Microsoft also violates the licenses of the open-source projects on GitHub.
As someone publishing open-source software, I do not put the license for fun in there. If I know for a fact that it's being violated, I will not publish my code. For the same reasons, I also don't contribute to projects on GitHub.
And last but not least, Microsoft also has a history of violatingprivacylaws.
Particularly, if your project advertises itself as privacy-centric, like this browser does, then this excludes your users from reporting bugs, discussing the direction of the project or contributing.