When I was forced out of 52.9.0 ESR, My tab groups addon (the only reason I use firefox) was disabled. Looking at the current state of Firefox, some new addons have the potential to fill the old requirement. The problem is, I can't do that without my old tabs. According to https://support.mozilla.org/en-US/kb/tab-groups-removal, I should have a bookmarks folder with the old tabs in their groups. I do not. In fact, my current tabs seem to be from May! I assume that's when I was first forced out of the old firefox and into the new. Not only that, manually installing the old version and trying to grab old data back, has proven useless, as the addon is disabled there, too for some reason. I can't even see if restarting would work because it automatically updates to 60 ESR regardless of the option set to not update. Who in mozilla decided that it would be a good idea to force a major, addon-breaking update on EXTENDED SUPPORT RELEASE users regardless of support end date? Just let us live with our eventually-insecure product. It's better than a useless one.