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Apple OS X Snow Leopard (10.6) is the latest version of the Apple OS. Firefox 3.0 and 3.5 will work on Snow Leopard the same as they do on Leopard.
After you update to Snow Leopard
After you update to Snow Leopard, rebuild the font caches.
- Start OS X in Safe Mode (hold Shift after you hear the startup chime).
- Restart your computer normally.
Do you use Java?
Java content may crash Firefox on Snow Leopard when loading certain pages. To fix this, update to the latest version of Firefox. For instructions, see Update Firefox to the latest version.