Examine source code of Surf Clear

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    },
    "default_title": "__MSG_browser_action_title__"
  },
  "default_locale": "en",
  "description": "__MSG_extension_description__",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "manifest_version": 2,
  "name": "__MSG_extension_name__",
  "permissions": [
    "tabs"
  ],
  "version": "0.0.3",
  "chrome_settings_overrides": {
    "search_provider": {
      "encoding": "UTF-8",
      "name": "__MSG_search_provider_name__",
      "keyword": "surf",
      "is_default": true,
      "search_url": "https://www.surfclear.org/search.php?q={searchTerms}",
      "suggest_url": "https://www.bing.com/osjson.aspx?query={searchTerms}",
      "favicon_url": "https://www.surfclear.org/images/icon32.png",
      "image_url": "https://www.surfclear.org/search_image.php?q={searchTerms}",
      "alternate_urls": [
        "https://www.surfclear.org/search_news.php?q={searchTerms}",
        "https://www.surfclear.org/search_video.php?q={searchTerms}"
      ]
    }
  }
}