ComScore, which tracks Internet use, said Yahoo! lost 0.5 percent of its market share, sliding to 17.5 percent. Microsoft's Bing took advantage of that, gaining 0.4 percentage points by climbing to 10.3 percent of the market, PC World reported Wednesday.
Google took what was left from Yahoo!'s slide with its share rising one tick to 65.6.
The findings are not consistent with last week's numbers released by Hitwise that said Microsoft's Bing, with 9.3 percent of the market share, lost ground in November.
Yahoo! has lost 2.9 percent of its market share since November 2008, PC World said.
Copyright 2009 by United Press International.