This is nuts. On a sidenote, any suggestions for an equivalently fast, secure browser for Android 4.2 on a relatively old phone? Not gonna use AOSP anymore!
Opera Classic OK
Opera Mini OK
Tint Vulnerable
Default Vulnerable
Opera has usually worked OK, though sometimes rendering is a bit off. Better than the default browser, especially now.That said, Android 4.4 and later use Chromium for their WebViews, the source for which is developed along with Chrome as a part of the Chromium project - it does not live in AOSP.
Presumably the stock browser that is in AOSP 4.4+ wraps Chromium, which more or less means the AOSP browser is Chrome...but not the other way around. :)