I assume this means I’ll be able to use a browser extension to catch AMP requests and convert those requests into traditional requests?
Not making an AMP judgement in this comment, just asking if the technical capability exists.
I'd be curious how an extension would know it's an AMP page in this new situation. Is there some new extension API or response property exposed?
Will this load an uncached copy of the AMP version, or the canonical URL as specified by `<link rel=canonical>`?
That is up to the website, some elect to use separate URLs for their AMP content, others serve a different version based on the requestor, others might be AMP-native and not have another incarnation.
How is it up to the website? Can they put a URL in their signed package for the browser to display that won't load the same content if you copy it and paste it into a new location field?