Does the Mozilla Crash Reporter come up, or you just go straight back to where you were before?

Could you try starting Firefox in its Safe Mode? That's a standard diagnostic tool to deactivate extensions and some advanced features of Firefox. More info: Diagnose Firefox issues using Troubleshoot Mode.

Hold down the Shift key when starting Firefox. A small dialog should appear. Click "Start in Safe Mode" (not Reset).

Does it stay up?

jscher2000, the Mozilla Crash Reporter does not come up. Sorry to report that clicking Start in Safe Mode brings me back to square one, ie it crashes after 1-2 secs again. Shall I try clicking Rest Firefox?

Boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that helps.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/

Perhaps some process on your computer is sending a close command to firefox.exe. You may want to do a little additional scanning: Troubleshoot Firefox issues caused by malware.

Have you tried to Start Firefox in Safe Mode {web link} ?

Some problems occurs when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

• Make sure your Internet security software is up-to-date (i.e. you are running the latest version)

• Remove Firefox from your program's list of trusted or recognized programs, then add it back. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}