Firefox without menu bar and URL bar

Today I succeeded with removing all visual elements from Firefox, except the actual content. This is a bit like surf, but with a modern web engine.

As I said before, one of the things I dislike about modern software is that it tries to manage its own tabs. This creates a lot of problems for people like me, who want to use tiling window managers, because every single app has its own shortcuts to switch tabs. And if you'd like to find a tab by name -- you're doomed.

Anyway, here's a piece of userChrome.css:

#TabsToolbar { visibility: collapse !important; }

#main-window:not([customizing]) #navigator-toolbox:not(:focus-within):not(:hover) {
  margin-top: -45px;
}