Consider changing the data plan of the Internet Connection to a better plan.If the speed is low, try using any other Wi-Fi network for browsing on Firefox.You can check the speed of the connection using the Speed test and assess its quality. Press the Windows key, click on the Power button at the bottom-left corner, and click on the Restart option to restart your PC.Īn unstable Internet connection may hinder you from using the Firefox browser. There might be some glitches on your PC that prevent you from using the Firefox browser you can restart your PC to fix the error.

The first approach to solve the Couldn’t load XPCOM error is to try the basic troubleshooting methods listed in this section.

Corrupt System Files- The System files installed locally on your PC may have been corrupt or the PC may be infected with a virus.

Third-party Extensions on Firefox- The issue with the XPCOM may arise if there are third-party extensions installed on the Firefox app.

Corrupt Firefox User Profile- The User Profile on the Firefox Web Browser may be corrupt or may have malware sources.

Outdated Firefox- The outdated version of the Firefox app may cause this error.

The list of causes for which the XPCOM error occurs on Firefox is given in this section. How to Fix Mozilla Firefox Couldn’t Load XPCOM Error on Windows 10

Method 8: Modify Tor Web Browser Settings.

Method 1: Basic Troubleshooting Methods.

How to Fix Mozilla Firefox Couldn’t Load XPCOM Error on Windows 10.

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