Conversation

Did your #Firefox just crash and wipe disable most of your add-ons? Same!

Temporary fix that worked for me (use at your own risk):

1. Paste "about:config" in the URL bar
2. Accept the risk!
3. In the search bar on resulting page, paste
xpinstall.signatures.required

4. Click "true" so that it changes to "false". Leave it as "'false".
5. Restart Firefox

more here: https://www.reddit.com/r/firefox/comments/bkfg00/also_had_all_my_addons_disabled_and_cant/emgdduw/

h/t @zacanger