Examine source code of Automatic Tab Opener

{
  "manifest_version": 3,
  "developer": {
    "name": "Nuno Reis",
    "url": "https://www.instanceof.dev"
  },
  "name": "Automatic Tab Opener",
  "description": "Enables the user to set specific times to open a tab for a specific URL with options of closing automatically the tab when complete",
  "version": "0.1.4",
  "minimum_chrome_version": "92",
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "assets/js/background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "nuno.reis@instanceof.dev"
    }
  },
  "permissions": [
    "storage",
    "alarms",
    "tabs"
  ],
  "icons": {
    "16": "assets/icons/icon.png",
    "48": "assets/icons/icon.png",
    "128": "assets/icons/icon.png"
  }
}