Examine source code of Forecaster

{
  "manifest_version": 2,
  "name": "Weather.gov Unofficial",
  "version": "1.0.0",
  "description": "Lightweight weather extension using Weather.gov API. See current temperature at a glance and view extended and hourly forecasts.",
  "permissions": [
    "storage",
    "alarms",
    "webRequest",
    "webRequestBlocking",
    "https://api.weather.gov/*"
  ],
  "icons": {
    "48": "icons/weather-48.svg",
    "96": "icons/weather-96.svg"
  },
  "browser_action": {
    "default_icon": "icons/weather-48.svg",
    "default_popup": "popup/popup.html",
    "default_title": "Weather.gov Unofficial"
  },
  "background": {
    "scripts": [
      "shared/classify.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "weather-gov-unofficial@local",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}