None of my add ons are showing. Firefox 18.0.2, Ubuntu 12.10. Recent issue.
All sympthoms are similar to question at http://support.mozilla.org/en-US/questions/949490
The version 18.0.1 was fine, no any problems. Problems have started since I updated Firefox to version 18.0.2, before it was no issues with extension compatibility. Everything works except add-ons. I cannot install and/or update add-ons as well. I cannot open the page at https://addons.mozilla.org/ The page gives a message: "The connection has timed out".
Add-ons bar at the bottom of the screen seems to be working, but none of my extensions are showing next to the navigation bar. I run Firefox on the Linux Ubuntu 12.10 (32-bit), as well, and no issues.
Additional System Details
Installed Plug-ins
- Java plug-in for NPAPI-based browsers.
- Shockwave Flash 11.2 r202
- This plug-in detects the presence of iTunes when opening iTunes Store URLs in a web page with Firefox.
- The Totem 3.4.3 plugin handles video and audio streams.
- DivX Web Player version 1.4.0.233
Application
- User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:18.0) Gecko/20100101 Firefox/18.0
More Information
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":
- http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
- https://support.mozilla.org/kb/Unable+to+install+add-ons
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.
Create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
- https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
- http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.