Examine source code of Purge History

{
  "manifest_version": 2,
  "name": "Auto History Cleaner",
  "version": "1.0",
  "description": "自动删除特定域名的浏览历史记录。",
  "icons": {
    "48": "icon-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@auto-history-cleaner",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "description": "This add-on does not collect or transmit any personal data, however it will need access to your browsing history to function properly."
      }
    }
  },
  "permissions": [
    "history",
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icon-48.png",
    "default_popup": "popup/popup.html",
    "default_title": "域名管理"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}