[tradesmanhelix]

Mozilla's planned deprecation of XUL-based add-ons sadly makes the future of vim-like extensions doubtful at best on Firefox: https://www.change.org/p/mozilla-save-mozilla-firefox-s-best....

Additionally, qutebrowser has a number of features that Vimium on Chrome doesn't have and probably can't implement due to the limitations of the WebExtension API.