SafariRestore lets you automatically restore your previous browsing session
SafariRestore Restore with ease
Safari 5.02+ recommended
Automatically restore your previous browsing session, or manually manage sessions.
for best results, set Safari to open new windows with an Empty page.
***Note - Safari's Private browsing mode is IGNORED. I have filed a bug report with Apple, so hopefully the required API will be soon added....
Go Ahead and Download SafariRestore
http://sweetpproductions.com/extensions/extensions.htm