The letter is addressed to Satya Nadella, and its title leaves little room for interpretation: “Dear Microsoft, Enough is Enough.” Published June 3 by the Browser Choice Alliance, a coalition of browser developers that includes Google Chrome, Opera, Vivaldi, Midori, BrowserWorks and Wavebox, the open letter accuses Microsoft of abusing its control of Windows to steer users toward its Edge browser, and it demands a list of specific changes, worldwide and immediate.
The alliance’s catalog of complaints is detailed. Microsoft, it says, offers economically coercive all-or-nothing rebates that keep rival browsers off new Windows devices, prevents users from uninstalling Edge, shows intrusive and confusing messages in Microsoft’s exclusive promotional areas when users try to download competing browsers, and uses system updates to push users back toward Edge. It says Microsoft ignores the user’s chosen default browser for links opened inside Teams and Outlook, hardwires Edge into key access points of Windows, including Search and Widgets, and blocks rivals’ one-click switching features for changing the default browser.
The requested remedies match the complaints: let browser makers compete for preinstallation and default deals, end the dark patterns around downloading rivals, restore simple one-click default switching for all file types, open links in the user’s chosen browser, eliminate the Edge banners that appear during searches for other browsers, stop using updates to steer users, and remove the S mode restrictions that block third-party browsers on some devices.
Microsoft has not publicly responded to the letter. The company has repeatedly said it offers users choice and that Edge provides a competitive experience, and it has defended its placement of the browser as standard Windows practice. The silence, and the specific language of the complaint, suggests the two sides are far apart.
The fight is not new; it is a rematch with updated technology. Two decades ago, European regulators forced Microsoft to change how it bundled Internet Explorer with Windows, and in 2010 the company agreed to show European users a browser choice screen. When regulators found it had failed to honor that commitment, they fined the company 561 million euros in 2013. The current dispute follows the same template, with Edge standing in for Internet Explorer and Windows 10 and 11 in place of the XP and 7-era operating systems that triggered the original case.
What has changed is the stakes. Browsers are no longer just gateways to web pages; they are the front doors to AI assistants, identity systems, advertising and, increasingly, the operating system itself. Microsoft has integrated its Copilot assistant into Edge and Windows, and rivals argue that the same tactics used to protect Edge’s share now protect Microsoft’s AI distribution. The browser choice debate has become an AI distribution debate, which is why the coalition’s members, including the world’s largest search engine, are treating it as an existential issue rather than a technicality.
The alliance previously petitioned the European Commission in 2024 about Microsoft’s browser practices, and this letter escalates the campaign by addressing the chief executive directly. The regulatory terrain has shifted since the IE era: the European Union’s Digital Markets Act imposes new obligations on gatekeepers, and regulators in Britain and the United States have shown more appetite for challenging dominant platforms than at any time since the original browser case.
The coalition’s membership is itself a statement. Mozilla, whose Firefox would benefit from weaker Edge promotion, is not a member, and the alliance says its members compete with one another on every platform except this one. The letter argues that browsers should compete on merit, and that Microsoft’s tactics restrict user choice on roughly a billion and a half Windows PCs around the world.
The alliance’s case is also complicated by the fact that its most prominent member is under regulatory attack for its own default deals. The Justice Department has pursued remedies against Google’s agreements to be the default search engine and browser on devices, and a federal court has weighed forcing the company to sell Chrome. Microsoft has pointed to that record in the past, arguing that the browser market’s real bottleneck is Google. The exchange leaves regulators with the awkward task of policing defaults from two directions at once.
History offers Microsoft a warning it has already paid for once. The 2010s browser choice case cost the company hundreds of millions in fines and years of regulatory oversight, and it ended with the browser market more open than it had been. Whether the current campaign produces a similar outcome depends on regulators, on the courts, and on whether the alliance’s evidence, including a recent Mozilla-funded study documenting the tactics in detail, translates into enforcement. Microsoft has not said whether it will change course. The letter is now public, the demands are on the record, and the next move belongs to the company that, two decades ago, promised to do better.
