Google’s Cash Makes Rivals Less Eager for Antitrust Crackdown

After the government sued Google as a monopolist, Mozilla Corp., you’d think, might have celebrated. Mozilla makes Firefox, a web browser that Google undercut by using massive engineering resources, financial muscle, and—according to ex-Mozilla staffers—dirty tricks to promote its own Chrome. The smaller company has periodically raised alarms about Google’s business practices and once even put up a billboard in the Bay Area that read, “Big Browser Is Watching You,” with the word “browser” fashioned to resemble Google’s logo.

Yet within hours of the federal Department of Justice filing its antitrust lawsuit against Alphabet Inc.’s Google on Oct. 20, ...