A large proportion of our startup time is spent on loading the Firefox library(.dll, etc) files. This is true on all of our platforms. In my previous post I thought I discovered a way to load the Firefox binaries more efficiently on Windows(bug 627591). Further testing revealed that to not be true in all cases and that the Windows Prefetch service was still killing our startup speed. Microsoft does not seem to provide a way to opt out of the Windows Prefetch ‘service’.

This addon does not yet work on XP because I do not yet have an XP enviroment to test/develop in (patches are welcome).