Comment 16 for bug 13214

(In reply to comment #9)
> We then give GNOME the name of our own
> executable to run the next time. The way we get this executable is very
> curious, we can't run the binary directly because Firefox launches through a
> shell script. So we make an app-specific pref with the name of the shell script
> to execute from the same directory as the binary.

I think you should be able to just strip the "-bin" off the binary name and use that instead of having a pref. This seems to be what the crash reporter does, and it seems better for other gecko-based apps.