Of course, in the end users are losing the most, and Microsoft is definitely abusing their position. But we can no longer pretend that Firefox has any chance to survive with the current management, and we should definitely call them out on cultivating the same anti-user stance that they have been fighting against.
It's relevant to point out that while Mozilla is (rightfully) fighting against user-hostile practices, at the same time they treat their users in a similar way.
Browsers have become platforms, just like an operating system, and Firefox is the only browser that took away the freedom to install extensions in your browser, on your own terms. They disrespect their users on their own platform just as much as Microsoft does when it comes to setting a default browser on Windows.