I was tired of emailing myself websites from my mobile device that I wanted to look at later on a bigger screen, so I created linkhere last weekend. It's a simple browser extension that unobtrusively shows websites saved from your mobile device in new tabs on Firefox and Chrome, while being completely self-hosted and private.

Repo with instructions and demo GIF: https://github.com/link-here/extension

Let me know in the comments / open a new issue on what needs to be documented better.