeaMonkey 2.32 (Jan 15, 2015)

  • Fixed bugs:
  • Bug 1064002 - Fix removal of --log-raw from xpcshell.
  • Bug 1110229 - Always paint the full low-res tile for performance and correctness.
  • Bug 1117140 - Avoid allocating some resources in the gmp child process which we have no use for.
  • Bug 1110760 - Build and Package Chromium Sandbox wow_helper.
  • Bug 1110760 - Increase the chances of the wow_helper target code symbols being in the assumed order.
  • Bug 1110760 - Import Chromium Sandbox wow_helper code.
  • Bug 1119189: start listening to room events regardless of throttle settings.
  • Bug 1076975 - Avoid serializing blobs when passed between threads in the same process.
  • Security fixes:
  • 2015-09 XrayWrapper bypass through DOM objects
  • 2015-08 Delegated OCSP responder certificates failure with id-pkix-ocsp-nocheck extension
  • 2015-06 Read-after-free in WebRTC
  • 2015-05 Read of uninitialized memory in Web Audio
  • 2015-04 Cookie injection through Proxy Authenticate responses
  • 2015-03 sendBeacon requests lack an Origin header
  • 2015-02 Uninitialized memory use during bitmap rendering
  • 2015-01 Miscellaneous memory safety hazards (rv:35.0 / rv:31.4)

New in Portable SeaMonkey 2.30 (Oct 17, 2014)

  • Mozilla platform changes:
  • OMTC has been enabled by default on Windows.
  • OpenH264 support (sandboxed) has been added.
  • A new CSP backend was implemented.
  • Support for connecting to HTTP proxies over HTTPS was implemented.
  • Improved reliability of the session restoration.
  • WebCrypto support has been enhanced: Added RSA-OAEP, PBKDF2 and AES-KW support, implemented wrapKey and unwrapKey, enabled import/export of JWK-formatted keys.
  • Also see Firefox 33 for Developers.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.29 (Sep 9, 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 Portable SeaMonkey 2.26 (May 3, 2014)

  • SeaMonkey-specific changes:
  • The delimiter for forwarded messages can now be configured.
  • An option to not strip signatures on reply has been added to prevent top signatures from deleting the body.
  • See the changes page for a more complete overview.
  • Mozilla platform changes:
  • The Gamepad API has been finalized and enabled (learn more).
  • navigator.plugins is no longer enumerable, for user privacy.
  • ECMAScript Internationalization API has been enabled.
  • 'box-sizing' (dropping the -moz- prefix) has been implemented.
  • SharedWorker is now enabled by default.
  • CSS3 variables have been implemented.
  • Console object is now available in Web Workers.
  • Promises have been enabled by default.
  • has been implemented and enabled.
  • has been implemented and enabled.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.25 (Mar 21, 2014)

  • SeaMonkey-specific changes:
  • Newsgroup names can now be entered using autocompletion.
  • See the changes page for a more complete overview.
  • Mozilla platform changes:
  • The Gamepad API has been finalized and enabled (learn more).
  • VP9 video decoding has been implemented.
  • Support for Opus in WebM was added.
  • Volume control for HTML5 audio/video has been added.
  • Mac OS X Notification Center support has been added for web notifications.
  • Support for spdy/2 has been removed.
  • Support for multi-line flexbox in layout has been added.
  • Support for the MathML 2.0 mathvariant attribute has been added.
  • Background thread hang reporting has been added.
  • has been implemented and enabled.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.24 (Feb 7, 2014)

  • SeaMonkey-specific changes:
  • Implemented an option to thread messages received by date.
  • Allowed deletion of news posts by default.
  • Implemented optional taskbar preview-per-tab.
  • Added support (permission prompt) for desktop notifications.
  • Added Isn't operator for searching by Priority.
  • See the changes page for a more complete overview.
  • Mozilla platform changes:
  • Support for new scrollbar style on Mac OS X 10.7 and newer.
  • Accessibility related improvements on using pinned tabs (bug 577727).
  • Major SVG rendering improvements around Image tiling and scaling (bug 600207).
  • Removed support for sherlock files that are loaded from application or profile directory.
  • Support for W3C touch events disabled (bug 888304).
  • Fixed several stability issues.

New in Portable SeaMonkey 2.23 (Dec 13, 2013)

  • SeaMonkey-specific changes:
  • Download progress is now shown in the Mac OS X app dock icon.
  • EXIF orientation is now being used when displaying attached images in MailNews.
  • "This folder is being processed... to get messages." alerts on active MailNews folders now identify the account or folder.
  • MailNews notifications have a new look.
  • See the changes page for a more complete overview.
  • Mozilla platform changes:
  • All plugins, with the exception of recent Flash plugins, now default to click-to-play.
  • The password manager now supports script-generated password fields.
  • Support for MP3 decoding on Windows XP has been added, completing MP3 support across Windows OS versions.
  • The CSP implementation now supports multiple policies, including the case of both an enforced and Report-Only policy, per the spec.
  • There is no longer a prompt when websites use appcache.
  • Support for the CSS image orientation property has been added.
  • IndexedDB can now be used as an "optimistic" storage area so it does not require any prompts and data is stored in a pool with LRU eviction policy, in short temporary storage.
  • When displaying a standalone images, the EXIF orientation information contained within the JPEG image is now matched (bug 298619).
  • Page load times have been improved due to no longer decoding images that are not visible (bug 847223).
  • Fixed several stability issues.

New in Portable SeaMonkey 2.22.1 (Nov 20, 2013)

  • Spell check sometimes did not work when typing in MailNews
  • Some pages only loaded/rendered when moving the mouse

New in Portable SeaMonkey 2.22 (Nov 20, 2013)

  • SeaMonkey-specific changes:
  • Sorting messages by date can now be configured to look at the thread root instead of the newest message in it (pref: mailnews.sort_threads_by_root).
  • Plugins doorhangers now allow to activate different plugin types independently.
  • The proxy popup is now also available from the MailNews main window.
  • A new Recipients column has been added that shows all recipients (To, CC, BCC).
  • The default HTML5 audio/video player controls allow to change the playback rate now.
  • A "Validate this page" entry has been added to Tools/Web Development.
  • The Firefox devtools debugger can now be used to debug SeaMonkey remotely.
  • Mozilla platform changes:
  • Web Audio support has been added.
  • CSS3 background-attachment:local support to control background scrolling has been implemented.
  • Many new ES6 functions have been implemented.
  • iframe document content can now be specified inline.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.21 (Sep 19, 2013)

  • SeaMonkey-specific changes:
  • Implemented an option to thread messages received by date.
  • Allowed deletion of news posts by default.
  • Implemented optional taskbar preview-per-tab.
  • Added support (permission prompt) for desktop notifications.
  • Added Isn't operator for searching by Priority.
  • See the changes page for a more complete overview.
  • Mozilla platform changes:
  • Accessibility related improvements on using pinned tabs (bug 577727).
  • Major SVG rendering improvements around Image tiling and scaling (bug 600207).
  • Removed support for sherlock files that are loaded from application or profile directory.
  • Support for W3C touch events disabled (bug 888304).
  • Fixed several stability issues.

New in Portable SeaMonkey 2.20 (Aug 8, 2013)

  • The zoom in/out cursor did not appear when hovering images (bug 901222).

New in Portable SeaMonkey 2.19 (Jul 4, 2013)

  • SeaMonkey-specific changes:
  • Mark -> As Read now checks the state of all selected messages instead of only the first one's.
  • Notifications for mixed content blocker have been implemented.
  • A new 3rd-party cookie restriction to visited websites option has been added to the Cookies pref pane.
  • The context menu Search option is now available for textareas and input fields.
  • Website storage mechanisms are now available in the Data Manager (localStorage, indexedDB, etc.).
  • "Open Containing Folder" is now already available during download.
  • See the changes page for minor changes.
  • Mozilla platform changes:
  • asm.js optimizations (OdinMonkey) have been enabled for major performance improvements.
  • Improved WebGL rendering performance through asynchronous canvas updates.
  • Plain text files displayed within the browser will now word-wrap.
  • For user security, the Components object is no longer accessible from web content.
  • Improved memory usage and display time when rendering images.
  • The Pointer Lock API can now be used outside of fullscreen.
  • CSS3 Flexbox has been implemented and enabled by default.
  • The new Web Notifications API has been implemented.
  • Added clipboardData API for JavaScript access to a user's clipboard.
  • Support for new HTML5 and elements has been added.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.17.1 (Apr 15, 2013)

  • UNC path handling issues were fixed on Windows (bug 846848).
  • SPNEGO/MS KRB5 had stopped working; NTLM SSP was tried instead (bug 857291).
  • Click-to-play no longer respected per-site permissions (bug 854867).

New in Portable SeaMonkey 2.17 (Apr 4, 2013)

  • More security fixes.

New in Portable SeaMonkey 2.16.2 (Mar 14, 2013)

  • Fixed a regression introduced in 2.16.1 relating to strings. Most prominent in some locales with portions of SeaMonkey unuseable.

New in Portable SeaMonkey 2.16.1 (Mar 11, 2013)

  • Windows 8 only: Fixed stability issue for some AMD Radeon HD graphics cards.
  • Fix for MFSA 2013-29 (CVE-2013-0787)

New in Portable SeaMonkey 2.16 (Feb 22, 2013)

  • Reply to List is now supported
  • SSL-related warning prompts (leaving or entering a secure site, viewing mixed content) have been replaced by less intrusive, non-modal notification bars

New in Portable SeaMonkey 2.15.1 (Jan 22, 2013)

  • Problems involving HTTP proxy transactions have been fixed (bug list).

New in Portable SeaMonkey 2.15 (Jan 10, 2013)

  • Major Changes:
  • SeaMonkey can set the desktop wallpaper and be set as default client/browser on Mac now (bug 433254).
  • SeaMonkey can be set as default client/browser on Linux now (bug 783908).
  • Fixes:
  • Draft messages saved in offline mode could disappear (bug 805626).
  • The presence of the X-GM-EXT-1 capability is now used to identify the Gmail IMAP server (bug 798663).
  • Messages could get corrupted after running filters (bug 815012).
  • Adding a failed favicon produced an error (bug 792735).
  • The IMAP account option "Synchronize the most recent" was not saving correctly (bug 804091).
  • Click-to-play was broken on various websites like cnn.com or latimes.com (bug 813963).
  • Add-ons can now overlay the plugin preview for specific MIME types (bug 812898).
  • Not detecting feed when type has leading and/or trailing whitespace (bug 484379).
  • The Select Addresses dialog came up blank if opened from a Compose window with a single To/Cc/Bcc field filled in (bug 814770).
  • A change to the User Agent string has been reverted since it caused some website incompatibilities (bug 816749).
  • Information failed to show on the message header pane under certain circumstances (bug 803322).
  • The display quality of fonts could be perceived as bad when Cleartype was turned off on Windows (bug 814101).
  • The permissions database was not read completely if it included an invalid entry (bug 814554).
  • supports has been disabled for now (bug 814310).
  • Information failed to show on the message header pane under certain circumstances (bug 803322).
  • On the Junk Settings pane of Account Settings, UI elements now get disabled based on the controlling radio selector and checkbox (bug 725488).
  • Copied bookmarks erroneously inherited annotations (special folder flags) (bug 755758).
  • Initial send in background support has been added (pref mailnews.sendInBackground is off by default) (bug 789865).
  • A Global Addressing Preferences button has been added to the Composition & Addressing pane of Account Settings (bug 788429).
  • In Account Settings / Server Settings, Server and User Name now expand with the window (bug 545194).
  • The input box in the News "Download headers" dialog allowed entering non-numeric characters (bug 795097).
  • Custom font selections on the Mail & Newsgroups Composition pref pane failed to show properly (bug 529418).
  • Other Languages has been renamed to Unicode on the Fonts pref pane (bug 789724).
  • A Global Junk Preferences button has been added to the Junk Settings pane of Account Settings (bug 551827).
  • An identity can now be set as the default in the identity list editor of Account Settings (bug 314806).
  • Trying to use invalid file system folders as the Local Directory for mail storage now triggers a warning (bug 577775).
  • The Enter key adds a new criteria line in the filter editor now (Ctrl+Enter accepts the dialog) (bug 49474).
  • Feeds had issues with folder names containing a percent sign (bug 787729).
  • The dom.identity.enabled pref was missing from about:config (bug 787873).
  • Add-ons were not listed when resetting Sync (bug 787802).

New in Portable SeaMonkey 2.14 (Nov 22, 2012)

  • JavaScript Maps and Sets are now iterable.
  • SVG FillPaint and StrokePaint have been implemented.
  • The sandbox attribute has been implemented for iframes, enabling increased security.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.13.2 (Oct 29, 2012)

  • Security fixes.
  • Edited contacts could not be saved if the address book contained lists
  • Local IMAP mail files could grow excessively

New in Portable SeaMonkey 2.13.1 (Oct 15, 2012)

  • Security fixes

New in Portable SeaMonkey 2.13 (Oct 11, 2012)

  • Sniffing for feeds could lead to a crash
  • The Bookmarks Manager Tools/Import HTML wizard had stopped working
  • Bookmarks could get deleted and reset to default if bookmarks-*.json were deleted
  • Selecting multiple PGP/MIME encrypted messages could lead to a crash
  • Compacting folders could prevent the MailNews database cache from getting filled

New in Portable SeaMonkey 2.12 (Aug 30, 2012)

  • Added support for SPDY networking protocol v3.
  • Implemented WebGL enhancements, including compressed textures for better performance.
  • Optimized memory usage for add-ons.
  • Implemented the CSS word-break property.
  • Implemented high precision event timer.
  • HTML5: Added native support for the Opus audio codec.
  • HTML5: Added support for the source element media attribute.
  • HTML5: Added support for the audio element and video element played attribute.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.11 (Jul 18, 2012)

  • SeaMonkey-specific changes
  • A click-to-play option (off by default for now) has been implemented for plugins.
  • Mozilla platform changes:
  • The Pointer Lock API has been implemented.
  • A new API to prevent your display from sleeping is available.
  • New text-transform and font-variant CSS improvements have been made for Turkic languages and Greek.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.10.1 (Jun 19, 2012)

  • The new minimum supported Windows version is now XP SP2 (bug 723316), Windows 2000 support has been dropped (bug 730211).
  • Flash 11.3 sometimes caused a crash on quit on Windows (bug 747683).
  • A fatal XPCOMGlueLoad error could be experienced on Linux during startup (bug 762621).
  • Saving a local message as .txt or .html could fail on Windows (bug 763319).
  • Move Bookmarks (Bookmark Manager Edit menu) did not work anymore (bug 762824).
  • Livemarks (feed bookmark folders) did not update anymore (bug 730837).

New in Portable SeaMonkey 2.10 (Jun 7, 2012)

  • SeaMonkey-specific changes:
  • The domain name is highlighted in the location bar by default now, configurable in Preferences.
  • The amount of tabs to be restored concurrently can be configured in Preferences now.
  • News username and password auth dialogs have been combined and show for which server the prompt is now.
  • Mozilla platform changes:
  • The new minimum supported Windows version is now XP SP2, Windows 2000 support has been dropped.
  • The SPDY protocol now enabled by default for faster browsing on supported sites
  • The column-fill CSS property has been implemented.
  • Experimental support for ECMAScript 6 Map and Set objects has been implemented.
  • Support for the CSS3 background-position property extended syntax has been added.
  • The :invalid pseudo-class can now be applied to the element.
  • The CSS turn unit is now supported.
  • Fixed several stability issues.

New in Portable SeaMonkey 2.9.1 (May 2, 2012)

  • Bookmark edit panels did not expand correctly
  • POP3 filters that moved new message to IMAP folders mostly did not work
  • The body of messages in sub folders was not loaded when using "Fetch Headers Only"
  • Messages received with the Movemail account could contain parts of other messages
  • New mail notification had issues since the previous release
  • MailNews would crash occasionally at startup

New in Portable SeaMonkey 2.9 (Apr 26, 2012)

  • SeaMonkey-specific changes:
  • The File and Move Bookmarks dialogs are resizable now.
  • HTML5 videos that do not start automatically show a large play button now.
  • Add-ons Sync can now be configured without the Add-ons Sync Prefs add-on.
  • Pasting a URL from the clipboard into the Download Manager window will download it.
  • Plugins can be disabled for the whole suite now in addition to Mail & Newsgroups only.
  • Mozilla platform changes:
  • View Source now has line numbers.
  • Line breaks are now supported in the title attribute.
  • Find in Page search results are scrolled into view now.
  • The column-fill CSS property has been implemented.
  • Support for the text-align-last CSS property has been added.
  • Experimental support for ECMAScript 6 Map and Set objects has been implemented.
  • Fixed several stability issues.
  • The changes page lists a more detail

New in Portable SeaMonkey 2.8 (Mar 21, 2012)

  • SeaMonkey-specific changes:
  • Support for migrating from old profiles (before SeaMonkey 2.0) has been dropped (bug 689437).
  • Mozilla platform changes:
  • New Add-ons Sync engine (install the Add-ons Sync Prefs add-on to enable it in Preferences).
  • The CSS text-size-adjust property is now supported.
  • The outerHTML property is now supported on HTML elements.
  • View source syntax highlighting now uses the HTML5 parser (see bug 482921).
  • SPDY protocol support for faster page loads is now testable.
  • XMLHttpRequest now supports HTML parsing.
  • Files can now be stored in IndexedDB (see bug 661877).
  • Websockets has now been unprefixed.
  • Redesigned media controls for HTML5 video.
  • Standalone images are now rendered against a dark gray background (install the Old Default Image Style add-on to revert this).
  • Fixed several stability issues.

New in Portable SeaMonkey 2.0.2 (Jan 14, 2010)

  • A problem with freezes entering addresses in email compose is now fixed, but OE Contacts are not used for autocompleting addresses right now. (Bug 535528)
  • A problem with NTLM authentication was fixed.