So how does this change anything?
But it can't keep XUL compatibility and do major overhauls of the browser.
If XUL compatibility doesn't even get you a clear advantage in the add-ons area, should it block modernizing the browser?
Firefox can't be the browser that people use only because they're stuck on it because they have extensions that changes how the browser works. Think about that for a bit.
I just don't see how any of that is relevant to the original comment I replied to:
> But will Google allow this to happen, as it would strip them a huge selling point for Chrome?
In what way would standardizing WebExtensions, which are already supported by all modern browsers (sans Safari), strip Chrome of selling points?
Why should Google have to "allow" this?
Standardized WebExtensions dilute that, because they allow easy ports to the other browsers.
(I'm sure this was an important consideration for Mozilla as well - it reduced the supposed value of their "more powerful" XUL extension system, as in practice you can often find a Chrome extension to do what you want, but not a Firefox one)