Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

No response

Describe the solution you'd like

The official file extension for the Web Application Manifest is webmanifest. This helps servers to deliver the file with the official media type (application/manifest+json). I propose changing the manifest's file extension in the Blazor WebAssembly project templates from "json" to "webmanifest".

Sources:

• Web Application Manifest spec
• IANA media type registration

Additional context

No response