The solution is simple: ship with a basic open source browser, and during the intitial setup procedure, the wizard should ask users if they want to import data

The solution is simple: ship with a basic open source browser, and during the intitial setup procedure, the wizard should ask users if they want to import data from an existing browser they currently use, or use that same browser, and to select it. This lack of understanding onboarding and setup UX is the great differentiator from Windows and macOS for most consumers.