Josh Aas has posted an experimental Mac Firefox build that uses the CFRunLoop event system which should drastically improve performance, especially around plugins.
If you're a Mac user, please grab this build and hammer on it for a while. If you find anything that's broken here that's not broken in recent nightly builds, please let me know. If no major regressions turn up or they do and we're able to easily fix them, we might be able to make this change in time for the next Deer Park Alpha.
