> just asking for an antitrust suit

According to other commenters in here [0], it's an open standard and other identity providers are allowed, not just google

[0]: https://news.ycombinator.com/item?id=44715875

Still an unforgivable violation of trust to have a floating popup over the content that's not part of the DOM and not part of the browser's normal native UI. I never want my browser to inject unblockable overlays over sites I'm trying to browse.