hi Rbeliever3, 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 thrid-party security tools: http://kb.mozillazine.org/Browser_will_not_start_up#.22Couldn.27t_load_XPCOM.22_error

I'm running Firefox Portable (Portable Apps). I've tried starting FF in Safe mode, reloading the portable App, Running a completely stock version of FF Portable, did a PC restart, and a hard boot. No results

Hi CH2OH5

Could you please start a new thread for your question?

Then you can provide more information like your operating system and installed extensions and installed plugins.

• [start a new thread]
• [/kb/Using+the+Troubleshooting+Informatio...]