This happens on every device I have Firefox Android installed on, since I started using Firefox on Android maybe 2 years ago, up until the current beta release

This happens on every device I have Firefox Android installed on, since I started using Firefox on Android maybe 2 years ago, up until the current beta release today. As another commenter pointed out, it seems to work fine if you use a UA switcher to fake Chrome Android on google.com. Besides, AMP isn’t browser-specific. AMP pages render properly in Firefox when I tap AMP articles from the Google News app.