BRUSSELS :Brazil's antitrust enforcer CADE has opened an investigation into Microsoft, days after Norwegian browser Opera complained about Microsoft's Edge, according to a CADE statement published late Thursday on its website. Opera, in its complaint filed on Tuesday, alleged that Microsoft pre-installs Edge as the default browser across Windows devices and computers, thereby preventing rivals from competing on the merits of the products. Opera had 6.78 per cent of the Brazilian desktop browser