The extension works as expected

Great Add-on...

Great addon. I had a similar addon in earlier additions of FF, before Mozilla made it obsolete. Only just installed this one but it works, and it's a great feature to have. If you want to see more than the last 10 closed tabls, follow the simple instructions in the setup options (most users can simply start using it without needing to do any set up).

It worked great, up until FF 72.0 dropped. Then, as always, without any consideration for the users and addon-creators, Mozilla broke this addon completely; the "Undo Closed Tab" menu item doesn't even appear in the right-click menu anymore.

Unfortunately, does not work on my FF 66.0b3 (64bit) portable Developer Edition: no for tabs in classic position, nor its on bottom, under the page. But with ordinary FF works o'k. Could you help me with the problem?

UPD Now works fine. FF 66.0b4
Thank's for helpful addon.

Wishes:
it would be great to have somehow separated and sorted full list of closed tabs from all opened windows.
And list of closed windows (or tabs from them, at least).
And saved "History" for few days.
Is it real?

great

Very good...

Big Thank you for this addon !! Works great with TST.
Merci beaucoup ! je retrouve cette possibilité avec cette nouvelle version de TST comme avant.
Simple et fonctionne bien.