One thing you have to keep in mind is that most of the Macs this browser targets use PowerPC processors, not Intel. The heyday of Linux on PowerPC Macs was around 15 years ago, and most of the support has rotted by now (i.e. you won't be able to run a mainstream distro or even get accelerated graphics). Additionally, by now most people who still keep PowerPC Macs around do so because they have software that will only run on an older version of Mac OS X, or even Mac OS 9 (Tiger was the last version of Mac OS X to have support for running Mac OS 9 software) so running Linux wouldn't be a good option for that reason.