What is Tab Mix Plus?
Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager with crash recovery that can save and restore combination of opened tabs and windows.
Tab Mix Plus Screenshots
Tab Mix Plus Features
Tab Mix Plus information
Comments and Reviews
Said about Tab Mix Plus as an alternative
Nothing has made a bigger difference to me than Tab Mix Plus for make browsing tolerably acceptable. I had to switch to PaleMoon when Firebird>Firefox went their new direction. Someone explained that XUL-based off-shoots of Firefox can still use TabMixPlus. (PaleMoon and WaterFox.)
It is an all in one Tab Management Tool. I wish it was still supported and available for firefox 57+