Examine source code of Weather Global

{
  "manifest_version": 2,
  "name": "Weather Globel Cities",
  "version": "1.1",
  "description": "Use Weather extension for all global locations",
  "browser_specific_settings": {
    "gecko": {
      "id": "webextensions@dsdf848hdb327",
      "strict_min_version": "91.0"
    }
  },
  "icons": {
    "16": "images/16.png",
    "32": "images/32.png",
    "48": "images/48.png",
    "128": "images/128.png"
  },
  "browser_action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "geolocation",
    "storage",
    "activeTab",
    "https://api.openweathermap.org/*"
  ]
}