I've spent most of the day fiddling with Firefox, finding replacement addons for ones that no longer work.

I've spent most of the day fiddling with Firefox, finding replacement addons for ones that no longer work. The two biggest gaps are proper replacements for TAB MIX PLUS and THEME & FONT CHANGER.

I found a couple of addons that do some of the things the first does (bring up a list of recently closed tabs, and save sets of tabs to bookmarks), but the big thing about the Font & Theme changer was being able to change the size of the fonts on the menu (yes, I still prefer a menu) and the toolbars. The workaround I found does that, but damnit, why don't they have a UI SCALE slider, like they do in SecondLife/Opensim viewers?!
https://support.mozilla.org/en-US/questions/1184537