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Couldn’t load XPCOM on Firefox in Windows 10


The solutions listed below will also prove useful if you are encountering the following issues:

  • Couldn’t load XPCOM
  • Firefox couldn’t load XPCOM
  • Couldn’t load XPCOM Windows 10
  • Firefox couldn’t load XPCOM Windows 10

How do I fix XPCOM loading errors?

1. Consider using another browser

If Firefox is giving you a hard time in general, and not just because of the XPCOM issues, then maybe you should consider using a different browser entirely.

On that note, we recommend you give Opera a shot. This web browser is built using the Chromium engine, just like Edge and Chrome, and it is extremely stable and reliable, allowing for near-zero errors to occur.

It also has some extra tools that most other browsers don’t except through the use of extensions, such as a built-in VPN, and a very efficient ad-blocker.

Opera

Opera

Enjoy an error-free browser that is incredibly fast and also has a high level of customization at no cost at all.

2. Completely remove Firefox and reinstall it

Users reported that this error occurs when they try to open Firefox and that they are unable to use Firefox at all.

This can be a major problem if you use Firefox as your default web browser, but you should be able to fix this problem simply by reinstalling Firefox.

To do that, first you need to uninstall Firefox application from your PC. Uninstalling Firefox isn’t usually enough, and to fix this problem you’ll have to completely remove all files associated with Firefox.

To do that, remove these folders:

  • C:Program FilesMozilla Firefox
    • If you’re using a 32-bit version of Windows 10
  • C:Program Files(x86)Mozilla Firefox
    • If you’re using 64-bit version of Windows.

Run a System Scan to discover potential errors

Restoro Scan

Click Start Scan to find Windows issues.

Restoro Fix

Click Repair All to fix issues with Patented Technologies.

Run a PC Scan with Restoro Repair Tool to find errors causing security problems and slowdowns. After the scan is complete, the repair process will replace damaged files with fresh Windows files and components.

Users are also suggesting to remove the following folders from your PC:

  • C:Usersyour_user_nameAppDataLocalMozillaFirefox
  • C:Usersyour_user_nameAppDataLocalMozillaupdates
  • C:Usersyour_user_nameAppDataLocalVirtualStoreProgram FilesMozilla Firefox

After uninstalling Firefox and removing its installation directory, download the latest version of Firefox and install it. When the installation process is finished, start Firefox and check if the problem is resolved.



This post was written by Milan Stanojevic and was first posted to WindowsReport



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