Most maybe, but they can contain native binaries (and other things), hence the security warnings.

Actually the would be a way of implementing Jedi that make sense both from the story and game points of view. Make them uber beings, but unable to own land, bank, trade etc (either declaring it against their creed or just have even more powerful Sith NPC's always gank it). This would allow 'casual' gamers that can't invest the time to develop an MMRPG character to play the game. I don't have enough experience to know if this would work for core player, (Last time I had enough time to play these games they were still called MUDs), but could have fun joining in on raids (even if I couldn't share the loot) if I didn't have to first spend days grinding.

I expect it wouldn't take much fiddling with http://mozplugger.mozdev.org/ to get this working. It can plug any X11 window (including a WINE IE6) into Firefox as the handler for a particular MIME type. You would just need to update ieTab to change the MIME type of the pages you wanted to render in IE6. Still not sure why you would want to.