U.S. regulators want a federal judge to break up Google to prevent the company from continuing to squash competition through its dominant search engine after a court found it had maintained an abusive monopoly over the past decade. The proposed breakup floated in a 23-page document filed late Wednesday by the U.S. Justice Department calls for Google to sell its industry-leading Chrome web browser and impose restrictions designed to prevent Android from favoring its search engine. Regulators also want to ban Google from forging multibillion-dollar deals to lock in its dominant search engine as the default option on Apple’s iPhone and other devices.