Mozilla CEO Chris Beard said that user choice has now been all but removed in Windows 10.

He wrote:

"The upgrade now be purposefully designed to throw away the choices its customers have made about the Internet experience they want...On the user choice benchmark, Microsoft's Windows 10 falls woefully short, even when compared to its own past versions. While it is technically possible for people to preserve their previous settings and defaults, the design of the new Windows 10 upgrade experience and user interface does not make this obvious nor easy."

Mozilla has complained about all the issues they have with the new version of Windows. These include the fact the default API settings are now less intuitive and make it harder for users to use third-party apps, with changing your defaults needing twice as many clicks compared to previous versions of Windows.

The letter ends:

"We strongly urge you to reconsider your business tactic here and again respect people's right to choice and control of their online experience by making it easier, more obvious and intuitive for people to preserve the choices they have already made through the upgrade experience. It should be easier for people to assert new choices and preferences, not just for other Microsoft products, through the default settings APIs and user interfaces."

Well that told him. We don't think it will have as much effect as those who moaned about being charged to play Solitaire.  But Microsoft has been fined for doing this sort of antitrust stuff before.