I've currently found out this ones unused.
webPushIntegration removed because looks like all fatal bugs solved as it said from note.

for #11617 added a resetPoliciesAfter ext function for StrictMode, and replaced all existing calls to "resetAfter" with "resetPoliciesAfter" (#11619)

This helps because we will always need the observer to be initiated, not only when the `openToBrowser` method gets called. Example: Opening a tab from the tab tray had it's own method for opening the browser, causing this to not be called.

The end result is that Android Studio can be used in Windows to build Fenix
when using the "local publish" workflow managed by settings.gradle -
android-components publishes automatically, although it's necessary to
manually public application-services because it doesn't build on native
Windows, only via WSL. So instead of trying to build it, it just
prints a message indicating the manual build is necessary.