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Where are my add-ons in Firefox 42??

  • 3 respostas
  • 6 têm este problema
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  • Última resposta por FrankMichael
  • Resolvido

Since I updated to Firefox 42 in my Mac, I can't find my add-ons, just a bunch of ads for more add-ons.

Since I updated to Firefox 42 in my Mac, I can't find my add-ons, just a bunch of ads for more add-ons.

Solução escolhida

Do you still see any extensions in the extensions folder in the Firefox profile folder?

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


Do you have an "Old Firefox Data" folder on the desktop in case you have refreshed Firefox and created a new profile?

You can recover data from such a saved profile, but be cautious to recover possibly corrupted files.


It is possible that there is a problem with the file(s) that store the extensions registry.

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

New files will be created when required.

See "Corrupt extension files":

If you see disabled or not compatible extensions in "Firefox menu button/Tools > Add-ons > Extensions" then click the Tools button at the left end of the Search bar to check if there is a compatibility update available.

If this hasn't helped then also delete the addons.json file.

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Solução escolhida

Do you still see any extensions in the extensions folder in the Firefox profile folder?

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


Do you have an "Old Firefox Data" folder on the desktop in case you have refreshed Firefox and created a new profile?

You can recover data from such a saved profile, but be cautious to recover possibly corrupted files.


It is possible that there is a problem with the file(s) that store the extensions registry.

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

New files will be created when required.

See "Corrupt extension files":

If you see disabled or not compatible extensions in "Firefox menu button/Tools > Add-ons > Extensions" then click the Tools button at the left end of the Search bar to check if there is a compatibility update available.

If this hasn't helped then also delete the addons.json file.

Thank you all! I found the add ons manager file.

FrankMichael said

Thank you all! I found the add ons manager file.