Examine source code of YouTube Usage Self Limiter

{
  "manifest_version": 3,
  "name": "YouTube Time-Limiter",
  "version": "0.1.0",
  "description": "Honest self-binding for YouTube: watch only inside daily windows with a continuous timer, restricted browsing outside them, and a daily visit cap.",
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-limiter@selfbinding.local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "lib/shared.js",
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "YouTube Time-Limiter",
    "default_icon": {
      "48": "icons/icon.svg",
      "96": "icons/icon.svg"
    }
  },
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "lib/shared.js",
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "permissions": [
    "storage",
    "alarms",
    "tabs",
    "webNavigation"
  ],
  "host_permissions": [
    "*://*.youtube.com/*"
  ]
}