Check for viruses or spyware

A number of different viruses and spyware are known to crash Firefox. To ensure that your system clean of spyware and viruses, install, update their virus databases, and use both of these programs:

•  Malwarebytes' Anti-Malware
•  SuperAntispyware Portable Scanner

For more information, see:

•  Is my Firefox problem a result of malware.