Mozilla no longer issues security updates for it and it has many vulnerabilities that are not suited to surfing online anymore. Important Note: Running Firefox 3.6.28 on a Mac poses a serious security threat to your Mac. But Firefox 3.6.28 still works on PPC Macs. Last Updated: MaTo get Firefox for Mac 10.4.11 you need to which is the last version of Firefox to support PowerPC (PPC) Macs.
