Examine source code of Tab History Tracker

{
  "manifest_version": 3,
  "name": "Tab History Tracker",
  "version": "2.3.0",
  "description": "Per-tab browsing history that survives restarts. Search it, jump back, and reopen closed tabs with their history intact.",
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-history-tracker@lpelov",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "tabHistoryConfig.js",
      "historyStore.js",
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+H",
        "mac": "Alt+H"
      },
      "description": "Open Tab History popup"
    }
  },
  "icons": {
    "16": "images/favicon-16x16.png",
    "48": "images/favicon-48.png",
    "128": "images/favicon-128.png"
  }
}