Firefox couldn't load XPCOM in Windows 11/10

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If when running your Mozilla Firefox web browser on Windows 10/eight.1, you receive a Couldn't load XPCOM fault message, every time you lot run information technology, here are a few things you may want to try to troubleshoot and set up the consequence.

Firefox couldn't load XPCOM

XPCOM is a cantankerous-platform component object model, which is like to Microsoft COM, and is required for file and retentiveness management, bones data structures and so on.

This Firefox start-upwardly error can typically occur after performing a Windows System Restore or if you run it in a Sandbox. In fact I likewise received this bulletin a few days back after I had the organisation restore my calculator a couple of times to set some other issues.

one] Commencement in Prophylactic Fashion and run across

Open Firefox Menu, click the "?" Help push and select Restart with addons disabled. If this solves your issue, you may need to disable some problem-causing addon.

2] Create a new Firefox profile

Create a new Firefox profile and see if that makes the problem become away.

3] Reset Firefox

Reset Firefox and see if that helps you.

four] Uninstall and reinstall Firefox

If nothing helps, you may have to fresh-install Firefox.

Back upwards your bookmarks and saved passwords to a safe location. Uninstall Firefox. Select the Remove my Firefox personal information and customizations pick. Remember that when you exercise this, all profile folders will be removed and you lot will lose personal data like bookmarks and passwords. Hence I said – back them upward outset.

Check the Program Files folder. Delete C:\Program files\Mozilla Firefox or C:\Program Files (x86)\Mozilla Firefox, as your case may be.

Too delete the following folders if you run into them on your computer. The may exist subconscious folders and yous may have to unhide them via Folder Option:

C:\Users\username\AppData\Local\Mozilla\Firefox
C:\Users\username\AppData\Local\Mozilla\updates
C:\Users\username\AppData\Local\VirtualStore\Program Files\Mozilla Firefox

Apply a safety registry cleaner similar freeware CCleaner to articulate PC junk and to clean the Windows Registry of residual Firefox entries.

Restart your Windows estimator and fresh-install Firefox, after downloading it from its official website.

Then once more – only installing the latest Firefox version over your existing installation can also aid. Information technology worked for me at least.

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Anand Khanse is the Admin of TheWindowsClub.com, a 10-year Microsoft MVP (2006-sixteen) & a Windows Insider MVP. Please read the entire postal service & the comments first, create a Organization Restore Point before making any changes to your system & be conscientious nearly whatsoever third-party offers while installing freeware.