Error "TypeError: components.classes['@ [cid] is undefined" when opening of Firefox - every time that it is open!

Since the installation of Firefox 4, I get this error message "type: components.classes['@ [cid] is undefined" whenever Firefox is open and trying to access some Web sites. Very aggravating!

This indicates that you are using an add-on that is not compatible with Firefox 4. To find out how to solve this to find out what is causing the problem, see https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Tags: Firefox

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