Examine source code of Reload Timer

{
  "manifest_version": 3,
  "name": "Reload Timer",
  "version": "1.0.0",
  "description": "Reload one selected Firefox tab on a user-set interval for a limited number of times.",
  "icons": {
    "64": "assets/icon.svg"
  },
  "action": {
    "default_title": "Reload Timer",
    "default_popup": "popup/popup.html",
    "default_icon": "assets/icon.svg"
  },
  "background": {
    "scripts": [
      "shared/timerModel.js",
      "background.js"
    ]
  },
  "permissions": [
    "alarms",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "reloadtimer@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}