Extensions that I install appear disabled when I launch the browser.

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It is possible that there is a problem with the files that store the registry extensions.

Delete the files (extensions.json, extensions.sqlite, extensions.ini) extensions.* and compatibility.ini in the profile folder of Firefox to reset the extensions registry.

New files will be created if necessary.

See "extension corrupted files:

If you see disabled extensions or is not compatible in ' Firefox/tools > Modules > Extensions ' and then click the Tools button at the left end of the search bar to check if there is an update available compatibility.

If this did not help, then also delete the files addons.json and addons.sqlite possible.

You can check for problems with preferences.

Delete possible user.js and files numbered prefs-# .js and rename (or delete) the file prefs.js to reset all the prefs by default, including the prefs set via user.js and pref which is no longer supported in the current version of Firefox.

Tags: Firefox

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