I don’t know. I’m hoping that after their attempts at building an ad network fail, they pivot back to developing a browser by focusing on features their users actually want. Or maybe by the time Mozilla fails another alternative springs up, like Ladybird.
To your point, cloning Proton is such an obvious path forward to generate revenue while staying true to their values. Even selling a Firefox Pro with an annual fee offering some developer-specific or power-user features would be great.