If a judge orders Google to sell Chrome, it could dramatically upend the multibillion-dollar online search business.

The Justice Department and a group of states proposed a raft of changes to the business practices of Alphabet Inc.’s Google — including a forced sale of the company’s Chrome web browser — in the wake of a landmark ruling that the tech giant illegally monopolized online search.

The United States Department of Justice argued Wednesday that Google should divest its Chrome browser as part of a remedy to break up the company's illegal monopoly in online search, according to a U.