I've tried the gooogle addy with Network Shield warnings turned both on and off, and in neither case do I see anything from avast, just the "page not found" thing from Firefox. Like mutu, I thought there was supposed to be a popup warning from avast, or maybe that warning line at the top like Firefox and many of its extensions use. Am I missing a setting there?
Oh, and yes I am updated to 1282, since its final release last night or this morning.