I have turned on the VIM keybindings in Firefox developer tools. I have read the question and answers at https://support.mozilla.org/en-US/questions/1057797 The problem is that everywhere else that I use Vim, escape is what gets me into normal mode. I don't want to retrain myself to Ctrl-C. Is there an about:config setting that I can use to: 1. Make Esc the vim "normal mode" shortcut instead of Ctrl-C 2. Disable the current use of Esc in developer tools, which currently discards your changes and goes back to readonly/viewing mode instead of the "Edit html" mode.