Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Hierdie gesprek is in die argief. Vra asseblief 'n nuwe vraag as jy hulp nodig het.

FIrefox no longer working after latest Windows 10 update

  • 3 antwoorde
  • 1 het hierdie probleem
  • 1 view
  • Laaste antwoord deur cor-el

SnappyHapper
SnappyHapper
more options

Last night, my Windows 10 laptop (annoyingly) ran an update and restarted my system while I was uploading some photos onto a website. I have been using Firefox with (relatively) few problems. However, on logging back in after this update in Windows 10 (30th Sept 2015), Firefox has refused to open up, telling me that it 'Couldn't Load XPCOM'.

Having looked at similar problems on this site, I have manually uninstalled all Mozilla files, and reinstalled with the latest version twice, but I still get this 'couldn't load XPCOM' message when I try to start Firefox.

This leaves me with the only option of Microsoft Edge as a browser. Have mercy and help me fix this soon!!!

Last night, my Windows 10 laptop (annoyingly) ran an update and restarted my system while I was uploading some photos onto a website. I have been using Firefox with (relatively) few problems. However, on logging back in after this update in Windows 10 (30th Sept 2015), Firefox has refused to open up, telling me that it 'Couldn't Load XPCOM'. Having looked at similar problems on this site, I have manually uninstalled all Mozilla files, and reinstalled with the latest version twice, but I still get this 'couldn't load XPCOM' message when I try to start Firefox. This leaves me with the only option of Microsoft Edge as a browser. Have mercy and help me fix this soon!!!

All Replies (3)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

I think it indicates that the updater/installer glitched and one or more files in your program folder are missing or corrupted. For that, I suggest:

Clean Reinstall

We use this name, but it's not about removing your settings, it's about making sure the program files are clean (no inconsistent, corrupted, or alien code files). As described below, this process does not disturb your existing settings. Do NOT uninstall Firefox, that's not needed.

(A) Download a fresh installer for Firefox 41.0.1 from https://www.mozilla.org/firefox/all/ to a convenient location. (Scroll down to your preferred language.)

(B) Exit out of Firefox (if applicable).

(C) Rename the current program folder, either:

(64-bit Windows folder names) 

C:\Program Files (x86)\Mozilla Firefox

to 

C:\Program Files (x86)\OldFirefox

(32-bit Windows folder names) 

C:\Program Files\Mozilla Firefox

to 

C:\Program Files\OldFirefox

(D) Run the installer you downloaded in (A). It should automatically connect to your existing settings.

Will Firefox start?

Note: Some plugins may exist only in that OldFirefox folder. If something essential is missing, look in these folders:

  • \OldFirefox\Plugins
  • \OldFirefox\browser\plugins
jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
more options

By the way, have you shut down and restarted Windows since this problem began? Occasionally after updates Windows seems to start with privilege issues where it only has partial access to your user account. Restarting Windows has fixed otherwise inexplicable problems in several threads.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

What security software do you have?

This usually happens because of a failed Firefox update that left you with a mixture of old and updated files in the Firefox program folder. This can happen if your security software keeps a handle on files in the Firefox program folder.