When using browser.identity.launchWebAuthFlow with Google OAuth, everything works fine except that once I’ve authenticated with Google, the window that was used for auth hangs. The status is “Waiting for accounts.google.com…”, with the URL being “https://accounts.google.co.uk/accounts/SetSID”. After about two minutes, the status changes to “Connecting to .extensions.allizom.org…”, and about a minute after that, the window closes and fulfils the promise from browser.identity.launchWebAuthFlow.
If I close the window manually once I’ve authenticated with Google, it seems authentication still succeeded since the next call to browser.identity.launchWebAuthFlow works without a prompt.
This happens with the google-userinfo sample: https://github.com/mdn/webextensions-examples/tree/master/google-userinfo
If anybody has any ideas what the cause is or how to fix it, that’d be much appreciated.