None of my addons are working.
The icons for the addons disappeared from the status bar, and I can't use any of them, but they still appear in the addons window.
Alle svar (1)
You can delete the files extensions.* (extensions.rdf, extensions.cache, extensions.ini, extensions.sqlite) and compatibility.ini in the Firefox profile folder to reset the extensions registry. New files will be created when required.
See "Corrupt extension files": http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
If you see disabled extensions that are not compatible on the next start in "Tools > Add-ons > Extensions" then click the "Find Updates" button to do a compatibility check.
You may also need this: http://kb.mozillazine.org/Corrupt_localstore.rdf