How to prevent the add-on compatibility checking whenever he opens Firefox?

How to prevent the add-on compatibility checking whenever he opens Firefox?

Which can be a problem with the compatibility.ini file in the Firefox profile folder.
Try to rename (or delete) the file compatibility.ini in the profile folder of Firefox to see if that helps.

You can use this button to go to the Firefox profile folder currently in use:

Alternatively, 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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