CookieSafe 3.1 Alpha 5 / 3.0.5

CookieSafe will allow you to easily control cookie permissions. It will appear on your statusbar. Just click on the icon to allow, block, or temporarily allow the site to set cookies. You can also view or clear the cookies and exceptions by right clicking on the statusbar icon. For a safer browsing you can block the cookies globally and enable them for each website separately.
Ссылка: http://releases..b/mozilla.org/addons/311084/cookiesafe_ff_4_compatible-3.1a5-sm+tb+fx.xpi