gecko-dev/dom/media/fake-cdm/manifest.json

{
    "name": "fake",
    "description": "Fake CDM Plugin",
    "version": "1",
    "x-cdm-module-versions": "4",
    "x-cdm-interface-versions": "10",
    "x-cdm-host-versions": "10",
    "x-cdm-codecs": ""
}