Examine source code of Startup Tab Manager

{
  "manifest_version": 3,
  "name": "Startup Tab Manager",
  "version": "1.0.2",
  "description": "Opens, pins, reorders and handles selected tabs on startup",
  "permissions": [
    "tabs",
    "storage"
  ],
  "incognito": "spanning",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png",
      "128": "icons/icon-128.png"
    },
    "default_title": "Startup Tab Manager"
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "startup-tab-manager@pierspad",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}