Chrome Version: <From about:version: Google Chrome 61.0.3163.100 (Offizieller Build) (64-Bit) (cohort: Stable)>
Chrome OS Version: <From about:version: Platform Windows (10)>
Network info: <network, encryption type, router model (if known)>

Please specify Cr-* of the system to which this bug/feature applies (add
the label below).

Steps To Reproduce:
(1) Enter any FRITZ!Box router URL (IP:PORT)
(2) Enter user/pwd
(3) Log in

Expected Result:
User/pwd get saved

Actual Result:
Only user gets saved, pwd never gets saved

How frequently does this problem reproduce? (Always, sometimes, hard to
reproduce?)
Always

What is the impact to the user, and is there a workaround? If so, what is
it?
I need to store my pwd for this log-in separately, which is not optimal, since I now store all my passwords in Google Passwords (since it is very trustworthy)

Please provide any additional information below. Attach a screen shot or
log if possible.
Screenshot attached.

Possible reason for this outcome:
I assume the pwd does not get saved, because this router site is claimed as "not secure" because the HTTPS certificate is not verified by an official party, but rather by the router itself. But since this seems to be a common practice (and not really a security issue), Google should allow (on request) to save the pwd anyway.

So at the end, this might be a feature request with the following feature:
Allow users to save passwords from "unsecure" HTTPS sites upon request (for users who know what they are doing).

Thank you.