I don’t understand what tab groups are from the description in the article. How are they different from keeping groups of tabs in separate browser windows? Is this just something I don’t understand because I don’t keep tabs open forever?

If your bank doesn’t offer virtual credit cards (or they’re a pain to use) and you don’t want to sign up with another service, then yeah - PayPal is safer to give than your credit card number.

Or, seriously, a PS5 slim. (Actually slim, not the slight redesign they did.)

I felt the same, but I’m reading through this book and so far it’s been helpful for understanding and setting up system flakes: https://nixos-and-flakes.thiscute.world/