Examine source code of Show site IP

{
  "manifest_version": 2,
  "name": "__MSG_extension_name__",
  "description": "__MSG_extension_description__",
  "version": "1.7.1",
  "default_locale": "en",
  "homepage_url": "https://github.com/mad1ost/show-site-ip",
  "icons": {
    "32": "icons/ip.svg",
    "64": "icons/ip.svg",
    "128": "icons/ip.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "default_icon": "icons/ip.svg",
    "default_title": "__MSG_default_title__",
    "show_matches": [
      "http://*/*",
      "https://*/*"
    ]
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "webRequest",
    "webNavigation",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b36d16cb-76c3-4ba7-8adb-7214c9582a84}"
    }
  }
}