You Can't Change the Default Browser or Switch To Google Search In Windows 10 S

Edge will remain the only browser that can be set to open .htm files, or web links from other apps, by default. Taking things a step further, users will also be prohibited from changing the default search engine from Bing. Alternatives such as Google or DuckDuckGo will be blocked in this regard. You can always visit the respective websites, though.
Read more: https://betanews.com/2017/05/02/microsoft-edge-bing-windows-10-s/?source=Snapzu