Can you help me connect the dots re: the Sherman Antitrust Act of 1890 and Google Chrome's 64% global market share (47% in the US, the country being discussed)?

Can you help me connect the dots re: the Sherman Antitrust Act of 1890 and Google Chrome's 64% global market share (47% in the US, the country being discussed)? I'm having a hard time seeing how those two things are related.