Yes, but generally, web apps detect features not browser versions, because UAs are already an unreliable signal of features, from long before BG. Things like p

Yes, but generally, web apps detect features not browser versions, because UAs are already an unreliable signal of features, from long before BG. Things like privacy extensions, screen readers, crawlers have various user agents. At the same time, you make a good point. I'll consider your reflection if I come to re-decide if this is a sensible default.