Many thanks for this informative post. I’ve read quite a few of the official Mozilla communications (announcements, blog posts, etc.) and so far, this has been

Many thanks for this informative post. I’ve read quite a few of the official Mozilla communications (announcements, blog posts, etc.) and so far, this has been the best explanation I’ve read for the impetus to move from XUL-based add-ons to WebExtensions. I write this from the perspective of a user who will lose almost half of their current extensions when they upgrade to 57.