Fenix: [Bug] Crashes while logging in to Google or GitHub

[djc]

Steps to reproduce

1. Login to GitHub (for example, for an OAuth authorization) or Google (for example, to install a Play Store app)

Expected behavior

1. Login proceeds as usual

Actual behavior

Firefox crashes on each attempt. After reopening Firefox, something seems stuck with that origin and it's showing a broken lock even though the URL has a https scheme.

Device information

I've started noticing this for the first time a few days ago, and it's happened a few times since then.

• Android device: Pixel 2
• Fenix version: latest Nightly

[djc]

The latest instance involved logging in to GitHub's new Android app, which I vol es the Oauth authorization flow. I think it was maybe trying to redirect back to the app after authorization? In any case, I managed to make it work after temporarily setting my default browser to Fennec Nightly.

[childnode]

@djc can confirm that custom scheme ends up in

fenix is not "OAuth for native apps" https://tools.ietf.org/html/rfc8252 compatible at this time!

[ricvelozo]

Tried to login in GitHub app today, and I got a "unsupported protocol" error in Fenix. Opening the OAuth link in Fennec worked.

[kbrosnan]

Duplicate of https://github.com/mozilla-mobile/android-components/issues/5555