Firefox repeatedly crashing

HI,

The best way to fix this issue is to completely uninstall the Firefox from your PC and then reinstall it again.

First uninstall it from your control panel add/remove programs.Then open up My computer then C-drive and open the Programs Folder.In that if you find the Mozilla or Firefox folders just delete them permanently by holding the Shift+delete key.

Similarly open C-drive again and in Windows folder look for Mozilla and firefox folders.If you find them delete permanently.