Many routers are configured to prioritize tcp over any form of UDP
Every now and then, I hear this, but I have not seen any actual data or evidence of this being the case.
UDP is used for voice-over-IP, which is a large, important technology for the backbone carriers (that carry telephony and internet data interchangeably.)
UDP is also needed for DNS look-ups, which happen before most TCP connections even start; a slow DNS resolver is a more visible source of "slowness" to a user than almost any other reason!
I would be highly surprised if it was general behavior on the internet to drop UDP and favor TCP.
I don't even have Firefox installed, wouldn't this be same as using some another plugin in browser which could enable UDP (maybe unity?).. I mean that I am trying to look this thing from user point of view also - for me, browser based games is awesome because you can just navigate to a website and play. If you kill that idea, it is (almost) same to me than making some desktop app which you need to download. hehe.
if I continue programming games I might use WebRTC within few years from now.
