Quick And Effective Hacks to Fix the Firefox Couldn’t Load XPCOM Error

The Mozilla Firefox couldn’t load XPCOM is one of the most general and frequent issues that a lot of Windows OS users experience. Whenever this error occurs, then the Mozilla Firefox couldn’t open and the following failure appears on your screen. This Mozilla Firefox couldn’t load XPCOM issue might be caused on the Windows-based system whenever the users attempt to access the Mozilla Firefox web browser after a Windows OS update. Additionally, you might encounter this annoying error due to the corrupted Mozilla Firefox profile folder.

In case, if you tried to resolve this frequent error by performing several malware and virus scans, eliminating the junk files by removing the cache of the system and found that none of these fixes the Mozilla Firefox couldn’t load error. Then, don’t get frustrated because every issue has a particular solution to fix it. Hence, in this informative post, you will get the apparent causes of the issue and some of the effective ways to eradicate this error notification.       

Take a Look at Some Apparent Reasons for the Couldn’t Load XPCOM Mozilla Firefox Error:

Before proceeding with the solution part, you need to understand some of the common causes behind the Mozilla Firefox couldn’t load XPCOM issue. In addition, this persistent and bothersome technical issue of the Mozilla Firefox might encounter due to diverse reasons.  

Here we are about to describe some of the common causes due to which this glitch can occur:

1. It might occur on the Windows Operating System because of the corrupted or damaged registry files of the system.
2. Also, this annoying issue if the Mozilla Firefox profile folder is corrupted and damaged.  Moreover, the Mozilla Firefox profile folder corruption usually occurs because of a malware or virus attack or after installing a third-party application or extension on the Mozilla Firefox web browser.   
3. This issue also may arise because of the internal minor technical issues of the system.

Mozilla Firefox Couldn’t Load XPCOM: Smart Ways to Fix

Now, that you are aware of the multiple generic reasons that can drive to the couldn’t load XPCOM Firefox issue, let’s dig into the troubleshooting hacks to eradicate this general error on your own. Here, we have listed some of the easiest methods to fix Firefox could not load  XPCOM error in the Windows OS.

Way 1: Simply Reinstall your Firefox Web Browser

Reinstalling your Firefox browser can be a very effective way sometimes. Thus, before trying some technical methods, this is the most fundamental way you should try to resolve your Firefox issue. To reinstall the Mozilla Firefox, follow the below steps:

1. At first, go to the Start menu and tap on it to open.
2. After that, go to the Search Box of the system and write Control Panel. Tap on the Ok button. Alternatively, you can press the Enter key on the keyboard.
3. This process will open the Control Panel.
4. Now, find the Programs and Features option in the Control Panel. Tap on the option to proceed further.
5. With the help of this process, you will be able to see a long list of applications.
6. Form the list of available applications, locate Mozilla Firefox. Next, you need to right-click on Mozilla Firefox.
7. Now, the Uninstall option will open. Tap on the Uninstall option and select the Ok button to proceed further.

Now, the Mozilla Firefox will be uninstalled. Once all the above-described steps are complete, you need to reinstall the Mozilla Firefox web browser by downloading it from the manufacturer’s website. After this installation process, this glitch will be fixed.  

Way 2: Repair the Corrupt or Damaged Files

By repairing the corrupt and damaged files of the system, you can easily fix this issue. Thus, to do so, follow the below stated steps:

1. At first, go to the Start menu.
2. Now, write Command in the search box. (don’t press the enter key)
3. You need to press the Enter key while holding down the Shift key and Ctrl key on your keyboard.
4. You will get a prompt dialog box and then tap on Yes option.
5. Now, you will get a black box with the cursor which is blinking.
6. Write “regedit” on the box and press the Enter key.
7. Choose the Error related key (eg. Mozilla Firefox) under the registry editor, if you want to back up.
8. Select the Export option under the File menu.
9. Choose the exact folder where you want to save the Mozilla Firefox backup key, under the ‘Save In’ list.
10. Write a name for your backup file in the box which is titled as the File name.
11. You need to make sure that the Selected Branch option is selected under the Export range.
12. Tap on Save option. The file will be saved with the .reg file extension.
13. You now have a backup of your Mozilla Firefox-related registry entry.

Now, check the Windows system to verify that the issue is fixed or not. In case, if the issue still persists, then you need to move out to the next troubleshooting method.

Way 3: Update the Mozilla Firefox Web Browser

This issue might also occur because of the backdated version of your Mozilla Firefox web browser. Therefore, you need to upgrade your Mozilla Firefox to resolve the browser issues. Moreover, the new updated latest Mozilla Firefox version can solve various types of minor issues of your Mozilla Firefox.

To perform this action, you need to go to the manufacturing’s website and download a fresh version of it. Once the entire updating procedure will be done, this error will be surely resolved. In case, if this annoying error still pops up, then you should move out to the next troubleshooting method given below.  

Way 4: Start the Mozilla Firefox Browser in Safe Mode and Disable Mozilla Firefox’s Extensions (Add-ons)

You need to start the Mozilla Firefox browser in safe mode to resolve this XPCOM issue.

Go through the below-mentioned steps to start your Firefox browser in safe mode. The steps are very easy-to-apply and effective too. The steps are mentioned in the following section-

1. You need to hold down the Shift key on your keyboard. After that, double-click on the Firefox application to open it.
2. Select Start in Safe Mode.
3. If you find that your Firefox starts without the XPCOM error message, then the extension of the Firefox is the main victim of this issue. In this case, you need to disable installed add-ons. After that, close and start the Mozilla firefox normally, until you find the right plugin which is the main cause of this problem.
4. You need to select the Add-ons to disable the Mozilla Firefox plugin from the main menu.
5. Disable the installed Add-ons in the extension panel. After that, restart Firefox normally until you find the right extension.
6. Whenever you find the right extension which is the main culprit behind this issue, remove it completely by starting the Mozilla Firefox in Safe mode.

Lastly, you need to check the system to verify whether the error is resolved or not. In case, if the issue still persists, then move out to the next troubleshooting method.

Way 5: Reset Mozilla Firefox Settings To Default (Refresh Firefox)

You can try this easy method to resolve your Firefox browser issues. To perform this action, you need to follow some easy steps. The steps are described hereunder.

1. At first, you need to choose the Safe Mode to start Mozilla Firefox.
2. Next, select the Refresh Firefox option.
3. After that, you need to choose to Refresh Firefox again.
4. The refresh Firefox feature restores all browser settings to default, by creating a new user profile and by removing all Firefox’s Add-ons (extensions) and customization (preferences, plugins, added search engines). The Firefox Refresh doesn’t remove the below-mentioned items.

• Webform auto-fill information
• Personal dictionary
• Cookies
• Passwords
• Open windows and tabs
• Bookmarks
• Browsing history

Way 6: Run the Troubleshooter

If the above-mentioned methods are failed to resolve your Firefox browser issue, then don’t be tense. You can easily run the troubleshooter to get rid of this browser issue. Moreover, the troubleshooter can fix your problem instantly. To run the troubleshooter, you need to follow the steps below. These are as follows:

1. At first, go to the Start Menu and tap on it to open.
2. Next, write ‘Troubleshooting’ in the Search box.
3. After that, you need to select the Troubleshooting option.
4. Tap on the Advanced option in the Troubleshooting option.
5. Select Run as Administrator under the Advanced option.
6. Ensure the checkbox next to Apply repairs automatically is selected.
7. Next, select the Next button. After that, Windows will automatically detect the browser problem and fix the issue.

This troubleshooting process will take a few minutes to complete. Thus, be patient and wait until the entire troubleshooting process completes. After completing the troubleshooting process, restart the system. Lastly, check your Mozilla Firefox browser to see if the issue is fixed or not.

In case, if the Mozilla Firefox couldn’t load XPCOM error still persists, then you should move out to the next method listed below.

Way 7: Run the Windows System File Checker (“sfc /scannow”)

In case, if the above-mentioned troubleshooting way did not work for you, then try to run the Windows system file checker on the system to get rid of this annoying error. To perform this method, follow the below-mentioned steps:

1. At first, go to the Start Menu and tap on it to open.
2. You will get the search box.
3. Write ‘Command’ in that search box  ( don’t press the enter key).
4. You need to press the Enter key while holding down the Shift key and Ctrl key on your keyboard. You will get a prompt dialog box. Tap on the Yes option.
5. Now, you will get a black box with the cursor which is blinking.
6. Write “sfc/scannow” on the box and tap on the Ok button. Alternatively, you can press the Enter key on the keyboard.
7. Now, the system file checker will start the scanning process.
8. This scanning process may take some time. Thus, you need to wait until the entire scanning process completes.  
9. Now, you need to follow the on-screen commands.
10. After completing the whole process, restart your system for good measure.

Way 8: Restore your Computer to an Earlier Working State by using System Restore

Try to restore the system to a previously working state in order to resolve the XPCOM couldn’t open error in the Mozilla Firefox web browser. To do so, go through the following steps:

1. On your keyboard, press down the Windows logo key and the R key together. This key combination will open the Run Dialog Box.
2. Go to the Run dialog Box and write ‘rstrui’ and tap on the Ok button. Alternatively, press the Enter key on the keyboard.
3. Tap on the Next option on the first screen.
4. Now, select an earlier working state (Date/Time).
5. Lastly, tap on the Next button to begin the restore process.

Final Words

Hopefully, the above-described troubleshooting hacks will help you a lot to diagnose this Mozilla Firefox error within a flicker of time. In this article, you will get a complete solution regarding your Mozilla Firefox XPCOM issue. Moreover, the methods to fix it are easy-to-apply and effective at the same time. This article assists the non-tech-savvy person and helps in resolving Mozilla Firefox couldn’t load XPCOM issue.