You normally don't. It might be that you are using some extension or some weird privacy-concerned gaming-ish web browser. But if unity games run fine for you, this one should too. (It wasn't made with unity, but the web port is using the something related to unity I believe)
I'm using plain chrome with the only privacy-regarding extension being uBlock, which I don't beleive is related to the problem. I guess I'll just download the game for windows then after trying to tweak some chrome settings
