Rated 5 out of 5 stars

le Firefox user 4c76a8 ar Samh. 15, 2017 · buan-nasc

Ditto on all the requests for a version that will work with the new Firefox.

I will GLADLY donate.

I went here, downloaded the previous version of Firefox, got my session manager back!!

https://support.mozilla.org/en-US/kb/install-older-version-of-firefox

Will wait and hope for a new version of Session Manager.