It was inevitable, really, when they went all SJW on us, but Firefox has been going downhill for a long time. Most recently there’s been the ‘I’m going to use all your CPU for no reason’ bug where the ‘Web Content’ process would start maxing out all cores on the machine until it was restarted.
Today, though, they’ve decided to disable all addons because, well, why not?
In case you’re wondering, the workaround is to go to about:config and set xpinstall.signatures.required to false. But set it back if Mozilla ever becomes more concerned with producing software than ‘diversity’.
Why do I still use it? Basically because it’s the default on most Linux distros and because of NoScript. I’m mostly waiting for Brave to be officially supported on Linux before I switch.