i used firefox, windows 10, and my cpu (which i will admit is quite bad since its fairly old) is an intel i5-2400
i also don't have a dedicated gpu, which affects how games run a LOT (and the cpu graphics drivers haven't gotten a new update since 2016, so a lot of newer games just wont run period,,)
The browser version is considerably more demanding so yeah your setup seems like a bad match, a desktop version is in the works which should run decently better on your end!
