Facebook last month claimed first place among sites for time spent, with 41.1 billion minutes, followed by Google with 39.8 billion minutes and Yahoo! with 37.7 billion, comScore is reporting. However, Yahoo! edged Google for unique visitors, tallying 179 million to the search giant's 178.8 million. Microsoft was third with 165.3 million and Facebook stayed in fourth, with 148 million.