Technology7/29/2025Engadget

Opera takes its browser beef with Microsoft to Brazil in antitrust complaint

Opera takes its browser beef with Microsoft to Brazil in antitrust complaint

Opera, the Norway-based software company, has filed an antitrust complaint against Microsoft in Brazil. The complaint alleges that Microsoft's practice of making Edge the exclusive pre-installed browser on Windows machines creates an unfair environment for competing browsers like Opera. Opera also argues that Microsoft uses design tactics and "dark patterns" to discourage users from downloading and using rival products. The company is asking Brazil's Administrative Council for Economic Defense (CADE) to take action against Microsoft. This is not the first time these two companies have clashed over browser competition. In 2007, Opera sued Microsoft in the EU with a similar argument that bundling Internet Explorer was anticompetitive. Last year, Opera also argued (unsuccessfully) that Microsoft should have a "gatekeeper" designation for the Edge browser under the EU's Digital Markets Act.

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