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 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 troubleshooting extensions and themes 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.
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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 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 troubleshooting extensions and themes 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
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.