![]() ![]() As you cannot open Firefox normally, you have to start it in Safe Mode first. Solution 2: Start Firefox In Safe Mode and Disable ExtensionsĪs mentioned before, the third-party extensions added to your Firefox could also lead to the problem, so disabling these extensions may help to fix the issue. If the error persists, please move on to the next solution. Now, you can try opening your Firefox again to check if the “couldn’t load XPCOM” error has been removed. Step 3: Click Apply and OK button to save changes. Step 2: Click the Compatibility tab and check the Run this program as an administrator option. Step 1: Right-click the shortcut icon or executable file of Firefox and choose Properties. So, if you encounter the XPCOM error, try launching your Firefox as an administrator at first. ![]() It is acknowledged that a program might run into certain problems if it lacks administrator privileges. Read More Solution 1: Run Your Firefox As Administrator But before you completely give up your Firefox browser, you can try the following solutions to fix the “couldn’t load XPCOM” error. If you cannot open Mozilla Firefox due to the error, you can turn to another installed browser. The XPCOM error in Firefox commonly occurs after a Windows Update and may be caused by various factors like third-party extensions. According to the reports from affected users, they cannot open Firefox and only get a Firefox dialog saying “Couldn’t load XPCOM” on screen. Today, we will discuss the couldn’t load XPCOM Firefox error. Firefox is the third-most popular web browser after Google Chrome and Safari. It is available for multiple operating systems, including Windows 7 or newer, macOS, and Linux. Mozilla Firefox, or simply Firefox, is a free and open-source web browser used by a large number of users. Solution 2: Start Firefox In Safe Mode and Disable Extensions.Solution 1: Run Your Firefox As Administrator.Here, MiniTool Partition Wizard explores some feasible methods to fix “Firefox couldn’t load XPCOM” in Windows 10. If you are experiencing the same problem, you are in the right place. Many users complain that they cannot open Firefox browser due to the “Couldn’t load XPCOM” error. ![]()
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