Google has grabbed a 90% market share in search in the U.S. in recent years, according to government estimates.
Rather, the makers of phones and web browsers set Google search as their default because they wanted to deliver the "highest quality" experience for their customers, Google claimed in its January filing.
The Justice Department has the burden to show that Google's business deals harmed competition for search.
The trial court in that case found Microsoft unlawfully tried to block rival browser Netscape Navigator.
The Google trial at the U.S. District Court for the District of Columbia is expected to last about 10 weeks.
Persons:
Alphabet's, Rather, Judge Amit Mehta, Barack Obama, Mehta, Peter Navarro, Donald Trump, Stewart Rhodes, Mike Scarcella, Amy Stevens, Diane Craft
Organizations:
Microsoft, U.S . Justice Department, Apple, Google, Mozilla, The, Department, GOOGLE, Justice, DOJ, Netscape, U.S, District of Columbia, WHO, U.S . Foods, U.S . Capitol, Thomson
Locations:
Washington, U.S