Apple's Dynamic Desktop feature relies on your location to be able to match the lighting of the wallpaper with the lighting outside, so to use it, you will need to have Location Services enabled.

Friend has a new desktop and has a specific preference for having multiple windows of the same browser open. On Windows 10 I found that's accomplished via: Settings/Taskbar/Combine Buttons on ...

Here, you can assign the app to any desktop you want. If you’re not seeing any additional desktops, you might need to open up Mission Control and create a new desktop first.