Mozilla report accuses Microsoft of "harmful design" in Windows 11 to push users toward Edge

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A report commissioned by Mozilla accuses Microsoft of using 'harmful design' to undermine browser choice in Windows 11

That allegedly includes trick wording, nagging, preselection, and generally dubious tactics to push Edge over other browsers

The report does observe the situation is better in the European Economic Area, due to regulations there, and notes that "regulatory action works", urging authorities elsewhere to take a similar stand

Mozilla, the maker of Firefox , has published another report that claims Microsoft isn't maintaining a suitably level playing field for web browsers on Windows, and is unfairly pushing users towards Edge.

As Mozilla makes clear, it published the first 'Over the Edge' report – about 'How Microsoft's design tactics compromise free browser choice' – two years back, and the follow-up has just arrived (as spotted by Eteknix ).

It's not actually written by Mozilla, I should note, but two independent researchers commissioned by the Firefox maker (Harry Brignull and Cennydd Bowles, the same pair who wrote the first article). It takes in user opinions from the US, UK, India and Germany regarding "key browser-choice journeys" on Windows 11 and 10.

In a nutshell, they conclude that: "Microsoft continues to deploy harmful design to undermine people's browser choice."

That specifically involves, according to the report: "Trick wording, obstruction, visual interference, preselection, nagging, and forced action — at almost every step of the user journey."

Some of the worst excesses highlighted are the pop-up banner that Edge users see when they go to the Chrome download page (trying to get them to stick with the Microsoft browser, which, it says, has the same tech as Chrome but with the "added trust of Microsoft"), and nagging within Windows around using Edge as the default browser in one way or another.

The report also notes how Edge is pre-pinned to the Windows taskbar, and how a migration from Windows 10 to Windows 11 resets Edge as the default browser, overriding any previous choice. There are a lot of accusations around trick wording, too, as well as an observation that Microsoft is using Copilot (AI) to open links in Edge rather than your default browser.

On the topic of AI, the report notes: "The researchers suggest that a sequence of seemingly minor consent requests across Windows and Edge may combine into a 'pipeline' funneling browsing data — potentially including data originating in rival browsers — into Microsoft's advertising and personalization systems."

It's notable that Germany — included as a representative country within the European Economic Area (EEA), which has different regulatory requirements Microsoft must adhere to — escapes quite a few of these excesses (the Chrome download nonsense included).

Despite that, the researchers argue that their broad conclusion that "Microsoft does not allow people to download and install an alternative browser, to set it as their default, or to continue using it as their default, without harmful interference" is, they claim, true "across every region tested".

Analysis: a call to regulate

(Image credit: Mozilla) Yes, this is a report commissioned by a browser rival, but these findings aren't at all surprising in the main, and it's long been known that Microsoft overzealously promotes Edge in Windows 11 , trying various dubious shenanigans to get the browser in play as the report observes. Of course, on the flipside Google pulls similar stunts with Chrome.

Still, that's not an excuse, and no browser should be actively attempting to dissuade people from downloading another rival browser. What Mozilla is also pointing out, of course, is that Microsoft is in a particular position of power here, given that it owns the world's primary desktop OS, and it's leveraging that platform in various ways to push adoption of Edge.

Whether that's worked for Microsoft, or not — spoiler alert, it hasn't — is irrelevant, as this behavior obviously isn't ethical or fair, and while it may not have dented Chrome's reign as the top browser, it may have damaged smaller rivals like Firefox.

While the EEA may have a considerably better balance of browser equality within Windows, the report notes that this is, of course, because regulations have forced Microsoft's hand. Arguably, this is another negative in that it shows Microsoft only respects user choice in terms of browsers when it's forced to do so.

Mozilla finishes with the following paragraph that sums everything up nicely: "We again urge Microsoft to abandon these harmful patterns worldwide. And we urge regulators in the European Union, the United Kingdom, the United States, India, and beyond to consider this report as evidence that regulatory action works — there is much still to do."

So, if Microsoft really wants to talk about "added trust", how about some action on some of these sticking points? Or is this just a case of having to be more trustworthy than Google?