Following Google Chrome’s release, Mozilla has felt the pressure of the competition and put private mode back in Firefox 3.1’s feature list in second level priority, and on track for Beta 1, the next development release (around mid-October).
In private mode, all user activity involving data such as searches, visited web pages, downloads, cached pages, credentials passed to restricted sites, etc. is discarded once the user returns to normal mode. Despite being infamously well known as “porn mode” there are many other valid use cases. As stated in Mozilla Wiki[…]