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When I try to start Firefox it will not come up

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  • 3 have this problem
  • Last reply by philipp

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When I click on Firefox I receive a message that says: Couldn't load XPCOM . I'VE BEEN USING FIREFOX ON MY COMPUTER FOR WELL OVER 15 years. This is the first time I've ever had a problem. What is happening? I had to use my phone because I can no larger get on the internet on my computer. HELP PLEASE!

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hello RAWHIDE57, this can happen usually after you perform a windows system restore. in order to address the issue, please run a clean reinstall:

  1. download the full firefox setup file from
  2. uninstall firefox on the machine through the system control panel
  3. manually delete all remaining files in the firefox program folder, which usually resides in C:\Program Files (x86)\Mozilla Firefox\
  4. reinstall firefox with the setup file you've downloaded in step 1