A Mozilla-commissioned study released July 14, 2026, accuses Microsoft of persistently steering Windows users away from rival browsers — and reveals the company already knows how to stop. The report, Over The Edge 2.0, documents multiple "dark patterns" in Windows 10, Windows 11, Edge, Bing, Windows Search, and Copilot that nudge users toward Microsoft's browser. Crucially, the researchers found that several of these behaviors disappear or weaken when the same Microsoft products are used inside the European Economic Area, suggesting the nudges are deliberate commercial choices rather than technical necessities.

The Nudge Arsenal: From Bing to Copilot

The report, produced by deceptive-design researchers Dr. Harry Brignull and Cennydd Bowles, expands on a 2022 study by testing browser-choice journeys across the United States, United Kingdom, India, and Germany (as a proxy for the European Economic Area). Mozilla published the methodology, screenshots, and full journey maps for independent review.

The findings paint a picture of cumulative friction. No single prompt blocks installation of Chrome, Firefox, Brave, Vivaldi, or Opera, but together they create an environment where the operating system repeatedly attempts to restore, promote, or launch Edge. Among the documented tactics:

  • Bing injection: When users in the US, UK, or India searched for alternative browsers, Bing displayed an "All you need is right here" banner suggesting they already had what they need in Edge. That banner did not appear in tests from Germany.
  • Misleading button labels: Some dialogs presented options that appeared to merely dismiss a message but actually set Edge as the system default.
  • Taskbar persistence: Edge is pre-pinned to the Windows 11 taskbar, and a freshly installed rival browser may not replace that pin without manual intervention.
  • Windows Search override: In non-EEA regions, web results from the taskbar search box open in Edge even when another browser is set as default.
  • Copilot link handling: The AI assistant itself ignores the default browser; links it generates open in Edge regardless of user preference.
  • Data-sharing defaults: Copilot's data-sharing toggles were preset to "On" in the US and India, but to "Off" in the EEA and UK.

These aren't isolated bugs. The report frames them as a coordinated strategy to make Edge the path of least resistance, particularly for less technical users who may not recognize that a button meant to dismiss a message also changes a system preference.

What It Means for You

For home users, the practical impact is subtle but real. Downloading Firefox or Chrome still works, but the system will periodically invite Edge back into the conversation — through a search result, a taskbar icon, an in-app prompt, or an AI interaction. The default browser setting in Windows 11's Settings app is only one piece of a larger puzzle.

For power users, the annoyance is familiar. Unwanted Edge launches from widgets, search highlights, or link-based Copilot queries can be worked around with registry tweaks and third-party tools, but these countermeasures shouldn't be necessary. The report reinforces that the behavior is modifiable on Microsoft's end, given that it already differs by geography.

For IT administrators, the findings carry deployment implications. Configuring a default browser via Group Policy or MDM is not enough. The entire link-opening chain — from Windows Search to Microsoft 365 apps, Teams, and Copilot — must be tested and potentially restricted through separate policies. A browser choice set during image creation may be circumvented by a Copilot-generated link weeks later.

For developers and browser vendors, the report confirms long-held suspicions. The Browser Choice Alliance, which includes Vivaldi and others, immediately praised the study, with Vivaldi technical communications officer Bruce Lawson telling The Register that the findings match what rivals have been telling regulators for years. The documented regional differences provide ammunition for antitrust complaints outside the EU.

How We Got Here

Microsoft's browser promotion tactics have drawn regulatory fire before. In late 2021 and early 2022, early builds of Windows 11 made changing the default browser unusually cumbersome, with per-file-type assignments required for HTTP, HTTPS, HTML, and PDF. After public backlash and competitive pressure, Microsoft streamlined the default apps page later in 2022, but the edge cases persisted.

The first Over The Edge report in 2022 catalogued many of the same tactics, and Mozilla says some were subsequently tweaked — but often replaced by new ones. The rise of Copilot introduces a fresh vector: an AI assistant that users increasingly encounter across Windows, Edge, and the web, and that can bypass browser preferences entirely.

The Digital Markets Act in the European Union forced Microsoft to introduce a browser choice screen in the EEA and remove certain promotional elements. The new research finds that the company did more than what was strictly required: Search respects the default, the Bing banner vanished, and Copilot defaults became more privacy-friendly. Outside the EEA, those improvements are absent. This creates a split Windows experience based on geography — a testament to Microsoft's ability to change behavior but unwillingness to do so globally.

What to Do Now

If you're a Windows user who prefers a non-Edge browser, here are concrete steps to reclaim control:

  1. Set your default browser the right way. Go to Settings > Apps > Default apps, search for your browser, and click "Set default." This should cover most link types, but always scroll through the list to verify HTTP, HTTPS, .htm, and .html are all assigned.
  2. Unpin Edge from the taskbar and pin your chosen browser instead. Right-click the Edge icon and select "Unpin from taskbar."
  3. Tame Windows Search web results. In Settings > Privacy & security > Search permissions, turn off "Show search highlights" and consider toggling off cloud content search if you don't need it. A registry edit can force Search to use your default browser, but that's riskier.
  4. Check Copilot settings. In Copilot (if available), look for data-sharing or privacy toggles and ensure they match your comfort level. Note that Copilot-generated links may still open in Edge; using a third-party tool like EdgeDeflector or MSEdgeRedirect can intercept these links and route them to your default browser.
  5. For IT pros: Use Group Policy or Microsoft Intune to enforce browser defaults system-wide (e.g., via Associate a protocol with a specific browser policy) and test all Microsoft 365 and Copilot endpoints. The European configuration can serve as a baseline for what's possible; push Microsoft support for parity outside the EEA.
  6. Stay informed. The regulatory landscape is shifting. The Browser Choice Alliance and Mozilla are actively pressing authorities in the UK, Australia, Japan, and elsewhere. If you're in a jurisdiction without DMA-like rules, consider signaling to your local consumer protection agency that browser choice manipulation deserves scrutiny.

Outlook: Will Microsoft Extend Fair Play Globally?

The most compelling evidence in Over The Edge 2.0 isn't a new dark pattern — it's the geographic split. Microsoft has already built a version of Windows that respects user browser choices more faithfully, and it deploys that version inside the European Economic Area. The company has not explained why the same courtesy isn't extended to the rest of the world.

Regulators in the UK, Australia, and Japan are already facing calls to investigate. The Browser Choice Alliance and individual vendors are armed with fresh data showing that Microsoft's claimed technical limitations are, at best, selective. For now, Windows users outside Europe continue to experience a browser-choice journey that the researchers classify as coercive — but only because Microsoft chooses not to flick a switch it has already built.

Meanwhile, Edge's global desktop market share sits at just over 10 percent, far behind Chrome, according to Statcounter's June 2026 figures. Mozilla argues that the more relevant metric is share on Windows, where Edge gained ground over the study period. Whether that growth was caused by the documented nudges remains a hypothesis, not a proven link. Still, the report's methodical documentation leaves little doubt that Microsoft deploys every lever it controls to tilt the desktop toward Edge — unless a regulator forces it to do otherwise.