Browser games

Please advise what I can play for free in the browser, what do you play in your free time?

I’d recommend https://vuqq.com/spider-solitaire/ Spider Solitaire online. Nothing fancy, just open it in the browser and play for free. What I like is that you can choose difficulty: start with one suit to learn the basics, then move to four suits for a real challenge. It’s easy to get hooked, but at least it feels like you’re training your patience and logic.