Examine source code of Safe Navigator

{
  "manifest_version": 2,
  "name": "Safe Navigator",
  "version": "1.0.0.0",
  "description": "Add the extension and click the toolbar icon to switch between Default and Safe Mode. Default search powered by Yahoo.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "contextMenus",
    "*://search.yahoo.com/search/?*"
  ],
  "background": {
    "scripts": [
      "constants.js",
      "bgWorkers/storageWorker.js",
      "bgWorkers/bgWorker.js"
    ]
  },
  "browser_action": {
    "default_popup": "safePopup/popup.html",
    "default_icon": {
      "128": "assets/icon128.png"
    }
  },
  "icons": {
    "48": "assets/icon48.png"
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Safe Navigator",
      "keyword": "Safe Navigator",
      "favicon_url": "https://safenavigator.net/favicon.png",
      "search_url": "https://search.yahoo.com/search/?q={searchTerms}",
      "suggest_url": "https://search.yahoo.com/sugg/ie?output=fxjson&command={searchTerms}&nResults=10",
      "encoding": "UTF-8",
      "is_default": true
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5969176c-4c97-4227-b624-428aa379aa71}"
    }
  }
}