Not so long ago, Mozilla announced a Firefox update policy change that led Ubuntu developers to review how Firefox is updated in Ubuntu.
Basically, Mozilla is updating Firefox more frequently and pushing some feature changes as minor updates. For example, Firefox 3.7 would bring a new feature that prevents the browser from crashing when viewing Flash and Silverlight video content. This is achieved by isolating the plugin execution in a new process, instead of executing it as part of firefox-bin. It is a great feature. Anyway, this will no longer be a new feature in Firefox 3.7. Instead, Mozilla pushed this feature to Firefox 3.6.4 (currently at the release candidate stage) and Firefox 3.7 will become Firefox 4. Additionally Mozilla is now dropping support for Firefox 3.
There was a lot of discussions here in the forums when the blueprint became public, but I guess most of us mortals didn't know for sure when this would happen and if this would also be applied to Hardy and Jaunty. This is particularly important, since these Ubuntu releases already reached the last version of Firefox 3.x series.
Well, the wait is over. According to this announcement in TheFridge, Firefox 3.6.4, which will be released next week, will be rolled out to Hardy, Jaunty, Karmic and obviously Lucid.
Any Hardy user interested in testing the new version should read the original announcement and these instructions. It is strongly advised to use a Virtual Machine or a new separate Ubuntu installation. Do not use it on a production environment.
Testing versions for Jaunty and Karmic will be available soon.
I would like to thank wojox, who spotted the original announcement and sent me a PM. I apologize to the moderators if this is considered a double-post-like thread, but I thought it would interesting to share this info on the Community Cafe.