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- Outdated Firefox- The outdated version of the Firefox app may cause this error.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.
Dòigh 1: Modhan bunaiteach airson fuasgladh cheistean
The first approach to solve the Couldn’t load XPCOM error is to try the basic troubleshooting methods listed in this section.
1. Ath-thòisich 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 iuchair, cliog air an cumhachd button at the bottom-left corner, and click on the Ath-thòisich roghainn airson do PC ath-thòiseachadh.
2. Thoir sùil air ceangal eadar-lìn
An unstable Internet connection may hinder you from using the Firefox browser. You can check the speed of the connection using the Deuchainn astar 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. Launch roghainnean le bhith a ’bruthadh Iuchraichean Windows + I. còmhla.
2. Cliog air Apps suidheachadh.
3. Cliog air Aplacaidean bunaiteach air a ’phana chlì.
4. Scroll down and click on the current Brabhsair lìn.
5. Choose from the option as per your preference.
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4. Cuir às do fhaidhlichean sealach
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. Càradh faidhlichean coirbte
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. Ùraich 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. Run 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. Dèan ath-nuadhachadh siostam
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. Brùth air an Iuchair Windows, seòrsa firefox agus cliog air Rach mar rianaire roghainn.
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. Buail an Iuchair Windows, seòrsa Firefox agus briog air a ' Open.
2. Cliog air a 'phutan Fosgail Clàr-taice Iarrtais button (indicated by the three horizontal lines) at the top-right corner of the home page and click on the roghainnean roghainn air an liosta a tha air a thaisbeanadh.
3. Anns a Coitcheann tab, cliog air Dèan cinnteach airson ùrachaidhean putan anns a 'phutan Ùrachaidhean Firefox earrann.
4. Chì thu an Tha Firefox air ùrachadh message on the Firefox Updates section.
Note: 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. Cuir air bhog an Firefox app bhon Windows Search bar
2. An ath-, cliog air an Fosgail Clàr-taice Iarrtais putan agus cliog air a ’phutan Cuidich roghainn air an liosta a tha air a thaisbeanadh.
3. Cliog air a 'phutan Troubleshoot Mode… Anns a’ Firefox help uinneig.
4. A-nis, cliog air an Ath-thòisich putan air an Ath-thòisich Firefox ann am modh Troubleshoot uinneag pop-up.
5. Cliog air a 'phutan Ùraich Firefox putan air an Open Firefox in Troubleshoot Mode confirmation window.
6. An uairsin, cliog air an Ùraich Firefox putan air an Refresh Firefox to its default settings uinneig.
7. Mu dheireadh, cliog air an Crìochnaich putan air an 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. Fosgail an Mozilla Firefox app bhon Windows Search bar
2. Cliog air a 'phutan Fosgail Clàr-taice Iarrtais putan agus cliog air a ’phutan Cuidich roghainn air an liosta a tha air a thaisbeanadh.
3. A-nis, cliog air an Troubleshoot Mode… Anns a’ Firefox help uinneig.
4. Cliog air a 'phutan Open putan air an Ath-thòisich Firefox ann am modh Troubleshoot uinneag pop-up.
5. An ath-, cliog air an Fosgail Clàr-taice Iarrtais putan agus cliog air a ’phutan Add-ons agus cuspairean roghainn air an liosta.
6. Cliog air a 'phutan leudachain tab on the left pane of the next window and toggle dheth the add-ons on the window.
7. An uairsin, cliog air an trì dotagan còmhnard button on the add-on and click on the Thoir air falbh button on the list.
8. Cliog air a 'phutan Thoir air falbh 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. Fosgail an Mozilla Firefox aplacaid.
2. Cliog air a 'phutan Fosgail Clàr-taice Iarrtais putan agus cliog air a ’phutan Bookmarks option in the list displayed.
3. Anns a Bookmarks clàr-taice, cliog air an Stiùirich comharran leabhraichean roghainn aig bonn na liosta.
4. Anns a Leabharlann sgrìn, briog air Import and Backup button at the menu bar and click on the Export Bookmarks to HTML… option in the drop-down menu displayed.
5. Anns a 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. Cuir air bhog an Firefox app brabhsair.
2. Seòrsa mu dheidhinn: pròifilean in the URL address bar at the top and press the Cuir a-steach gus an fhosgladh About Profiles uinneig.
3. Cliog air a 'phutan Cruthaich Pròifil Ùr button on the window.
4. An ath-, cliog air an An ath- putan air an Welcome to the Create Profile Wizard.
5. Type a name for the Profile in the Cuir a-steach ainm pròifil ùr raon agus cliog air an Crìochnaich button in the window to create the Profile.
Note: Briog air a ' 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. Brùth air an Iuchair Windows, seòrsa pannal smachd agus briog air a ' Open.
2. Cliog air an roghainn Roinn-seòrsa Anns a’ Sealladh le drop-down menu and click on the Cuir às do phrògram roghainn prògraman cinn.
3. Tagh an Mozilla Firefox (x64 en-US) in the list, click on the dì-stàlaich button at the top of the bar and click on the Tha putan air uinneag UAC.
4. An uairsin, cliog air an An ath- putan anns a 'phutan Mozilla Firefox Uninstall draoidh.
5. An ath-, cliog air an dì-stàlaich button in the next window.
6. Cliog air a 'phutan Crìochnaich button on the last window to completely uninstall the Firefox app.
7. Brùth air an Windows + E iuchraichean together to open the File Explorer and navigate to the This PC > Local Disk (C:) > Program Files > Mozilla Firefox pasgan.
8. Dèan briogadh deas air an Mozilla Firefox pasgan agus cliog air an Sguab às 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. Buail an Iuchair Windows, seòrsa google chrome agus briog air a ' Open.
Note: You can use any web browser to download the Firefox browser on your PC.
2. Fosgail an làrach-lìn oifigeil a ' Brabhsair Mozilla Firefox on Google Chrome and click on the Luchdaich sìos Firefox button on the window.
3. Double-click on the downloaded executable file Firefox installer.exe to run the installation file.
4. Fuirich airson a 'phròiseas stàlaidh a chrìochnachadh.
5. Cuir air bhog an 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. Fosgail an Firefox aplacaid.
2. Cliog air a 'phutan Fosgail Clàr-taice Iarrtais putan agus cliog air a ’phutan roghainnean roghainn air an liosta a tha air a thaisbeanadh.
3. Anns a Coitcheann tab, cliog air Suidhichidhean… putan anns a 'phutan Roghainnean Lìonra earrann.
4. Tagh an Rèiteachadh neach-ionaid làimhe roghainn air an Suidhichidhean ceangail uinneig.
5. Seòrsa SOCKS Host: 127.0.0.1 Port: 9050 Anns a’ Neach-ionaid HTTP achadh, seòrsa 8080 Anns a’ Port field, and click on the OK putan.
6. An uairsin, dèan seòrsa Mu dheidhinn: config on the search bar of the Firefox browser and click on the Gabh ris a ’chunnart agus lean air adhart putan.
7. Finally, type lìonra.proxy.socks_remote_dns anns a’ bhàr sgrùdaidh agus cliog air an toggle button to set the type of the entry to be fìor.
8. A nis, seòrsa https://check.torptoject.org/ in the search bar on the Firefox browser and press the Cuir a-steach key to check the issues with the Tor Browser.
Air a mholadh:
Tha an artaigil a’ bruidhinn mu na dòighean airson a chàradh 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.