Examine source code of Draft Sync

{
  "manifest_version": 2,
  "name": "Draft Sync",
  "version": "1.0.0",
  "description": "Captures ESPN fantasy baseball draft picks and sends them to Hashtag Baseball for live draft tracking.",
  "permissions": [
    "storage",
    "activeTab",
    "cookies",
    "*://fantasy.espn.com/*",
    "*://hashtagbaseball.com/*",
    "*://www.hashtagbaseball.com/*",
    "https://hashtagbaseball.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://fantasy.espn.com/baseball/draft*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Draft Sync"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "draft-sync@hashtagbaseball.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}