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- Outdated Firefox- The outdated version of the Firefox app may cause this error.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.
Txoj Kev 1: Kev daws teeb meem yooj yim
The first approach to solve the Couldn’t load XPCOM error is to try the basic troubleshooting methods listed in this section.
1. Rov pib 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 lub qhov rais key, click on the hwj chim button at the bottom-left corner, and click on the Pib dua option to restart your PC.
2. Tshawb xyuas kev sib txuas hauv Is Taws Nem
An unstable Internet connection may hinder you from using the Firefox browser. You can check the speed of the connection using the Kuaj ceev 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. Tua tawm chaw los ntawm nias Windows + I keys ua ke.
2. Nias rau apps chaw.
3. Nias rau Default apps nyob rau sab lauj sab xis.
4. Scroll down and click on the current Web browser.
5. Choose from the option as per your preference.
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4. Muab Cov Ntawv Sau Tseg Ib Ntus
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. Repair Corrupt Files
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. Hloov kho 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. Khiav qhov rai teeb meem 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. Ua System 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. Nias lub Windows qhov tseem ceeb, hom firefox thiab nyem rau ntawm Khiav raws li cov thawj coj kev xaiv.
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. Ntaus lub Windows qhov tseem ceeb, hom Firefox thiab nias rau Qhib.
2. Nyem ntawm qhov Open Application Menu button (indicated by the three horizontal lines) at the top-right corner of the home page and click on the chaw option on the list displayed.
3. Hauv General tab, nyem rau ntawm Kos rau cov tshiab khawm hauv Firefox Hloov Kho seem.
4. Koj yuav pom cov Firefox is up to date message on the Firefox Updates section.
Nco ntsoov: 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. Tshaj tawm rau Firefox app ntawm lub Qhov Nrhiav Tshawb Nrhiav bar.
2. Tom ntej no, nyem rau ntawm qhov Open Application Menu khawm thiab nyem rau ntawm pab option on the list displayed.
3. Nyem ntawm qhov Troubleshoot Mode… nyob rau hauv lub Firefox help qhov rais.
4. Tam sim no, nyem rau ntawm qhov Pib dua khawm ntawm tus Pib dua Firefox hauv Troubleshoot Mode pop-up qhov rais.
5. Nyem ntawm qhov Hloov tshiab Firefox khawm ntawm tus Open Firefox in Troubleshoot Mode confirmation window.
6. Ces, nyem rau ntawm qhov Hloov tshiab Firefox khawm ntawm tus Refresh Firefox to its default settings qhov rais.
7. Thaum kawg, nyem rau ntawm qhov Tag khawm ntawm tus 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. qhib lub Mozilla Firefox app ntawm lub Qhov Nrhiav Tshawb Nrhiav bar.
2. Nyem ntawm qhov Open Application Menu khawm thiab nyem rau ntawm pab option on the list displayed.
3. Tam sim no, nyem rau ntawm qhov Troubleshoot Mode… nyob rau hauv lub Firefox help qhov rais.
4. Nyem ntawm qhov Qhib khawm ntawm tus Pib dua Firefox hauv Troubleshoot Mode pop-up qhov rais.
5. Tom ntej no, nyem rau ntawm qhov Open Application Menu khawm thiab nyem rau ntawm Ntxiv-ons thiab cov ntsiab lus option on the list.
6. Nyem ntawm qhov extensions tab on the left pane of the next window and toggle tawm the add-ons on the window.
7. Ces, nyem rau ntawm qhov peb kab rov tav dots button on the add-on and click on the tshem tawm button on the list.
8. Nyem ntawm qhov tshem tawm 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. qhib lub Mozilla Firefox app.
2. Nyem ntawm qhov Open Application Menu khawm thiab nyem rau ntawm bookmarks option in the list displayed.
3. Hauv bookmarks menu, nyem rau ntawm qhov Tswj bookmarks option at the bottom of the list.
4. Hauv Library screen, nyem rau ntawm Import and Backup button at the menu bar and click on the Export Bookmarks to HTML… option in the drop-down menu displayed.
5. Hauv Export Bookmarks File window, browse and select a location, and click on the Txuag 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. Tshaj tawm rau Firefox browser app.
2. Hom txog: profiles in the URL address bar at the top and press the Sau qhov tseem ceeb qhib lub About Profiles qhov rais.
3. Nyem ntawm qhov Tsim ib qhov profile tshiab khawm ntawm qhov rais.
4. Tom ntej no, nyem rau ntawm qhov Tom ntej no khawm ntawm tus Welcome to the Create Profile Wizard.
5. Type a name for the Profile in the Sau lub npe tshiab profile teb thiab nias rau ntawm Tag button in the window to create the Profile.
Nco ntsoov: Nyem rau ntawm qhov 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. Nias lub Windows qhov tseem ceeb, hom tswj vaj huam sib luag thiab nias rau Qhib.
2. Click on the option Qeb nyob rau hauv lub Saib los ntawm drop-down menu and click on the Uninstall ib qho program kev xaiv nyob hauv Programs lub taub hau.
3. Xaiv qhov Mozilla Firefox (x64 en-US) in the list, click on the uninstall button at the top of the bar and click on the Yog khawm ntawm lub qhov rais UAC.
4. Ces, nyem rau ntawm qhov Tom ntej no khawm hauv Mozilla Firefox Uninstall wizard.
5. Tom ntej no, nyem rau ntawm qhov uninstall button in the next window.
6. Nyem ntawm qhov Tag button on the last window to completely uninstall the Firefox app.
7. Nias lub Windows + E lag luam together to open the File Explorer and navigate to the This PC > Local Disk (C:) > Program Files > Mozilla Firefox nplaub tshev.
8. Txoj cai-nias rau ntawm Mozilla Firefox folder thiab nyem rau ntawm qhov Rho tawm 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. Ntaus lub Windows qhov tseem ceeb, hom google chrome thiab nias rau Qhib.
Nco ntsoov: You can use any web browser to download the Firefox browser on your PC.
2. Qhib official lub website ntawm lub Mozilla Firefox browser on Google Chrome and click on the Download Firefox khawm ntawm qhov rais.
3. Double-click on the downloaded executable file Firefox Installer.exe to run the installation file.
4. Tos rau cov txheej txheem installation kom tiav.
5. Tshaj tawm rau 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. qhib lub Firefox app.
2. Nyem ntawm qhov Open Application Menu khawm thiab nyem rau ntawm chaw option on the list displayed.
3. Hauv General tab, nyem rau ntawm Chaw ... khawm hauv network chaw seem.
4. Xaiv qhov Manual proxy configuration kev xaiv ntawm tus Txuas Cov Chaw qhov rais.
5. Hom SOCKS Host: 127.0.0.1 Port: 9050 nyob rau hauv lub HTTP Pov Thawj teb, hom 8080 nyob rau hauv lub Chaw nres nkoj field, and click on the OK khawm.
6. Ces, ntaus Hais txog: config on the search bar of the Firefox browser and click on the Txais Txoj Kev Pheej Hmoo thiab Txuas Mus Ntxiv khawm.
7. Finally, type network.proxy.socks_remote_dns nyob rau hauv lub search bar thiab nyem rau ntawm qhov toggle button to set the type of the entry to be muaj tseeb.
8. Tam sim no, ntaus https://check.torptoject.org/ in the search bar on the Firefox browser and press the Sau key to check the issues with the Tor Browser.
pom zoo:
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.