Add-ons that store or otherwise handle browsing data must support <a href="https://developer.mozilla.org/En/Supporting_private_browsing_mode">Private Browsing Mode</a>. During a Private Browsing session, no browsing data can be written to disk, and all of this data must be cleared when Firefox quits or the Private Browsing session ends.
存储或覆盖浏览数据处理接口的附加组件必须支持<a href="https://developer.mozilla.org/En/Supporting_private_browsing_mode">隐私浏览模式</a>。在隐私浏览期间，不能有浏览数据被写入磁盘，并且这些数据必须在 Firefox 退出或隐私浏览会话结束时被清除。