Google has said it would harm consumers and businesses if it is forced to sell Chrome, the world's most popular web browser.
Judge Amit Mehta ruled Google operates an online search monopoly in August, and has been considering what remedies or penalties to impose.
"The DOJ continues to push a radical agenda that goes far beyond the legal issues in this case," said Google executive Lee-Anne Mulholland in a statement.
Google will also reportedly be asked to establish new measures around its artificial intelligence, Android operating system and use of data.
"The government putting its thumb on the scale in these ways would harm consumers, developers and American technological leadership at precisely the moment it is most needed,” Ms Mulholland added.
Chrome is the most used browser worldwide - with web traffic tracker Similarweb placing its global market share at 64.61% in October.