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Firefox won't install any addons/themes, existing ones don't show up on addon list.

  • 1 reply
  • 28 have this problem
  • Last reply by cor-el

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Okay so when I go to tools>add-ons the list is empty, it shows no extensions, themes, languages, plugins even though there are ones installed and in use. Also when I try to download add-ons they don't install and don't show up on the list either.

This happened

Every time Firefox opened

All Replies (1)

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Delete the files extensions.* (extensions.rdf, extensions.cache, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry. See "Corrupt extension files":

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.