>For me this is a bridge too far: I don't care to tell google about every single extension/application (extensplication?) I'm using.
Oh for pete's sake...Is there anything to this " I suppose next they'll see what email providers I use and whom I correspond with with mutt or whom I chat with on other services with finch etc.. Why expand google's data-gathering "attack surface"?
Or is it further chicken-little, slippery slope conjecture with no basis in reality? Keep in mind that you're connecting to their web store to download this, even sans login. That means they have your IP, and a metric ton of identifying information about you via your browser fingerprint (ala Panopticlick). Complaining about signing in just seems rather silly. Oh noes! They know that you downloaded an extension!
You'll have to forgive me for being blunt. This particular absurd line of thought is starting to seriously become an annoyance - even the chans have latched onto it. Correcting people who have the wrong idea is getting old.