Since installing Firefox 4 Beta 5, the Add-Ons manager is empty. My add-ons still appear to be installed and working, but I can't install more, or uninstall, or configure them.
My add-ons still appear to be installed and working, but I can't install more, or uninstall, or configure them.
Chosen solution
Try forcing Firefox to rebuild the list of installed add-ons.
- Open the profile folder, for details of how to access it see the Profiles - Where Firefox stores your bookmarks, passwords and other user data article.
- Close Firefox, then delete extensions.sqlite (you can also delete extensions.cache, extensions.ini, extensions.rdf if they exist)
When you restart Firefox the list of installed add-ons should be rebuilt.
If that did not work, you may have an add-on that is causing the problem, try the options in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article.
If you type about:addons into the location bar does that bring up the list of add-ons? I have seen a blank add-ons list if Mr Tech Toolkit add-on is installed, accessing the add-ons manager by typing about:addons in the location bar is a workaround with that add-on installed. The author of that add-on is working on an update.
Read this answer in context 5Additional System Details
This happened
Every time Firefox opened
This started when...
I installed Firefox 4 Beta 5
Installed Plug-ins
- Google Update
- Shockwave Flash 10.1 r82
- Adobe Shockwave for Director Netscape plug-in, version 11.5
- iTunes Detector Plug-in
- GEPlugin
- 4.0.50826.0
- NPWLPG
- Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
- 6.0.12.732
- RealPlayer(tm) LiveConnect-Enabled Plug-In
- RealJukebox Netscape Plugin
- RealPlayer(tm) HTML5VideoShim Plug-In
- Unity Player 2.1.0f5
- Java(TM) Platform SE binary
- Next Generation Java Plug-in 1.6.0_20 for Mozilla browsers
- Adobe PDF Plug-In For Firefox and Netscape "9.3.3"
- The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
- Npdsplay dll
- DRM Store Netscape Plugin
- DRM Netscape Network Object
Application
- User Agent: Mozilla/5.0 (Windows NT 5.1; rv:2.0b5) Gecko/20100101 Firefox/4.0b5
More Information
I also received this error after upgrading to Beta 5: "Operation cannot be completed because of an internal failure. A secure network connection has not been cleaned up correctly."
Chosen Solution
Try forcing Firefox to rebuild the list of installed add-ons.
- Open the profile folder, for details of how to access it see the Profiles - Where Firefox stores your bookmarks, passwords and other user data article.
- Close Firefox, then delete extensions.sqlite (you can also delete extensions.cache, extensions.ini, extensions.rdf if they exist)
When you restart Firefox the list of installed add-ons should be rebuilt.
If that did not work, you may have an add-on that is causing the problem, try the options in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article.
If you type about:addons into the location bar does that bring up the list of add-ons? I have seen a blank add-ons list if Mr Tech Toolkit add-on is installed, accessing the add-ons manager by typing about:addons in the location bar is a workaround with that add-on installed. The author of that add-on is working on an update.
Modified by TonyE
Question owner
I could see the addons when I used about:addons.
I removed MR Tech Toolkit and all is well.
THANKS! :D
In my case, disabling Echofon, which was installed when I was using 3.6, fixed it (ran safe mode, disabled all addons, and tried enabling each one). I was using 4.0 beta7.