UPDATE:The game is no longer Free to Play.
QUAKE LIVE started as a web browser, game developers decided to make the game as a standalone, downloadable game by the end of 2013. Linux and Mac support will be available only through emulation or virtualization software, the desktop version will not have native support Mac and Linux versions. Well this could be a good thing for WarFace too, if they will ever decided to make a desktop version.
That’s great, hope it’ll be portable too.