Endless Memory Buildup
I'm having this problem for a couple of months now and I hoped it would disappear with your new design but it didn't. So I'm using this opportunity now.
When I play Geoguessr my memory load goes up very quickly and it doesn't stop. If I had endless RAM it would go up endlessly. But of course I have not.
This makes it sheer impossible to play on my Laptop because it's maxing out very quickly. It only goes down again with reloading the whole page. When the game only loads the next location the memory usage stays full and continues to go up.
I'm not sure when this started happening. I played a lot when the game was new and never noticed any problems. But maybe I was just blind? But I should have noticed it earlier because it gets unplayable very quickly. So it must have started only after a while. A couple of months in maybe.
I made a few tests with Google Streetview on its own. And it doesn't happen there. I can use Streetview for hours without any problems. So it must be something inside Geoguessr itself.