Session Manager

By: Michael Kraft

About this add-on

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup, after crashes or periodically. It can also automatically save the state of open windows individually. The add-on is restartless and can be enabled and disabled on the fly.

This extension replaces SessionSaver and Tab Mix Plus' session manager. Session Manager is compatible with Tab Mix Plus. It can import sessions from both SessionSaver and Tab Mix Plus.

See for the complete users and options guide.

Feedback can be sent to support email address listed to the top right or at The later is preferred.

If you are having problems, please open the Browser Console (Pale Moon/Tools -> Web Development -> Browser Console) and disable and re-enable Session Manager and look for errors in the error console. If there aren't any enable logging in the options menu and disabling and re-enable Session Manager again and send the logs to the email address listed on the right.

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Release Information

Updated on August 13, 2020


Pale Moon 27.0 to 28.*


Mozilla Public License 1.1


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