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

This thread was archived. Please ask a new question if you need help.

Firefox is blocked on my computer. How do I fix this?

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by philipp

Wuorir
Wuorir
more options

When I click on Firefox, a message comes on stating "can't load XPCOM." I tried turning off the firewall and numerous scans and troubleshooter tools to no avail. How do I fix this? Thank you for your time.

When I click on Firefox, a message comes on stating "can't load XPCOM." I tried turning off the firewall and numerous scans and troubleshooter tools to no avail. How do I fix this? Thank you for your time.

All Replies (1)

philipp
philipp
  • Moderator
more options

hi Wuorir, this is a problem that is usually caused by a windows system restore. please first try a clean reinstall of firefox:

  • download the full firefox setup file from https://www.mozilla.org/firefox/all/
  • uninstall firefox on the machine
  • manually delete all remaining files in the firefox program folder, which usually resides in C:\Program Files (x86)\Mozilla Firefox\
  • reinstall firefox

in case this did not help, the xpcom error message at startup might also be caused by third-party security tools: http://kb.mozillazine.org/Browser_will_not_start_up#.22Couldn.27t_load_XPCOM.22_error