Examine source code of Neurobox - Media RPC

{
  "manifest_version": 2,
  "name": "Neurobox - Media RPC",
  "version": "0.0.1",
  "description": "Shows the current YouTube or SoundCloud playback in Rich Presence.",
  "permissions": [
    "identity",
    "storage",
    "*://*.youtube.com/*",
    "*://youtu.be/*",
    "*://soundcloud.com/*",
    "*://*.soundcloud.com/*",
    "https://discord.com/api/*",
    "https://discord.com/oauth2/*"
  ],
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "background": {
    "scripts": [
      "src/extension/config.js",
      "src/extension/background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://youtu.be/*"
      ],
      "js": [
        "src/extension/content-youtube.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "*://soundcloud.com/*",
        "*://*.soundcloud.com/*"
      ],
      "js": [
        "src/extension/content-soundcloud.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_title": "Neurobox RPC",
    "default_popup": "src/extension/popup.html",
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "neurobox@yaw.cx",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteActivity",
          "websiteContent"
        ]
      },
      "strict_min_version": "109.0"
    }
  }
}