Mozilla Firefox is a trusted Web Browser and is compatible with most devices. However, the Couldn’t load XPCOM error message pops up now and then. The XPCOM is a cross-platform component model from the Mozilla Firefox, so the Cannot load XPCOM error disrupts the browsing. You may click on the OK button to close the error message, but you may not be able to use the Firefox app. The article addresses the error and the methods to resolve the XPCOM Firefox error are explained here.
How to Fix Mozilla Firefox Couldn’t Load XPCOM Error on Windows 10
The list of causes for which the XPCOM error occurs on Firefox is given in this section.
- Outdated Firefox- The outdated version of the Firefox app may cause this error.
- Corrupt Firefox User Profile- The User Profile on the Firefox Web Browser may be corrupt or may have malware sources.
- Third-party Extensions on Firefox- The issue with the XPCOM may arise if there are third-party extensions installed on the Firefox app.
- Corrupt System Files- The System files installed locally on your PC may have been corrupt or the PC may be infected with a virus.
Metòd 1: Metòd debaz depanaj
The first approach to solve the Couldn’t load XPCOM error is to try the basic troubleshooting methods listed in this section.
1. Rekòmanse PC
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. Press the Windows key, click on the Pouvwa button at the bottom-left corner, and click on the Rekòmanse opsyon pou rekòmanse PC ou.
2. Tcheke Koneksyon Entènèt
An unstable Internet connection may hinder you from using the Firefox browser. You can check the speed of the connection using the Tès vitès and assess its quality.
- If the speed is low, try using any other Wi-Fi network for browsing on Firefox.
- Consider changing the data plan of the Internet Connection to a better plan.
3. Switch to Another Web Browser
If the XPCOM error with the Firefox Web Browser is still not resolved, you can try switching to another Web Browser like Google Chrome. Follow the steps below to switch to a different browser:
1. Lanse Anviwònman pa peze Windows + I kle ansanm.
2. Klike sou apps anviwònman.
3. Klike sou Default apps sou fenèt gòch la.
4. Scroll down and click on the current Navigatè entènèt.
5. Choose from the option as per your preference.
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4. Efase dosye tanporè yo
The numerous temporary files saved locally on your PC may have disrupted the browsing activity on Firefox. You can read the method to delete the temp files on your PC using the link given here.
5. Reparasyon dosye koripsyon
The files on your PC may be corrupt and have some issues which may cause the Couldn’t load XPCOM error. Read the article to repair system files on Windows 10 for corrupt files using the link provided here.
6. Mete ajou Windows
In most instances, using an outdated OS may cause issues on the PC; you need to update the Windows on your PC to the latest version to fix this error. Read the article on how to update Windows on your PC using the link given here.
7. Kouri Windows Update Troubleshooter
The issues with the Firefox browser can be cleared by using the Windows Troubleshooter on your PC. Read the method to run the Windows Troubleshooter using the link here and fix the error.
8. Disable Antivirus Temporarily (If Applicable)
The third-party security services on your PC may disrupt you from using the Firefox app; you can disable the anti-virus program to fix this error. Implement the steps given in the link here to disable the Anti-virus software on your PC.
9. Fè Sistèm Restore
If the Firefox app performed better on the previous version of the Windows PC, you can try performing a System Restore on your PC to fix the error. The link which is given here will provide you with the method to perform a System Restore on your PC.
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Method 2: Run Firefox as Administrator
The Couldn’t load XPCOM error might appear if the Firefox is not granted the administrative permissions on your PC. You have to run the Firefox app as an Administrator on your Pc to fix the error.
1. Peze la Windows klekalite Firefox epi klike sou la Kouri kòm administratè opsyon.
Method 3: Update Firefox Browser
Using an outdated version of the Firefox Web Browser can be a reason for this error. Follow the steps below to update the Firefox app on your PC.
1. Frape a Windows klekalite Firefox , epi klike sou louvri.
2. Klike sou la Open Application Menu button (indicated by the three horizontal lines) at the top-right corner of the home page and click on the Anviwònman option on the list displayed.
3. Nan jeneral tab, klike sou la Tcheke pou mizajou bouton nan la Firefox Mizajou seksyon.
4. Ou pral wè a Firefox is up to date message on the Firefox Updates section.
Remak: If there is an update for the Firefox browser, you will be prompted accordingly.
Method 4: Refresh Firefox Browser
To fix the Couldn’t load XPCOM error on the Firefox app, you can refresh Firefox entirely.
1. Lanse a Firefox app soti nan la Windows Search ba.
2. Apre sa, klike sou la Open Application Menu bouton epi klike sou la Ede option on the list displayed.
3. Klike sou la Troubleshoot Mode… nan Firefox help fenèt.
4. Koulye a, klike sou la Rekòmanse bouton sou la Rekòmanse Firefox nan mòd depanaj fenèt pop-up.
5. Klike sou la Rafrechi Firefox bouton sou la Open Firefox in Troubleshoot Mode confirmation window.
6. Lè sa a, klike sou la Rafrechi Firefox bouton sou la Refresh Firefox to its default settings fenèt.
7. Finalman, klike sou la Fini bouton sou la Import Complete window to Refresh Firefox completely.
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Method 5: Disable Firefox Extensions
The extensions on the Firefox Web Browser can be a reason for the Couldn’t load XPCOM error. You can disable the extensions on the browser to fix the error.
1. louvri nan Mozilla Firefox app soti nan la Windows Search ba.
2. Klike sou la Open Application Menu bouton epi klike sou la Ede option on the list displayed.
3. Koulye a, klike sou la Troubleshoot Mode… nan Firefox help fenèt.
4. Klike sou la louvri bouton sou la Rekòmanse Firefox nan mòd depanaj fenèt pop-up.
5. Apre sa, klike sou la Open Application Menu bouton epi klike sou la Add-ons ak tèm option on the list.
6. Klike sou la Ekstansyon tab on the left pane of the next window and toggle Off the add-ons on the window.
7. Lè sa a, klike sou la twa pwen orizontal button on the add-on and click on the Retire button on the list.
8. Klike sou la Retire button on the confirmation pop-up message window.
Method 6: Create New Firefox Profile
The current User Profile on the Firefox web browser may be corrupt; you can create a new User Profile to fix the Couldn’t load XPCOM error.
Step I: Import Saved Bookmarks
As a first step, you need to import the Bookmarks you have saved on the current User Profile to avoid any loss of data.
1. louvri nan Mozilla Firefox app.
2. Klike sou la Open Application Menu bouton epi klike sou la Bookmarks opsyon nan lis ki parèt la.
3. Nan Bookmarks meni, klike sou la Jere Bookmarks option at the bottom of the list.
4. Nan Bibliyotèk ekran, klike sou la Import and Backup button at the menu bar and click on the Export Bookmarks to HTML… option in the drop-down menu displayed.
5. Nan Export Bookmarks File window, browse and select a location, and click on the Save button to save the bookmarks file.
Step II: Create New User Profile
This section will introduce the method to create a new User Profile on the Firefox app to fix the Couldn’t load XPCOM error.
1. Lanse a Firefox aplikasyon navigatè.
2. Kalite sou: Des in the URL address bar at the top and press the Antre nan kle yo louvri a About Profiles fenèt.
3. Klike sou la Kreye yon nouvo pwofil bouton sou fenèt la.
4. Apre sa, klike sou la Next bouton sou la Welcome to the Create Profile Wizard.
5. Type a name for the Profile in the Mete nouvo pwofil non jaden epi klike sou la Fini button in the window to create the Profile.
Remak: Klike sou la Choose Folder… button to change the location for storing the User Profile name instead of the default location.
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Method 7: Reinstall Firefox
The Firefox app installed on your PC might be corrupt or not properly installed. You can reinstall Firefox on your PC to fix the Couldn’t load XPCOM error.
Step I: Uninstall Firefox
The first step is to uninstall the existing version of the Firefox web browser on your PC using the Control Panel.
1. Peze la Windows klekalite panno kontwòl , epi klike sou louvri.
2. Klike sou opsyon a kategori nan Gade pa drop-down menu and click on the Désinstaller yon pwogram opsyon nan la Pwogram tit.
3. Chwazi nan Mozilla Firefox (x64 en-US) in the list, click on the Enstriksyon button at the top of the bar and click on the Wi bouton sou fenèt la UAC.
4. Lè sa a, klike sou la Next bouton nan la Mozilla Firefox Uninstall sòsye.
5. Apre sa, klike sou la Enstriksyon button in the next window.
6. Klike sou la Fini button on the last window to completely uninstall the Firefox app.
7. Peze la Windows+ E kle together to open the File Explorer and navigate to the This PC > Local Disk (C:) > Program Files > Mozilla Firefox folder.
8. Dwa-klike sou la Mozilla Firefox katab epi klike sou la Efase option on the list to delete the files.
Step II: Reinstall Firefox
The next step to fix the Couldn’t load XPCOM error is to reinstall the Firefox Web Browser on your PC.
1. Frape a Windows klekalite google chrome , epi klike sou louvri.
Remak: You can use any web browser to download the Firefox browser on your PC.
2. Louvri sit entènèt ofisyèl la nan Mozilla Firefox navigatè on Google Chrome and click on the Download Firefox bouton sou fenèt la.
3. Double-click on the downloaded executable file Firefox Installer.exe to run the installation file.
4. Tann pou pwosesis enstalasyon an fini.
5. Lanse a Firefox Web Browser app on your PC.
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Method 8: Modify Tor Web Browser Settings
If you are using the Tor Web browser, in addition to Firefox, the issues on the Tor browser may cause the Couldn’t load XPCOM error. To fix this error, you can try checking for the issues on the Tor browser using Firefox to fix the error.
1. louvri nan Firefox app.
2. Klike sou la Open Application Menu bouton epi klike sou la Anviwònman option on the list displayed.
3. Nan jeneral tab, klike sou la Anviwònman... bouton nan la Rezo anviwònman seksyon.
4. Chwazi nan Manual proxy configuration opsyon sou la Anviwònman Koneksyon fenèt.
5. Kalite SOCKS Host: 127.0.0.1 Port: 9050 nan Http proxy jaden, kalite 8080 nan Port field, and click on the OK bouton.
6. Lè sa a, tape About: config on the search bar of the Firefox browser and click on the Aksepte risk la epi kontinye bouton.
7. Finally, type network.proxy.socks_remote_dns nan ba rechèch la epi klike sou la aktive button to set the type of the entry to be vrè.
8. Koulye a, tape https://check.torptoject.org/ in the search bar on the Firefox browser and press the Antre nan key to check the issues with the Tor Browser.
Rekòmande:
The article discusses the methods to fix couldn’t load XPCOM Firefox error on Windows 10 PC. Try implementing the methods discussed in the article to fix the error and please leave your suggestions on the same in the comments section. If you have any queries on the Cannot load XPCOM error, post them in the comments.