I went back to the game on the google chrome browser out of curiosity and that seems to have removed all performance issues; a lot of game's aren't playing nicely on firefox browsers, even my own has an issue or two for them, and that's my main browser I tested on! I'll give you my relevant specs regardless...
I'm on windows 10x64 desktop using a firefox based browser known as "Librewolf", my computer has decent specs but is a little on the older side apart from my gpu and cpu which were replaced more recently; I think almost exactly year ago. It is air cooled.
16 GB of ram
AMD Ryzen 7 5700X 8-Core Processor
NVIDIA GeForce RTX 3060
Kratos M1 550B Power Supply 80 Plus Bronze Certified
465 local storage, 4TB external storage