Examine source code of Search google scholar

{
  "manifest_version": 2,
  "name": "Search google scholar",
  "version": "0.1",
  "description": "A menu option to search selected text on google scholar, by yun.",
  "icons": {
    "16": "icons/scholar.png"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "search.js"
    ]
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "scholar",
      "search_url": "https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q={searchTerms}",
      "keyword": "sch"
    }
  }
}