Firefox would not open in windows 7, profile manager would not start, I already uninstalled and reinstall.
it used to work on this computer and suddenly stopped Uninstalled and reinstalled Profile manager also not opening
Additional System Details
- User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
see this page:
Profile manager would not start I opened the %appdata% and renamed the profiles.ini file Firefox still not opening.
scan your system with:
use malwarebytes in safe mode and normal mode.
I ran malware bytes.. identified two issues, fixed and Firefox is still not opening
and see this answer: