We’re always looking for new ways to improve Firefox. Part of that process sometimes means that we need to remove features that aren’t used very much or support for platforms that are going away. This lets us concentrate our resources on finding new ways to delight Firefox users.
As part of this ongoing process, we are now removing Tab Groups from Firefox for Windows, Mac and Linux. Users who want to keep this functionality can do so through add-ons that offer an identical functionality, explained here.
In Firefox for Android we are ending support for rarely used versions of the Android operating system. We have stopped support for Android OS version 3.0 through 3.2.6 (Honeycomb) and will soon end support for 2.3–2.3.7 (Gingerbread). Users can learn about versions of Android Firefox supports here.
We’ve tried to minimize any inconvenience for the few users affected by these changes. As always, please visit our Feedback Page to share your thoughts.