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How do I get back my installed extensions list (which now shows up empty, in spite of working fine)?

  • 2 replies
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  • Last reply by hugbear

hugbear
hugbear
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Firefox 19.x automatically upgraded to 20.0. Since then, it got stuck on "Checking add-on compatibility". Looking for solutions, I've come across one that indicated deleting Prefs.js, User.js and Sessionstore.js from my C:\Users\******\AppData\Roaming\Mozilla\Firefox\Profiles\********.default\ folder. It worked, but now I've only got a handfull of add-ons and no extensions listing. FileLab, Java, Shockwave and VLC are of those shown. I can't see NoScript, AdBlockPlus, TabMixPlus, Xmarks, X-notifier, LastPass and a couple more. Any help would be appreciated, thank you!

BTW, the newly installed Troubleshooter doesn't show up either!

Firefox 19.x automatically upgraded to 20.0. Since then, it got stuck on "Checking add-on compatibility". Looking for solutions, I've come across one that indicated deleting Prefs.js, User.js and Sessionstore.js from my C:\Users\******\AppData\Roaming\Mozilla\Firefox\Profiles\********.default\ folder. It worked, but now I've only got a handfull of add-ons and no extensions listing. FileLab, Java, Shockwave and VLC are of those shown. I can't see NoScript, AdBlockPlus, TabMixPlus, Xmarks, X-notifier, LastPass and a couple more. Any help would be appreciated, thank you! BTW, the newly installed Troubleshooter doesn't show up either!

Chosen solution

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

Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) 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, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left end side of the Search Bar ("Find Updates" button in older Firefox versions) to check if there is a compatibility update available.

If this hasn't helped then also try to delete the addons.sqlite file.

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cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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Chosen Solution

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

Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) 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, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left end side of the Search Bar ("Find Updates" button in older Firefox versions) to check if there is a compatibility update available.

If this hasn't helped then also try to delete the addons.sqlite file.

hugbear
hugbear Question owner
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Thank you for your swift response, which was also spot-on. Problem solved!