Show HN: I Made a (Firefox) Tab Groups Replacement

I should highlight the fact that this started as a fork of another add-on: https://addons.mozilla.org/en-GB/firefox/addon/panorama-view...

I've added tab hiding, moveable/resizeable groups, support for pinned tabs and a few other things. The goal is to make it feel as close as possible to the original Tab Panorama.