Examine source code of YT Bookmarker

{
  "manifest_version": 3,
  "name": "YT Bookmarker",
  "version": "2.1.3",
  "description": "Save timestamps in YouTube videos for easy access and playback.",
  "author": "Ayush Rana",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_popup": "popup.html",
    "default_title": "YT Bookmarker"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "js": [
        "content_script.js"
      ],
      "matches": [
        "<all_urls>",
        "https://*.youtube.com/*"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "host_permissions": [
    "https://*.youtube.com/*",
    "<all_urls>"
  ],
  "permissions": [
    "storage",
    "tabs",
    "webNavigation",
    "declarativeNetRequestWithHostAccess"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "resources": [
        "assets/bookmark.png",
        "assets/bookmarkdark.png",
        "assets/play.png",
        "assets/delete.png",
        "assets/save.png"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ytbookmarker@example.com",
      "strict_min_version": "91.0"
    }
  }
}