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- Outdated Firefox- The outdated version of the Firefox app may cause this error.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.
Metode 1: Grundlæggende fejlfindingsmetoder
The first approach to solve the Couldn’t load XPCOM error is to try the basic troubleshooting methods listed in this section.
1. Genstart pc'en
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 skal du klikke på Power button at the bottom-left corner, and click on the Genstart mulighed for at genstarte din pc.
2. Kontroller internetforbindelse
An unstable Internet connection may hinder you from using the Firefox browser. You can check the speed of the connection using the Speed test 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. Lancering Indstillinger ved at trykke på Windows + I-taster sammen.
2. Klik på Apps indstilling.
3. Klik på Standard apps på venstre rude.
4. Scroll down and click on the current Webbrowser.
5. Choose from the option as per your preference.
Læs også: How to Fix Firefox Not Loading Pages
4. Slet midlertidige filer
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. Reparer korrupte filer
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. Opdater 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. Kør Windows Update-fejlfinding
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. Udfør Systemgendannelse
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.
Læs også: Fix Your Connection is not Secure Error on 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. Tryk på Windows-tastenSkriv firefox og klik på Kør som administrator valgmulighed.
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. Hit på Windows-tastenSkriv Firefox og klik på Åbne.
2. Klik på Åbn programmenuen button (indicated by the three horizontal lines) at the top-right corner of the home page and click on the Indstillinger mulighed på den viste liste.
3. i Generelt fanebladet, klik på knappen Søg efter opdateringer knappen i Firefox -opdateringer sektion.
4. Du vil se Firefox er opdateret message on the Firefox Updates section.
Bemærk: 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. Start Firefox app fra Windows Search bar.
2. Klik derefter på Åbn programmenuen og klik på Hjælp mulighed på den viste liste.
3. Klik på Fejlfindingstilstand... i Firefox hjælp vindue.
4. Klik nu på Genstart knappen på Genstart Firefox i fejlfindingstilstand pop op-vindue.
5. Klik på Opdater Firefox knappen på Open Firefox in Troubleshoot Mode confirmation window.
6. Klik derefter på Opdater Firefox knappen på Refresh Firefox to its default settings vindue.
7. Til sidst skal du klikke på Finish knappen på Import Complete window to Refresh Firefox completely.
Læs også: 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. Åbn Mozilla Firefox app fra Windows Search bar.
2. Klik på Åbn programmenuen og klik på Hjælp mulighed på den viste liste.
3. Klik nu på Fejlfindingstilstand... i Firefox hjælp vindue.
4. Klik på Åbne knappen på Genstart Firefox i fejlfindingstilstand pop op-vindue.
5. Klik derefter på Åbn programmenuen og klik på Tilføjelser og temaer mulighed på listen.
6. Klik på Udvidelser tab on the left pane of the next window and toggle off the add-ons on the window.
7. Klik derefter på tre vandrette prikker button on the add-on and click on the Fjern knappen på listen.
8. Klik på Fjern 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. Åbn Mozilla Firefox ca.
2. Klik på Åbn programmenuen og klik på bogmærker option in the list displayed.
3. i bogmærker menuen, klik på Administrer bogmærker mulighed nederst på listen.
4. i Bibliotek skærm, klik på Import og Backup button at the menu bar and click on the Eksporter bogmærker til HTML option in the drop-down menu displayed.
5. i Export Bookmarks File window, browse and select a location, and click on the Gem 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. Start Firefox browser app.
2. Type om: profiler in the URL address bar at the top and press the Indtast nøgle til at åbne About Profiles vindue.
3. Klik på Opret en ny profil button on the window.
4. Klik derefter på Næste knappen på Welcome to the Create Profile Wizard.
5. Type a name for the Profile in the Indtast nyt profilnavn felt og klik på Finish button in the window to create the Profile.
Bemærk: Klik på Choose Folder… button to change the location for storing the User Profile name instead of the default location.
Læs også: Fix Firefox is Already Running
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. Tryk på Windows-tastenSkriv kontrolpanel og klik på Åbne.
2. Klik på indstillingen Boligtype i Vis efter drop-down menu and click on the Afinstallere softwaren valgmulighed i Programmer overskrift.
3. Vælg Mozilla Firefox (x64 en-US) in the list, click on the Afinstaller button at the top of the bar and click on the Ja button on the UAC window.
4. Klik derefter på Næste knappen i Afinstaller Mozilla Firefox guiden.
5. Klik derefter på Afinstaller knappen i det næste vindue.
6. Klik på Finish button on the last window to completely uninstall the Firefox app.
7. Tryk på Windows+ E nøgler together to open the File Explorer and navigate to the This PC > Local Disk (C:) > Program Files > Mozilla Firefox mappe.
8. Højreklik på Mozilla Firefox mappe og klik på Slette 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. Hit på Windows-tastenSkriv Google Chrome og klik på Åbne.
Bemærk: You can use any web browser to download the Firefox browser on your PC.
2. Åbn den officielle hjemmeside for Mozilla Firefox browser on Google Chrome and click on the Download Firefox button on the window.
3. Double-click on the downloaded executable file Firefox Installer.exe to run the installation file.
4. Vent på, at installationsprocessen er fuldført.
5. Start Firefox Web Browser app on your PC.
Læs også: Fix No Sound in Firefox on 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. Åbn Firefox ca.
2. Klik på Åbn programmenuen og klik på Indstillinger mulighed på den viste liste.
3. i Generelt fanebladet, klik på knappen Indstillinger ... knappen i Netværksindstillinger sektion.
4. Vælg Manual proxy konfiguration mulighed på Forbindelsesindstillinger vindue.
5. Type SOCKS Host: 127.0.0.1 Port: 9050 i HTTP Proxy felt, type 8080 i port feltet, og klik på OK .
6. Indtast derefter Om: config on the search bar of the Firefox browser and click on the Accepter risikoen og fortsæt .
7. Finally, type network.proxy.socks_remote_dns i søgefeltet og klik på toggle button to set the type of the entry to be sand.
8. Indtast nu https://check.torptoject.org/ in the search bar on the Firefox browser and press the Indtast key to check the issues with the Tor Browser.
Anbefalet:
Artiklen diskuterer metoderne til at rette 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.