i can only play rotmg on google chrome

when i try to play it on firefox or ie it gets stuck on the black loading screen

i tried to play with the adobe flash projector to have less lag but there it also gets stuck on the bacl loading screen

is there anything i have to change so it loads the game?

so noone really has an idea what the hell is going on with my firefox browser?
everything else just works fine it just wont load that game

Chrome is faster than firefox so there's no real use of making it work on firefox.
However, the projector IS.
My guess is that you're trying to run the wrong swf or your projector is outdated.

Projector : http://www.adobe.com/support/flashplayer/downloads.html
it's the one labelled "projector" version 11.7

SWF : http://www.realmofthemadgod.com/AGCLoader1371164333.swf
Note that this link changes every time kabam updates rotmg and you'll have to fetch the new link by inspecting the page (right click, inspect elements)

Running a swf file or link in flash projector should be simple enough. PM me if you need help.