Same as Mozilla partnered with Mullvad for VPN, they could partner with the likes of Ory or Zitadel for ‘Firefox Login’, based on regular OAuth/OIDC rather than the custom stuff that’s been going on.
Let me add a more open and user-respecting alternative to the Google/Facebook/GitHub socials login of my app, and give me a reason to advocate for ‘Firefox Login’ to be added to my favorite services.
From there you can work towards a #nomadicidentity wallet baked into the browser.