Examine source code of Tab Set History

{
  "manifest_version": 3,
  "name": "Tab Set History",
  "version": "1.2.2",
  "description": "Keeps snapshots of your open tabs so you can restore them after accidental closes.",
  "permissions": [
    "tabs",
    "alarms"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-set-history@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}