Opera is taking a bold stand against what it describes as Microsoft’s anti-competitive tactics to promote its Edge browser. In a formal complaint filed with Brazil’s competition authority, the Norwegian browser company accuses Microsoft of manipulating Windows users into sticking with default settings and limiting access to alternative browsers.
Microsoft Accused of “Manipulative Design Tactics”
According to Opera’s general counsel, Aaron McParlan, “Microsoft thwarts browser competition on Windows at every turn.” The complaint highlights multiple tactics used by Microsoft to make switching browsers harder, including:
- Opening PDFs and links in Microsoft Edge, even when users have chosen a different default browser.
- Forcing links in apps like Outlook and Teams to open in Edge.
- Displaying obtrusive banners and messages when users search for alternative browsers.
- Blocking rival browsers from preinstallation deals with PC manufacturers.
These actions, Opera claims, are designed to keep users locked into the Microsoft ecosystem.
Why Brazil?
Opera’s complaint was filed in Brazil, one of its strongest markets. The browser is currently the third most popular in the country. McParlan says this gives Brazil a unique opportunity to “lead on this international issue,” adding that Microsoft’s tactics affect users worldwide.
What Opera Wants
Opera is requesting several remedies from Microsoft, including:
- Allowing PC makers to preload browsers other than Edge.
- Removing barriers that discourage users from downloading other browsers.
- Ending dark patterns and popups that push users toward Edge.
- Stopping the use of Windows S Mode to limit browser choice in exchange for OEM rebates.
These changes, if enforced, could have a global ripple effect on how browsers are marketed and installed on Windows devices.
A Global Battle
This isn’t Opera’s first run-in with Microsoft. The company was behind the 2007 EU antitrust complaint that led to the browser ballot screen in Windows. Microsoft was later fined $730 million for not complying fully with that ruling.
More recently, Opera tried to challenge the EU’s decision not to designate Edge as a “gatekeeper” under the Digital Markets Act (DMA)—but that effort failed. Now, Opera is appealing that decision in EU courts and continuing its global push to loosen Microsoft’s grip on browser choice.
Microsoft has long been criticized for bundling and promoting its products within Windows. But as pressure mounts from competitors like Opera and regulators around the world, it’s clear that the fight over default browsers and consumer choice is far from over.