Examine source code of Netflix Party

{
  "manifest_version": 3,
  "name": "__MSG_name__",
  "version": "1.0.1",
  "default_locale": "en",
  "description": "__MSG_description__",
  "icons": {
    "16": "./img/16.png",
    "32": "./img/32.png",
    "48": "./img/48.png",
    "128": "./img/128.png"
  },
  "action": {
    "default_icon": "./img/128.png",
    "default_title": "__MSG_name__",
    "default_popup": "popup/index.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.netflix.com/*",
        "http://www.netflix.com/*"
      ],
      "js": [
        "content/index.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "content/contentScript.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://netflixpartys.com/*"
      ],
      "js": [
        "netflixParty.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "tabs",
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content/index.js",
        "content/videoController.js",
        "content/contentScript.js"
      ],
      "matches": [
        "https://*/*",
        "http://*/*"
      ]
    },
    {
      "resources": [
        "netflixParty.js"
      ],
      "matches": [
        "https://netflixpartys.com/*"
      ]
    },
    {
      "resources": [
        "chat/index.html"
      ],
      "matches": [
        "https://*.netflix.com/*",
        "http://*.netflix.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{62c7a124-b108-4c75-aa44-60a7bac6cf9e}",
      "strict_min_version": "42.0"
    }
  }
}