Trilarion: Using a not very well known browser just for the hope that a website might behave better on it? Nope. I'm too lazy for this. GOG should make their site compliant with major/modern browsers. It cannot be that difficult.
neurasthenya: Just saying, pointing out a very good browser, lightweight, open source, easy to use, and I'm yet to encounter the numerous complaints about "x, y and z" website not working properly on it.
Not well known it is for sure, but that because people are too reluctant, afraid or lazy to make a change.
Oh well... ¯\_(ツ)_/¯
Tried it on my phone (as a "gog application" more than an all-purpose browser, because I really like Opera's speed dial), and it works marginally better : the menu's text and links don't overflow on the web page anymore. But all the rest is still the standard hell. So, not worth keeping a whole browser for one solved issue in GOG's multitude.
GOG is simply a website that doesn't work on android. No big deal, as far as I'm concerned.