As I was searching for new extensions I found this gem, itís called Tab Mix Plus and immediately installed it. Some of its highlights are the ability to add a second and third row of tabs instead of having to scroll left or right, and the expanded right click options to undo a deleted tab and see a list of recently closed tabs you can restore.
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 the ability to ad a second or third row of tabs. It also includes a full-featured session manager with crash recovery that can save and restore combinations of opened tabs and windows. Get Tab Mix Plus extension here.