I am about to become pretty p*ssed about session manager.
I lost now 3 times within 1,5 month all my sessions.
1. Time it simply stopped saving the sessions. I learned about it too late.
2. After an update some days, maybe 2 weeks, ago an update od the session Manager scrubbed my session history, and restarted FF, so also the built-in feature of FF could not restore the session.
3. just today it happened again. My cat jumped onto the power button and guess what? No auto-save and the pro-active saves I made yesterday where gone too!

If it works, this addon can be a realy life.saver, but this year it rather was a show-stopper

Ok, the addon works but it's clunky, get rid of that!

I used to have SessionManager as my main tab/session manager addon for a long time and somehow it's nowhere to be found, I tried many tab session managing addons and none of them worked until now.

This one is working but the average user will not make proper use of because the core functionality and vital features are hidden away in the settings...

How's a regular user with little experience with tab addons is going figure this problem out? I don't know!

I'm using firefox for over 12 years and in my experience, saving tabs or carrying over sessions with sessions was never that difficult until today, they used much, much less RAM to work and loaded very fast on a very slow CPU (AMD Athlon 64 X2 dual core 2.4 GHz with only DDR2 support below 800mhz on a 2 GB RAM system) and never gave any problems at all, only when opening because it wanted to load every single tab at the same time, that got fixed but somehow it uses even more RAM than ever, how's that advanced development? that's regression!

But back on the review, I saved the session, gave it a name and that's it? no, you are OBLIGATED to go under settings, go to Sessions, click on "Export Sessions" and then you're presented with a prompt to give it a name and ACTUALLY locally save your sessions to a file that you MUST import on settings for it to display all your saved tabs before discarding everything and call it a day, "SessionManager" used to immediately ask for a file name without going through settings to carry your tabs to another session for whatever reason, this should not be this complicated to new users, otherwise the bad reviews are going to flood the only addon that does his job of locally saving your tabs/session before closing firefox.

Developers, do your job right now before it's too late, add the local saving option to build the default sessions database before the user switches away from the addon or close the browser, give them a reason to increase the 5 Star rating, seeing 50 1 Star reviews is not a good thing and most of them didn't even say what's wrong here, I'm beyond average user experience and this clunky addon needs more work to become good, I already saved and managed to import all my tabs to another profile and every item was correct so, please fix that problem, the core functionality cannot be hidden under settings, that MUST be the very first option a new user sees every time they click on the addon icon before going into settings.

Until this problem is solved, this review will stay at 2 Stars, like I said, it does the job, but it's clunky and the new users aren't going to pay attention to that programming oversight.

You don't need to apologize here, this is a serious flaw that needs to be addressed quick to save it's image and reputation.