Examine source code of Random Invidious Video

{
  "manifest_version": 2,
  "name": "Random Invidious Video Selector",
  "version": "1.0",
  "description": "Allows a random video to be loaded from the Subscriptions page.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background-script.js"
    ]
  },
  "page_action": {
    "show_matches": [
      "*://*.invidio.us/feed/*"
    ],
    "default_icon": "icon.png",
    "default_title": "Random Invidious Video"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.invidio.us/*"
      ],
      "js": [
        "random-movie.js"
      ]
    }
  ]
}