Worlds biggest slinger of ads wants to hamstring most adblockers. Not suspicious at all.
If Google are doing this, as they claim, to try and limit rogue extensions, then I'm calling bullshit. Yes, rogue extensions are an issue but the browser providers then need to do a better job of keeping their stores clean, as Google claims to do with their app store.
As an aside, almost every app on my Android phone that I have concerns over regarding excessive permissions is an Android system app. I would love someone at Google to explain to me why every time I get a phone call (yes, those are still a thing) the Play Services app pops up a warning telling me that it can't function without access to my contacts, calendar, location and pretty much everything else.