The European Union’s top court backed a €2.4 billion EU antitrust fine for Google, a welcome boost for regulators battling Big Tech. The Court of Justice said Google’s practice of favoring its own shopping search results over rival services “was discriminatory.” The ruling can’t be appealed. Judges said that EU law forbids behavior that prevents “the maintenance or growth of competition in a market in which the degree of competition is already weakened, precisely because of the presence of one or more undertakings in a dominant position.” Google was fined in 2017 for how it favored its own shopping search…