Rated 1 out of 5 stars

I have been using Session Manager (SM) for years now. I recently upgraded Firefox from v56 to v57. After several days of trying to get it to work right, I uninstalled it and reinstalled v56. It created a new profile which included my previous saved sessions. I also added back SM v0.8.1.13. However, I am not able to access the sessions as the icon on the toolbar is grayed-out. It also does not appear on the Tool menu. I am not using Private Mode, and I did not check the box to not display SM in the Tools menu. Ubuntu 14.04

[I know you asked to post problems on Mozilla forum but posts are blocked.]

This review is for a previous version of the add-on (0.8.1.13).