Tutorial: Edit text fields in your browser with real Vim/Neovim in a terminal window (Firefox+Tridactyl on Linux)

Just a few moments ago I was a SurfingKeys user, an extension for browser to get Vim inspired key bindings and functionality (and more) in the browser. It also has a feature to edit text areas (like this body text here) in a dedicated popup window to emulate a few Vim like features. It’s nice to have, but I always wanted to...