I could be wrong, but I think you are simply mistaken because there should be absolutely no possible way for the PWA to install a browser engine onto your device? The user can first install the browsers of their choice, separately, and then install PWAs using that browser.
That would be a huge concern and really contradict the entire point and purpose behind PWAs as I understand them… I’ve been searching but can’t find anything like what you say. I’d love to see your source
@sabreW4K3 @boredsquirrel What do you use instead?