I use Chrome for EVERYTHING to do with Google (gmail, etc.. things I must be logged into the "Services" for), and I use FF for everything else, aka, things I prefer Google not track. (I block a lot of cookies in FF)
In Chrome, I see the same old Google with a wp-admin look-alike-bar at the top. Black. Basic.
In FF, not logged in and blocking as much as I can live with in the form of cookies... Google looks completely different to me, almost Bing-ish, without the nice picture!
Softer colors, styled search button, gray background behind the search box, etc. And... no black bar at the top!
Also worth noting... in FF, I see 1 Adwords ad on the top spot of the results. In Chrome, logged in, there are no ads! I searched for a "BigBrandName TV"... just to compare the look.
Other commercial search results show 3 ads in FF, and only 1 in Chrome. Hmmm that's something different.