type error components.classes@mozilla.org/extensions/manager,/is undefined(This message comes up when I click on mozilla to search internet
When I click on mozilla to search internet the error comes on. I have installed mozilla 3.6, 4.0 3.4 on my desktop
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I have this problem too on Firefox 4.0 Beta 3
ask toolbar add-in disable it problem goes away
It is not an extension that causes the problem, it is the extension maganer that crashes. Cannot open The add-ons window at all: Firefox crashes completely.
stammeshaus, try running Firefox in safe mode, and use it to disable all extensions. The error message is caused by an incompatible add-on. I have seen reports of it with a few add-ons, this is due to changes in Firefox which made the add-ons no longer work.
The extension manager can crash with a possible cause of corrupted files extensions.* in the Firefox Profile Folder
You can delete the files extensions.* (extensions.rdf, extensions.cache, extensions.ini, extensions.sqlite) 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
If you see disabled extensions that are not compatible on the next start in "Tools > Add-ons > Extensions" then click the "Find Updates" button to do a compatibility check.
After reading a few posts, I looked thru my extensions. I disabled Ask.com tool bar and the problem went away.
Just go to tools then add-ons you will find extensions , open and there you will find Ask.com , just delete it , but this is only if you already deleted the ask tool bar from control panel and you didn't delete it from the extension add-ons , that;s why it makes this error if you delete the ask.com tool bar and you left this without deleting it. Cheers guys
I have this problem too on Firefox 4.0
Uninstall the mozilla including personal info and re-install. problem is solved.
I disabled the Avery toolbar extension and no longer have this problem. :)
Modified
Removing the ask toolbar worked for me as well.. I don't get why big companies like ask release things that make browsers bug out?!?!