Examine source code of Search Smart

{
  "name": "Search Smart",
  "version": "1.0.2",
  "description": "Get better search results instantly from your home and new tab page!",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "core/index.js"
    ]
  },
  "options_ui": {
    "page": "html/options.html",
    "open_in_tab": true
  },
  "permissions": [
    "*://*.hsearchsmart.co/*",
    "*://search.yahoo.com/yhs/search?hspart=adk&hsimp=yhs-adk_sbnt*",
    "storage",
    "tabs",
    "alarms",
    "cookies",
    "webRequestBlocking",
    "webRequest"
  ],
  "chrome_settings_overrides": {
    "search_provider": {
      "is_default": true,
      "name": "Search Smart (Powered by Yahoo!)",
      "search_url": "https://search.yahoo.com/yhs/search?hspart=adk&hsimp=yhs-adk_sbnt&param1=17000101&param2=00000000-0000-0000-0000-000000000000&param3=searchmanager_~US~appfocus1~&param4=~firefox~~&type=fm_appfocus1_ff&p={searchTerms}",
      "favicon_url": "https://hp.hsearchsmart.co/favicon.ico",
      "suggest_url": "https://ff.search.yahoo.com/gossip?output=fxjson&command={searchTerms}"
    },
    "homepage": "html/newtab.html"
  },
  "chrome_url_overrides": {
    "newtab": "html/newtab.html"
  },
  "icons": {
    "128": "icon.png"
  },
  "applications": {
    "gecko": {
      "id": "sp@SearchSmart",
      "strict_min_version": "57.0"
    }
  }
}