A couple of years ago I swore I would never leave ff, but they decided to just neuter the add-ons and remove most of them. So I didnt think twice. Moved to waterfox, and then to Palemoon. I'm happy.
I'm sad they're losing, but they need to be adults about it and do what needs to be done. I and many others are waiting to go back as soon as they fix things.
This comment is seemingly a reaction to the post's title and doesn't address (or even acknowledge) the contents of article. Do you disagree with the technical rationale the author has presented?
The content of the article does not really make a technical argument. It just says "XUL can not be fast, because I said so". The code of Firefox has always been a historical grown mess with a lot of loose ends that need to be entangled. I'm convinced that a XUL version can be made fast as well if you spend the appropriate amount of engineering hours on it.
I'm sad they're losing, but they need to be adults about it and do what needs to be done. I and many others are waiting to go back as soon as they fix things.