WTH???

WHY DO I ALWAYS SEE THIS DAMN POP UP WHEN I ENTER MPGH.NET??? IT SAYS I SHOULD USE FIREFOX BUT I ALREADY DO LOL I JUST KEEP CLICK "NO, IM STUPID" LOL

Someone already made a thread about this and i am not sure why it pops up even though you have Firefox installed.

sorry i didnt knew dat some1 already made a thread about this well ty neways