Sadly Tridactyl (vim keybindings for Firefox) doesn't work in reader mode, which really breaks the flow of my usual scrolling/tab-switching with vim keys. This, and the pdf reader tabs kill me because of it
How much do you care? There's an open pull request you could give a little time to that would fix it by integrating a reader mode into Tridactyl here: https://github.com/tridactyl/tridactyl/pull/3306
: )