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- Outdated Firefox- The outdated version of the Firefox app may cause this error.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.
Metudu 1: Metodi di risoluzione di prublemi di basa
The first approach to solve the Couldn’t load XPCOM error is to try the basic troubleshooting methods listed in this section.
1. Restart 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 chjave, cliccate nant'à u -Sintinedddi button at the bottom-left corner, and click on the Restart opzione per riavvia u vostru PC.
2. Verificate a cunnessione Internet
An unstable Internet connection may hinder you from using the Firefox browser. You can check the speed of the connection using the Test di velocità 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 taliata pressu Tasti Windows + I nsemmula.
2. Cliccate nant'à applicazioni scatula.
3. Cliccate nant'à Appruntamenti per defettu nantu à u pane di manca.
4. Scroll down and click on the current Web browser.
5. Choose from the option as per your preference.
Also Read: Cumu risolve Firefox chì ùn carica micca e pagine
4. Elimina i fugliali pruvisorii
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. Update 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. Eseguite 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. Eseguite 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.
Also Read: Fix Your Connection ùn hè micca Secure Error in Firefox
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. Premete u Windows key, tipu Firefox è cliccà nantu à u Executà cum'è amministratore funziunalità.
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. Colpite u Windows key, tipu brumann è cliccà nantu Open.
2. Cliccate nantu à u Aprite u menu di l'applicazione button (indicated by the three horizontal lines) at the top-right corner of the home page and click on the taliata opzione nantu à a lista affissata.
3. In u General tabulazione, cliccate nant'à u situ Verificate per aghjurnà buttone in u Actualizazioni di Firefox rùbbrica.
4. Viderete u Firefox hè aghjurnatu message on the Firefox Updates section.
nota: 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. Lanciate u brumann app da u Windows Search bar
2. Next, cliccate nant'à u Aprite u menu di l'applicazione buttone è cliccate nantu à u Aiutu opzione nantu à a lista affissata.
3. Cliccate nantu à u Troubleshoot Mode… in u Aiutu di Firefox finestra.
4. Avà, cliccate nant'à u Restart buttone nant'à u Riavvia Firefox in Modu di Risoluzione di Problemi finestra pop-up.
5. Cliccate nantu à u Refresh Firefox buttone nant'à u Open Firefox in Troubleshoot Mode finestra di cunferma.
6. Allora, cliccate nant'à u Refresh Firefox buttone nant'à u Refresh Firefox to its default settings finestra.
7. Infine, cliccate nantu à u Finisci buttone nant'à u Import Complete window to Refresh Firefox completely.
Also Read: Fix Server Not Found Error in Firefox
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. Grapi lu Mozilla Firefox app da u Windows Search bar
2. Cliccate nantu à u Aprite u menu di l'applicazione buttone è cliccate nantu à u Aiutu opzione nantu à a lista affissata.
3. Avà, cliccate nant'à u Troubleshoot Mode… in u Aiutu di Firefox finestra.
4. Cliccate nantu à u Open buttone nant'à u Riavvia Firefox in Modu di Risoluzione di Problemi finestra pop-up.
5. Next, cliccate nant'à u Aprite u menu di l'applicazione buttone è cliccate nantu à u Add-ons è temi opzione nantu à a lista.
6. Cliccate nantu à u Extensions tab on the left pane of the next window and toggle cumming the add-ons on the window.
7. Allora, cliccate nant'à u trè punti orizontali button on the add-on and click on the Eliminar button on the list.
8. Cliccate nantu à u Eliminar 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. Grapi lu Mozilla brumann App.
2. Cliccate nantu à u Aprite u menu di l'applicazione buttone è cliccate nantu à u RSS opzione in a lista affissata.
3. In u RSS menu, cliccate nant'à u Gestisce i marcati option at the bottom of the list.
4. In u Library screen, cliccate nantu à a Importazione è copia di salvezza button at the menu bar and click on the Esporta i marcati in HTML... option in the drop-down menu displayed.
5. In u Export Bookmarks File window, browse and select a location, and click on the Cruciani buttone per salvà u schedariu di marcatura.
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. Lanciate u brumann app navigatore.
2. Type circa: prufili in the URL address bar at the top and press the Rinsignate chjave per apre u À propositu di i Profili finestra.
3. Cliccate nantu à u Crea un Novu Profilu buttone nantu à a finestra.
4. Next, cliccate nant'à u Next buttone nant'à u Benvenuti à l'Assistente di Crea Profile.
5. Type a name for the Profile in the Inserite u novu nome di prufilu campu è cliccate nant'à u Finisci buttone in a finestra per creà u Profile.
nota: Cliccate nant'à u Choose Folder… button to change the location for storing the User Profile name instead of the default location.
Also Read: Fix Firefox hè digià in esecuzione
Metudu 7: Reinstalla 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. Premete u Windows key, tipu pannellu di cuntrollu è cliccà nantu Open.
2. Click on the option Catigurìa in u Vede da drop-down menu and click on the Uninstall un prugrammu opzione in u Programs testa.
3. Sceglite u Mozilla Firefox (x64 en-US) in the list, click on the Uninstall buttone in cima di a barra è cliccate nant'à u Iè buttone nantu à a finestra UAC.
4. Allora, cliccate nant'à u Next buttone in u Disinstalla Mozilla Firefox mago.
5. Next, cliccate nant'à u Uninstall button in the next window.
6. Cliccate nantu à u Finisci button on the last window to completely uninstall the Firefox app.
7. Premete u Windows+ E chjavi together to open the File Explorer and navigate to the This PC > Local Disk (C:) > Program Files > Mozilla Firefox cartulare.
8. Cliccate cù u dirittu nantu à u Mozilla Firefox cartulare è cliccate nant'à u cancillari 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. Colpite u Windows key, tipu google chrome è cliccà nantu Open.
nota: You can use any web browser to download the Firefox browser on your PC.
2. Open u situ ufficiali di u Navigatore Mozilla Firefox on Google Chrome and click on the Scaricate Firefox buttone nantu à a finestra.
3. Double-click on the downloaded executable file Firefox Installer.exe to run the installation file.
4. Wait for the installation process to complete.
5. Lanciate u brumann Web Browser app on your PC.
Also Read: Fix No Sound in Firefox in Windows 10
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. Grapi lu brumann App.
2. Cliccate nantu à u Aprite u menu di l'applicazione buttone è cliccate nantu à u taliata opzione nantu à a lista affissata.
3. In u General tabulazione, cliccate nant'à u situ Impostazioni ... buttone in u Network Settings rùbbrica.
4. Sceglite u Manual proxy configuration opzione annantu à Impostazioni di cunnessione finestra.
5. Type SOCKS Host: 127.0.0.1 Port: 9050 in u Proxy HTTP campu, tipu 8080 in u Port field, and click on the OK buttone.
6. Allora, tipu À propositu: config on the search bar of the Firefox browser and click on the Accetta u Risicu è Cuntinuà buttone.
7. Finally, type network.proxy.socks_remote_dns in a barra di ricerca è cliccate nantu turnari button to set the type of the entry to be vera.
8. Avà, tipu https://check.torptoject.org/ in the search bar on the Firefox browser and press the Rinsignate key to check the issues with the Tor Browser.
ricumandatu:
L'articulu discute i metudi di riparà 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.