You can select the diferent data you want to remove after ending the private session, this are:
- Browsing History
- Donwloads History
- Disk Cache
- Form Information
- Saved Passwords
- Flash Cookies
You can set if must be show a statusbar icon, if you want the private browsing mode runs when start firefox, and if you want the application alert you about undeleted downloads in your disk after private mode to select it to delete.
This extension is based in Private Browsing Mode in firefox 3.1 and in Distrust extension with many modifications.