I open up a new tab, type in "sex" in the location bar (with no .com or any other TLD extension), it lags for a while, and then brings up this page...
http://www.hbo.com/city/
I type in "health", it lags for a while, then brings up...
http://www.healthfinder.gov/
I never noticed this feature before. Is this feature standard with all versions of Firefox?