Pretty fantastic.

The only gripe I have is that it will break "Login with Google"-style auth if (but seemingly only if) the site opens a pop-up window for Google's OAuth flow. I think this is because it instantiates a new window to replace it and breaks the link between child and parent window (i.e. the `window.open` JS call on parent page).

Not sure they can do much about that so it ends up being a pretty serious caveat in some cases.

I mitigate this by taking the opportunity to login in a different browser and change my authentication method away from Google.