What is code ‘XPCOM’ missing on my computer
Firefox will not start ‘could not load CODE XPCOM’ ?
Firefox will not start ‘could not load CODE XPCOM’ ?
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Your thread is at https://support.mozilla.org/en-US/questions/1438518
You posted this thread in the wrong place as it is the Firefox for iOS (for iPhone/iPad) section.
In future use https://support.mozilla.org/en-US/questions/new/desktop https://support.mozilla.org/en-US/questions/new/desktop/form in order to post your threads about (desktop) Firefox on Windows.
I moved the thread to desktop.
@Phillips I found this old thread from 2018 (so I'm not really sure of the accuracy of the solution), but it might worth trying if that could fix your problem.