Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

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

  • 2 replies
  • 2 have this problem
  • 6 views
  • Last reply by hugbear

hugbear
hugbear
more options

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.

Read this answer in context 👍 2

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

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
more options

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