I have been using it (or similar) for years. It has been disabled...along with every other Extension and Theme in Firefox...since Firefox demanded I upgrade to latest version. I AM at the latest version...111.0.1 64 bit...and see no way to upgrade. In fact, the settings will not allow automatic updates...saying they've been disabled by administrator. Well...I AM the administrator. (Linux Mint 21)
Kind of a kick in the goolies. and a pain. Oh well. I know the HTML code so it's not a deal breaker.
I'm on linux mint... I primarily run brave, but I just did the upgrade firefox on it
I did
run synaptic package manager
search for firefox
clicked on firefox, then in the menu bar, did package->force version, then let it install 136.0.1+linuxmint1+virginia
on my system, then went back into addons and re-enabled ublock, which was the only thing I was running
if you're paranoid, you can backup bookmarks and stuff before you do the upgrade