Examine source code of MIDI Player

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "author": "Jazz-Soft",
  "version": "1.0.2.0",
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "inject.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dd2a8325-13f3-40ad-93be-457e84e39883}"
    }
  },
  "default_locale": "en",
  "homepage_url": "https://jazz-soft.net"
}