One of the very few add-ons that has lived for over a decade.

Numerous rewrites and hurdles will never deter the dedication. What can I say, I'm very bias in this review. it's currently lacking numerous features and it's a watered down version ... but it's back baby.

For the time being there is:
FoxyTab (https://addons.mozilla.org/en-US/firefox/addon/foxytab/) which covers Tab Manipulation like Duplicate, Merge windows, Reload every x and some of its own not found the original. There's no 'undo closed tab history', or mouse events unfortunately.