Examine source code of Easy Switch Search

{
  "manifest_version": 2,
  "name": "Easy Switch Search",
  "version": "1.5",
  "description": "Easily Switch your default search engine with a click!",
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "*://easyswitchsearch.com/*"
  ],
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "browser_action": {
    "default_popup": "easypopup.html",
    "default_icon": {
      "32": "images/icon_32.png",
      "64": "images/icon_64.png",
      "128": "images/icon_128.png"
    }
  },
  "icons": {
    "32": "images/icon_32.png",
    "64": "images/icon_64.png",
    "128": "images/icon_128.png"
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "Easy Switch Search Engine",
      "search_url": "https://easyswitchsearch.com/ext/search?src=default&q={searchTerms}",
      "is_default": true,
      "keyword": "search",
      "favicon_url": "https://easyswitchsearch.com/favicon.ico",
      "encoding": "UTF-8"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8051eff8-1063-4b53-bd8b-8f42dd18d40f}",
      "strict_min_version": "91.0"
    }
  }
}