Firefox browser does not work because of "cannot open XPCOM. Someone help? Must keep ALL my favorites!
I can uninstall and reinstall, etc, but I have to keep all my Firefox bookmarks and all files first. I can't lose hundreds of bookmarks! I have not how or where they are, Firefox won't work.
The error message on XPCOM usually occurs due to a Firefox update failure that left you with a mixture of old and update files in the Firefox program folder. This can occur where a security software held a handful of some files in the program folder prevents Firefox Firefox to replace all files. You can do a clean reinstall to ensure that all files are replaced.
Do a clean reinstall of the current version of Firefox and remove the Firefox program folder before installing a new copy of the current version of Firefox.
- Download the installer of Firefox and save the file to the desktop
https://www.Mozilla.org/en-us/Firefox/all/
If possible to uninstall your current version of Firefox to clean the Windows registry and settings in the security software.
- Do NOT remove the "personal data" when you uninstall your current version of Firefox, because this will remove all profile folders and you lose personal data such as bookmarks and passwords including data profiles created by other versions of Firefox.
Delete the program folder Firefox before installing newly downloaded copy of the Firefox installer.
- (32-bit Windows) "C:\Program Files\Mozilla Firefox\"
- (Windows 64 bit) "C:\Program Files (x 86) \Mozilla.
- It is important to remove the Firefox program folder to remove all the files and make sure that there is no problem with the files that were the remains after uninstallation.
- http://KB.mozillazine.org/Uninstalling_Firefox
Your personal data such as bookmarks are stored in the Firefox profile folder, so you will not lose data when you uninstall and reinstall or update Firefox, but be careful NOT to delete personal data when you uninstall Firefox which removes all Firefox profile folders and you lose your data.
If you keep problems, and then create a new profile to test whether your profile is at the origin of the problem.
(edit: got a confirmation by PM that this answer solved the problem, so I mark it as the solution)
Tags: Firefox
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