Plug-in for Firefox, Session Manager saves and restores the state of all windows.
Building upon SessionStore, this extension allows you to save the current state of Firefox (history, text data, cookies) and return to that state at any later moment. Besides the manually saved states, Session Manager automatically stores the current state in case of a crash.
Supports Firefox 2.0 and up, as well as any other browser that is based on Firefox 2.0 such as Flock and Netscape.