Examine source code of Switch Default Search

{
  "name": "Switch Default Search",
  "version": "3.0",
  "description": "The addon switches your default search",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "index.js"
    ]
  },
  "permissions": [
    "*://*.hquick-forms.com/*",
    "storage",
    "tabs"
  ],
  "chrome_settings_overrides": {
    "search_provider": {
      "is_default": true,
      "name": "Set Bing Search",
      "search_url": "https://search.yahoo.com/yhs/search?p={searchTerms}",
      "favicon_url": "https://www.yahoo.com/favicon.ico",
      "suggest_url": "https://www.yahoo.com/osjson.aspx?query={searchTerms}"
    }
  },
  "icons": {
    "128": "icon.png"
  },
  "applications": {
    "gecko": {
      "id": "addon@testdefaultsearch.com",
      "strict_min_version": "57.0"
    }
  }
}