ニュース

このアドオンは、Firefoxのツールメニューにある「プライベートブラウジング」機能と入れ替わり、ブラウザの右下にショートカットアイコンも表示されます。 このPrivate Browsing Window、無料のアドオンなのですが、 Firefox3.6のみ対応 です。
During private browsing, your web history isn't saved, form data isn't recorded, and cookies are deleted immediately after you close the website window.
This private browsing feature was first introduced in Safari on Mac OS X version 10.4 Tiger in 2005, but Apple has further improved it and is promoting it as Private Browsing 2.0.