hello, this appears to be an issue caused by adware/malware on your pc.

1. please go to the firefox menu ≡ > addons > extensions & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc).
2. also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there.
3. finally, run a full scan of your system with different security tools like the free version of malwarebytes & adwcleaner, which are specialised in adware and browser hijackers.

Troubleshoot Firefox issues caused by malware

The file that's causing the crash looks suspicious - try scanning for malware with several antivirus programs. Also see Troubleshoot Firefox issues caused by malware.

If you can, you should upgrade to a newer version of windows, as windows XP is no longer supported by microsoft and has numerous security issues.