Very similar with good old Enhanced Steam but feels smoother and some other new feature

Enable the add-on.
That alone is 30% CPU usage.
Even on blank pages.

Thank you, the problem solved it

Its almost perfect. But on Linux OS, if extension detects linux operating system, PROTON DB links should be enabled BY DEFAULT (just to make things easier) cause it's important information source for linux users

This extension is great, it turns the store into something useful, collecting all the needed information in one place.
The only minor problem was with the pricing of one bundle, which was I think converted in euro from the price in usd, without considering the taxes (so it was reporting a slightly lower price than it should), but it's understandable.