Examine source code of RefSeek Search Engine

{
  "manifest_version": 2,
  "name": "RefSeek Search",
  "version": "1.1",
  "description": "Search more than five billion documents, including web pages, books, encyclopedias, journals, and newspapers.",
  "icons": {
    "32": "icons/RefSeek_logo_asterisk.gif",
    "48": "icons/RefSeek_logo_asterisk.gif",
    "64": "icons/RefSeek_logo_asterisk.gif",
    "96": "icons/RefSeek_logo_asterisk.gif"
  },
  "permissions": [
    "contextMenus",
    "menus",
    "search"
  ],
  "browser_action": {
    "defualt_icon": "https://www.refseek.com/images/logo_asterisk.gif",
    "default_title": "RefSeek Search",
    "default_popup": "popup/popup_page.html"
  },
  "web_accessible_resources": [
    "icons/*.gif",
    "images/*gif"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "RefSeek",
      "search_url": "https://www.refseek.com/search?q={searchTerms}",
      "keyword": "refseek",
      "favIconUrl": "https://www.refseek.com/images/logo_asterisk.gif",
      "is_default": false
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{fa64ab10-2e4e-4215-b0ae-6bfb3d139b63}"
    }
  }
}