Google Inc. and Microsoft Corp. had a slight increase in their shares of the U.S. online-search market in November, according to market research firm comScore Inc.

Google remained the dominant search leader, handling 65.6 percent of the 14.4 billion queries, up slightly from 65.4 percent in October, comScore said. That was up 0.2 percent from October.

Third-place Microsoft, whose Bing search engine debuted in June, gained 0.4 percentage points from a month earlier to 10.3 percent, while No. 2 Yahoo fell 0.5 percentage points to 17.5 percent.

IAC/InterActiveCorp's handled 3.8 percent of all search queries in November, down 0.1 percentage points from the previous month, and handled 2.8 percent, also down 0.1 percentage points.

The total number of searches rose 1 percent in November from the month before.

For social networking sites, Facebook saw 8 percent growth while MySpace, owned by News Corp. dropped 7 percent.