Opera files antitrust complaint against Microsoft in Brazil, alleging unfair browser restrictions on Windows

Opera has submitted a formal complaint to Brazil’s Administrative Council for Economic Defense (CADE) alleging that Microsoft’s practices unfairly restrict browser choice on Windows devices. The Norwegian company argues that Microsoft’s dominance in the operating system market allows it to give an artificial edge to its Edge browser, at the expense of competitors, such as Opera (naturally), and Brazilian users. SEE ALSO: Opera browser update adds built-in translation, custom cursors, and multitasking tools Opera’s complaint was filed on July 29, 2025, as part of its broader international push for fair competition in the browser market. The company believes Microsoft’s integration… [Continue Reading]