UPDATE: Get the keyfixed firefox 3 final here.

Here’s how to patch Firefox 3 to make the “home” and “end” keys work like they work in other OS.

1. Close Firefox (If open).
2. Browse to Applications > Firefox
3. Right Click > Show Package Contents
4. Browse to Contents > MacOS > Chrome
5. Rename/Remove toolkit.jar and replace it with this (toolkit.jar) one.

Done!

Tested on Firefox 3.0b2

All Credits to StarryHope for making the original version.