web.de password fill not working

[Molytho]

Have you searched for an existing issue?

• Yes, I tried searching and reviewed the pinned issues

Brief Summary

web.de recently updated their login flow which broke detection of the password login field.

Expected Versus Actual Behavior

No response

Steps to Reproduce

1. Open https://web.de and click on the login button
2. Enter email address and press continue
3. Now the password field appears but is not recognized

Technical details:
They implement the password field through a custom element and add an input field to it's shadow-root. The issue is that at the point the MutationObserver gets notified about this new element, the shadow-root is still empty.

(password entry element when the MutationObserver is trigger (captured with breakpoint))

(password entry element after the site finished initialising it)

KeePassXC-Browser Debug Information

KeePassXC - 2.7.12
KeePassXC-Browser - 1.10.3
Operating system: Linux x86_64
Browser: Mozilla Firefox 157.0

[Molytho]

Side note since I just found it:
#3115 does fix the issue (as one would expect)

[varjolintu]

This is identical (and same login service as) #2696