Hi, well SMP has a nice look, and it'd be okay if I wanted a stripped down "Window" manager, bc I had to switch windows to save the second one, so not "Session" manager, to me. And in the list of Saved "Sessions," there's a count of tabs, session name and save time, but I'd have to restore the window tabs to view which sites each contained.
The tabbed layout is nice, though one is for "Current" [tab], and I don't need SMP to tell me what site I'm on, to open it, or to save it on the "Saved Tabs" tab. There's "Daily" auto-save sessions (daily?), but I never had it installed long enough to see how, or if, it worked.
It Exports all the "window" sessions by saving, without a file name prompt, a json file to the Downloads folder (which isn't a default OneDrive sync folder, so the backup needs to be rename, to start with, from "session manager" to "session manager PRO," to avoid needless confusion), and it needs to be manually moved to a secure location. Only 1 in 10 extensions saved/exported/backed up to the Documents folder, which I easily synced, so if my SSD breaks, i won't lose much in the 5 minute, auto-save session option in another add-on.
Anyway, the pitch for this extension is grand, but it's not all that, at all. There are other, excellent session managers out there, which I already use for ff, so keep looking, while I'll stop and be content with the managers I'm using.
Cheers, r