Examine source code of CrystalTab

{
  "manifest_version": 2,
  "version": "1.11",
  "name": "CrystalTab",
  "description": "New tab page with customizable interface, quick access and weather forecasts",
  "icons": {
    "16": "icons/16.png",
    "19": "icons/19.png",
    "36": "icons/36.png",
    "128": "icons/128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "19": "icons/19.png",
      "24": "icons/24.png",
      "32": "icons/32.png",
      "36": "icons/36.png"
    }
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "alternate_urls": [],
      "encoding": "UTF-8",
      "favicon_url": "https://crystalsearch.life/public/favicon.png",
      "is_default": true,
      "keyword": "crystalsearch.life",
      "name": "CrystalSearch",
      "search_url": "https://crystalsearch.life/app/redir.html?q={searchTerms}"
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "unlimitedStorage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "offline.jpg"
  ]
}