SPsp332·Nov 21, 2017
Those are both on the list, but they are not "priorities". https://wiki.mozilla.org/WebExtensions/Future
https://github.com/vimperator/vimperator-labs/issues/705#iss... "The WebExtension APIs offered by Firefox already contain many features that chrome lacks and I am working constructively with them to add the APIs we need to make something a lot like vimperator in Firefox."
In Extensions in Firefox 58