For many sports fans, scanning Twitter while watching a game goes together like guacamole and chips.
But waning interest in Twitter and its struggle to add users and captivating features has Facebook jostling to become the go-to TV companion for sports viewers.
The two social media companies will go head-to-head on Super Bowl Sunday with new "second-screen" features that they say enhance the TV-watching experience. Getting more eyeballs onto their services during the most-watched U.S. sports game of the year is also, not surprisingly, a ploy to score more advertising dollars.
Facebook will test its new