Examine source code of IP Addon

{
  "manifest_version": 2,
  "name": "IP Addon",
  "version": "1.9",
  "description": "Addon para login e exibição de proxies.",
  "permissions": [
    "storage",
    "activeTab",
    "proxy",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon-48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "48": "icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ipdedica-addon@jpcf.pt",
      "strict_min_version": "91.1.0"
    }
  }
}