Examine source code of Better VVeather

{
  "manifest_version": 2,
  "name": "Better VVeather",
  "description": "Multi-location weather with a glanceable toolbar icon.",
  "version": "0.0.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4402e563-bfc0-4d5e-b4db-51c65836e661}",
      "data_collection_permissions": {
        "required": [
          "locationInfo"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "alarms",
    "https://api.open-meteo.com/*",
    "https://geocoding-api.open-meteo.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Better VVeather",
    "default_popup": "popup.html"
  }
}