[jscissr]

Not related to the 'not secure' marking, but on the page it says they fixed a medium severity security bug reported in 2014.

> [$500][394518] Medium CVE-2018-6169: Permissions bypass in extension installation . Reported by Sam P on 2014-07-16

And given the relatively low issue number (e.g. http://crbug.com/394520 is from 2014), it's not a typo.

[exikyut]

That issue number is "Intermittently, first key stroke is missed". The two issues it links to also deal with keyboard input. I don't see anything security-related in there.

O.o

[jscissr]

The actual issue is http://crbug.com/394518, which is not public.