Use case

I would like to be able to disable COEP/COOP headers while debugging WASM builds. In particular, this issue is blocking our project's adoption of WASM:

firebase/flutterfire#12819

Turning off headers will fix the functionality, but we have no way of turning them in debug mode, e.g., running:

$ flutter run -d chrome --wasm

Proposal

We would like to be able to optionally disable headers in debug mode from the command line, e.g.:

$ flutter run -d chrome --wasm --disable-headers