Windows 10: Firefox "can't load XPCOM" - even with complete fresh reinstall

Discus and support Firefox "can't load XPCOM" - even with complete fresh reinstall in Browsers and Email to solve the problem; I have tried seemingly everything bar reinstalling Windows 10 to try to get Firefox to work again. I've moved my profile to an external HDD, and... Discussion in 'Browsers and Email' started by Gaz1701, Jun 19, 2017.

  1. Gaz1701 Win User

    Firefox "can't load XPCOM" - even with complete fresh reinstall


    I have tried seemingly everything bar reinstalling Windows 10 to try to get Firefox to work again.

    I've moved my profile to an external HDD, and deleted everywhere I know that Firefox is located:
    • C:\Program Files\Mozilla Firefox (OR)
    • C:\Program Files (x86)\Mozilla Firefox
    • C:\Users\*username*\AppData\Local\Mozilla\Firefox
    • C:\Users\*username*\AppData\Local\Mozilla\updates
    • C:\Users\*username*\AppData\Local\VirtualStore\Program Files\Mozilla Firefox
    • Plus even the 'roaming' ones, too
    AND used the Advanced scan with Revo Uninstaller to remove every other trace of Firefox - registry included.

    But after [the ridiculously long process of] reinstalling firefox, the same error message still keeps appearing!
    I've ran out of ideas (and running out of patience) as to why it still keeps saying this.

    I don't know if it's just because my computer's so old or not, but seems to take at least something like 10 minutes to install it! And to keep on trying to uninstall it and reinstalling it all the time seems to take forever.

    Any help will be much appreciated. I don't like the other webbrowsers, and for the time being I'm using a Mozilla-based on called CLIQZ - but I can't install any addons to it, as it's a "privacy browser".


    *edit* sorry, didn't see the 'Browsers and Email' section there, my bad *Redface

    :)
     
    Gaz1701, Jun 19, 2017
    #1

  2. HELP

    OH another tihng. Only edge browser is working. Isnt it a exe data ,too?

    Firefox says couldnt load XPCOM
     
    LouisWagnerXD, Jun 19, 2017
    #2
  3. musum Win User
    " SOFTWARE UPDATE FAILED "

    SO HERE'S THE LINK TO THAT PIC

    http://i26.tinypic.com/2ihbdco.jpg

    CAN U PLZ CHECK IT ACTUALLY I HAVE USED THE NOKIA SOFTWARE UPDATER B4 ... BUT I DONT KNW WHY I M GETTING THIS ERROR NOW
     
    musum, Jun 19, 2017
    #3
  4. If you go to Index page mozillaZine Forums and type "xpcom" (without the quotation marks, cf course,) in the box entitled Search Boards" on the right side of the screen, you will see a lengthy set of replies, some of which might have useful information for you.
     
    Not Myself, Jun 20, 2017
    #5
  5. Gaz1701 Win User
    Sorry for the late reply, I've tried the suggestions they put on there:

    It worked ONCE [and once only], but after restarting Firefox, the same message appears again! I've posted what I've done so far on their forums

    Ps. Thanks for the info on what XPCOM is Josey Wales, but there's far too much to read - and I don't really understand it anyway (or how it could be useful to me)
     
    Gaz1701, Jun 24, 2017
    #6
  6. Then why care if you can't open it??*Wink
     
    Josey Wales, Jun 24, 2017
    #7
  7. pyramid10 Win User

    Firefox "can't load XPCOM" - even with complete fresh reinstall

    You may want to visit palemoon dot org, and check out their browser(s) as alternative(s) to the privacy browser you are now using.

    Mozilla/Firefox is moving closer to a WebExtension add-on only browser (version 57?).

    Pale Moon, as a forked Firefox browser and further developed independently from Mozilla, can accept non-WebExtension add-on's with the exception of JetPack add-on's. And no Australis! Progress has its gains and losses.
     
    pyramid10, Jun 25, 2017
    #8
  8. Gaz1701 Win User
    I don't quite know how I've gotten it to work, but I've had much bigger issues with the internet on my Desktop not working - but I'll post that as a separate thread in the relevant place.

    Thanks for the suggestion pyramid10, I'll have to try it out *Smile
     
    Gaz1701, Apr 5, 2018
    #9
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Firefox "can't load XPCOM" - even with complete fresh reinstall

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