Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

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.

When I open my Firefox browser, some of my add-ons do not appear (LastPass and Feedly, specifically). How do I fix this?

  • 3 replies
  • 1 has this problem
  • 4 views
  • Last reply by cor-el

fortunecookie
fortunecookie
more options

Ever since I updated to Firefox 19, I noticed that not all of my add-ons activate whenever I launch the browser, usually it's my Feedly, SuperStart, and LastPass extensions. Sometimes they do appear but most of the time they don't. I am not really sure what do I have to do to fix this.

Ever since I updated to Firefox 19, I noticed that not all of my add-ons activate whenever I launch the browser, usually it's my Feedly, SuperStart, and LastPass extensions. Sometimes they do appear but most of the time they don't. I am not really sure what do I have to do to fix this.

All Replies (3)

Andrew
Andrew
  • Moderator
more options

Please contact the support department for those add-ons as we do not regulate add-ons. Add-ons need to be regularly updated to meet with the latest version of Firefox.

fortunecookie
fortunecookie Question owner
more options

I would have definitely done that if they don't work at all. But sometimes when I launch the browser, it's there. That is why I have deduced that it's not the add-ons' fault anymore but there's something about the browser that is not working properly.

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

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 side of the Search Bar (or click the "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.