NOTE: I CANNOT OFFER SUPPORT THROUGH THE REVIEW PAGES, PLEASE USE THE SUPPORT LINKS TO THE RIGHT. 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. If you are having problems, please open the Browser Console (Firefox/Tools -> Web Development -> Browser Console) and disable and re-enable Session Manager and look for errors in the error console. Feedback can be sent to support email address listed to the top right or at. See for the complete users and options guide.
It can import sessions from both SessionSaver and Tab Mix Plus. Session Manager is compatible with Tab Mix Plus. This extension replaces SessionSaver and Tab Mix Plus' session manager. The add-on is restartless and can be enabled and disabled on the fly. It can also automatically save the state of open windows individually. 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. My only recommendation is to either not update to Firefox 57, use the Firefox ESR build or use a forked version of Firefox that does not remove support for add-ons such as CyberFox or Waterfox. Unfortunately do to limitations in the the provided APIs in Firefox 57, Session Manager cannot be implemented as a WebExtension add-on and will not work in Firefox 57 or higher.
