Page reload loop when conditional mediation fails

[Kehrlann]

Issue

When running on Firefox, conditional mediation often fails out of the box. Then the JS code redirects me to /login?error, where conditional mediation happens again immediately. This makes Firefox crash.

Sometimes conditional mediation does not throw and error, and the issues only start occurring when the user clicks the "sign in with passkeys" button.

Both Safari and Chrome have slightly different behaviors, with no visible redirect loop, but there are blocking bugs that tend to crash the running tab.

Environment

Running on http://localhost:8080 (no TLS)
No password-manager extension
Firefox developer edition, 132.0b6
MacOS Sonoma 14.6.1

Ideas

• We could avoid triggering conditional mediation when we are in ?error mode
• There might be a need to turn conditional mediation on or off from the API
• For now we'll remove conditional mediation alltogether