Cannot get login callback after authorized login success via built-in browser on Thunderbird Mobile

[icedkong]

Checklist

• I have used the search function to see if someone else has already submitted the same bug report.
• I will describe the problem with as much detail as possible.

App

Thunderbird for Android

App version

18.0

Where did you get the app from?

Other

Android version

Android12

Device model

No response

Steps to reproduce

1.Launch Thunderbird Mobile
2.Jump to built-in browser for authorized login
3.Complete account authorization and login in the browser
4.Observe the app side: no login success callback is triggered

Expected behavior

After authorized login succeeds in the built-in browser, the browser should trigger the callback and return login result to the app normally.

Actual behavior

Login is completed inside the built-in browser, but the app never receives the login success callback, causing the login process stuck.

Logs

No response