I was unable to load the online-go site on Tint Browser on Android, Firefox on Arch Linux and Chrome on Fedora. Oddly enough, I was finally able to access the site when I thought to try it on Midori.
When I try to load it on one of the problematic browsers, the icon spins and it says that the site is loading, but the site never actually does finish loading.
Hmm, Firefox on arch and chrome in Linux in general are very well tested and work great, if you’re having problems with those you might have some other issues somewhere - if you have any extensions installed try opening up a private/incognito window to try the site in (this will implicitly disable your extensions and tends to work a lot better)