After Grooveshark would continually crash my Firefox browser when loading the site, I did some testing and ended up identifying that it was Convergence that was responsible for the crash. I've been able to reproduce it now on two different Windows 7 (64-bit) machines.
Install Firefox 13.0.1
Install Flash (in my testing, the version doesn't really matter; it would happen with a wide range of Flash versions).
Install Convergence 0.09
Load Grooveshark.com
Watch Firefox crash
And removing Convergence in this scenario will prevent Firefox from crashing.
After Grooveshark would continually crash my Firefox browser when loading the site, I did some testing and ended up identifying that it was Convergence that was responsible for the crash. I've been able to reproduce it now on two different Windows 7 (64-bit) machines.
And removing Convergence in this scenario will prevent Firefox from crashing.