I don't like "back to top" buttons because they take visible space and could be anywhere (if any) depending on the website. I don't like Cmd+Up keystrokes either on my mac.

Instead, it would be great to have something:

- That works on any website

- That can scroll to top, to bottom, and back to the place where you've scrolled from.

- Doesn't alter the websites appearance.

So I've created a tiny Chrome extension that solves all of this: https://github.com/sv3k/topscroll

After some time, you get used to it on reflexes level.