If anyone is crazy enough to add this yourself, I'll just leave this here: https://firefox-source-docs.mozilla.org/setup/contributing_code.htmlMozilla is clearly not going to do this themselves any time soon. I know it's a big undertaking, but maybe ...
This is LONG overdue, three years at least. See this GitHub issue: https://github.com/mozilla-mobile/fenix/issues/2344Many users have been lost due to this.
