Simply put - what websites make you happy when you visit? Perhaps they inspire you, you learn something - whatever it is. Is there one you'd go to on a bad day that might cheer you up?
For me it's the SNES Manual Archive[1], which is a way to browse nearly every single SNES manual. It's the nostalgia angle for me, and I love showing my oldest boy how gaming used to be.
So I'm curious, what are your website "comfort foods", it could be anything inside tech or maybe something completely beyond it. I'd love to find some to add to my bookmarks.
[1]: https://sites.google.com/view/snesmanuals