Dormancy is a Firefox add-on that 'retires' the tabs that have gone unused for a while, thus freeing up that memory. Dormancy then restores the tabs to life when accessed.
While Firefox 9 adds restore-on-demand for users that restore their session by default, many users will never benefit from it.
Dormancy targets users who don't restore session, but do have long-running instances of Firefox and many tabs. This might land as a core feature in Firefox 9
Tabs are considered inactive when they haven't been selected in longer than 5 minutes. To change that, set this pref to a value in milliseconds:
Tabs are checked for inactivity every 5 minutes. To change this, set this pref to a value in milliseconds:
Dormancy is cross-platform and it works on Mac OS X, Windows and Linux.
· Firefox 12.0 and later
What's New in This Release: [ read full changelog ]
· Properly show unloaded tab titles (fix from @fhoech on Github - https://github.com/autonome/Dormancy/pull/3).