Examine source code of Simple TabSave

{
  "manifest_version": 3,
  "name": "TabSave Extension",
  "version": "1.0",
  "description": "Save and restore tabs of the current window, including containers and pins.",
  "permissions": [
    "tabs",
    "contextualIdentities",
    "cookies",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.svg",
      "32": "icon.svg",
      "48": "icon.svg",
      "128": "icon.svg"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{79f6a692-ef23-4782-af92-6d468c9c0501}",
      "strict_min_version": "109.0"
    }
  }
}