The Konqueror web browser, which is available for Linux and Microsoft Windows systems, provides a mechanism to save and restore sessions. If Konqueror becomes unresponsive and you have to kill it, you should be given a choice to restore the previous session when you reopen the browser.
You can manually save a session, by clicking on File on the menu bar, then selecting Sessions, then Save As.... You will then be prompted to provide a name for the session. You can reopen a saved session by selecting File then Sessions from the menu bar and then selecting from one of the saved sessions you will see listed. If you have previously saved one or more sessions, you will see them listed under the Save As... and Manage... options.
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