Examine source code of Youtube Overlay Toggle

{
  "manifest_version": 3,
  "name": "Youtube Overlay Toggle",
  "version": "1.2",
  "description": "Toggle the visiblity of YouTube video overlays, including media buttons, progress bar, title and more...",
  "icons": {
    "16": "src/img/logo-128.png",
    "48": "src/img/logo-128.png",
    "128": "src/img/logo-128.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "src/js/background.js"
    ],
    "service_worker": "src/js/background.js"
  },
  "action": {
    "default_popup": "src/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "eldezenfektani@outlook.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "src/js/content.js"
      ]
    }
  ]
}