Today I continued with mine browser crashing program. I reworte it with php and postgresql. It should be installed at a web server and the just point your browser to the php script. The php script creates a random html page and after 500ms it reloads the page and display another html file until it crashed. There is also a script for automtic restarting the browser after a crash
The script was successfull with firefox, it crashed a couple of times.
The files can bedownloaded here
Note: This is a quick hack. Maybe it doesn't work or damages your computer.