The most feature rich session manager for Firefox Quantum that comes closer than any other for replicating the old, brilliant-but-defunct Session Manager extension.

Missing but sorely desired is some way to synchronize sessions between Firefox instances. Other session managers do this by storing sessions in bookmarks. Session Boss does not use bookmarks.

Also highly desired is a method to export sessions in a way that can be easily imported - either as a bookmark file to use outside of the addon, or a file that can be easily imported into another instance of Session Boss.

Feature requests: 1) Pin sessions to the top of the list. 2) More than 99 sessions slots please.

Overall, a very good stab at providing a much-desired feature but a couple of things I would like are missing.