Opera has lodged a formal complaint against Microsoft with Brazil's anti-trust authority, CADE, alleging unfair practices that favor Microsoft's Edge browser over competitors. The complaint claims Microsoft influences PC manufacturers to pre-install Edge as the default browser and employs "manipulative design tactics" that make it difficult for users to switch to other browsers. Opera highlights issues such as intrusive banners discouraging downloads of alternative browsers and automatic redirection to Edge for PDFs and email links. Opera is urging regulators to stop these practices and implement a fair browser selection screen. Previous attempts to classify Edge as a gatekeeper under the Digital Markets Act were unsuccessful.