Examine source code of ProxyHat - Proxy Manager

{
  "manifest_version" : 2 ,
  "name" : "ProxyHat - Proxy Manager",
  "version" : "1.0.0",
  "description" : "Smart proxy routing for every site. Manage proxy profiles, set per-domain rules, and connect your ProxyHat account for residential proxies.",
  "permissions" : [
    "proxy" ,
    "storage" ,
    "tabs" ,
    "identity" ,
    "webRequest" ,
    "webRequestBlocking" ,
    "<all_urls>" ,
    "https://*.proxyhat.com/*" 
  ],
  "incognito" : "spanning" ,
  "background" : {
    "scripts" : [
      "traffic-utils.js" ,
      "config.js" ,
      "oauth.js" ,
      "proxyhat-api.js" ,
      "proxyEngine.js" ,
      "authHandler.js" ,
      "background-universal.js" 
    ]
  },
  "browser_action" : {
    "default_popup" : "popup/popup.html",
    "default_title" : "ProxyHat",
    "default_icon" : {
      "16" : "favicon.svg",
      "32" : "favicon.svg",
      "48" : "favicon.svg"
    }
  },
  "options_ui" : {
    "page": "options/options.html" ,
    "open_in_tab": true
  },
  "icons" : {
    "16" : "favicon.svg",
    "48" : "favicon.svg",
    "128" : "favicon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@proxyhat.com",
      "strict_min_version": "91.1.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}