Examine source code of Study Music Pauser

{
  "manifest_version": 2,
  "name": "Study Music Pauser",
  "version": "1.0",
  "description": "Auto-pauses your YouTube music when a lecture video plays, resumes when it stops.",
  "permissions": [
    "tabs",
    "storage",
    "webNavigation",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "study-music-pauser@extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png",
    "default_title": "Study Music Pauser"
  }
}