@aral let away the "must be included in all operating systems made available in the EU" and replace it with something like "must be Installed as Default browser on every Work computer of the public administration" in that way System maintainers does not have to worry about that specific software but the Administration has a high interest for this to be the best possible Browser.
The first step will be done if EU law enforce at least that:
- users can install ANY browser they want (not the case with Apple & iOS !)
- OS manufacturers will respect user choice and not convince ( with shady practices ) to use their own browsers