The extension will automatically convert urls typed in text areas and obfuscate them replacing the http:// in hxxp:// when posting on forums; supported forums are phBB, invision and vBullettin but probably others already are because the check is only made on fields name and a lot use the same name attribute (like name="message" or name="post").

Also, the add-on automatically creates clickable links when hovering on a textual url with the mouse cursor. You can disable this through the preference window.

Additionally, a new interesting feature has been added, called SmartUrl, which is basically a very specialized version of AutoUrl. What it does is it recognizes url patterns for query strings and makes them clickable if some of the elements of the query string match with those in the URL of the current document.
To make things a bit more clear on how this last feature works: it's common in YouTube (I'm chosing YouTube as an example) to encounter comments that references other videos (that are on YouTube as well) in this form "Yes, this looks very similiar to: watch?v=AAAAAAA". The reasons for these kind of shortcuts are both to avoid being marked as spam and for readability/clarity of the message. Now with QuietUrl it is possible to just hover on that partial url and it will become clickable like every other AutoUrl generated urls.

What's New in This Release: [ read full changelog ]

· Fixed AutoUrl functionality. Now anchors get correctly created on extremely complex tag-mixed texts.
· Also updated to work around a small bug in Firefox 3.1b2 (signaled and being fixed right now).