I'm running Firefox 3.6.13. Add-ons say will be installed when Firefox is restarted but they don't install. What is the problem?
I also have a few add-ons that aren't compatible with my current version of Firefox, and they say they will be un-installed when Firefox restarts, but they still stay on the add-ons list.
I also have a few add-ons that aren't compatible with my current version of Firefox, and they say they will be un-installed when Firefox restarts, but they still stay on the add-ons list.
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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, not compatible, extensions in "Tools > Add-ons > Extensions" then click the "Find Updates" button (in Firefox 4: right-click the extension -> "Find Updates") to do a compatibility check.