That may be a deal breaker for you. But for others it's a necessary feature! Firefox added it as a feature and I love it! And I say that as a person with a very anti-Google stance. Perhaps it's an area that is ripe for disruption but without using the browser or Javascript.

They already did this once before by merging Youtube account usernames with Gmail usernames. For me personally, Strike 2 == Strike 3.

I use Firefox on all devices since sometime around 2002 or 2003. Never been upset with it and usually my friends throughout that time all slowly go to Firefox.