I can't really tell whether this is an official Mozilla website (though it looks like one), but the feature is certainly an official one on the roadmap. See thi

I can't really tell whether this is an official Mozilla website (though it looks like one), but the feature is certainly an official one on the roadmap. See this earlier discussion: https://news.ycombinator.com/item?id=17624709 https://news.ycombinator.com/item?id=17624709