Examine source code of YT-NonStop

{
  "name": "YT-NonStop",
  "author": "Ignotum77",
  "version": "1.8.3",
  "description": "It gets you rid of Youtube's \"feature\" - Video paused. Continue watching? It also comes with an autoplay on/off feature that disables YT's autoplay or skips the endscreen countdown to the next video.",
  "browser_specific_settings": {
    "gecko": {
      "id": "@YT-NonStop",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "https://www.youtube.com/*",
    "https://music.youtube.com/*",
    "https://m.youtube.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://music.youtube.com/*",
        "https://m.youtube.com/*"
      ],
      "js": [
        "script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "page_action": {
    "default_icon": "images/ytn128.png",
    "default_popup": "popup.html",
    "show_matches": [
      "https://www.youtube.com/*",
      "https://music.youtube.com/*",
      "https://m.youtube.com/*"
    ]
  },
  "icons": {
    "48": "images/ytn48.png",
    "128": "images/ytn128.png"
  },
  "manifest_version": 2
}