See above in colors.. Hope that answers questions..
I think you are on to something.
I had went and modified in about config a long time ago to have save and quit again
I believe this was the setting...I just went and looked
browser.showQuitWarning =true
It worked well for a long time..but since then versions have come and gone.
I want to keep the save and quit itself...I just have something conflicting with it.
This would explain why after the crash...I have duplicates of the same to restore...and the stuff from 3 days ago.
I do know it backs up session according to schedule {FF}..so it sounds like it is just keeps adding to that session rather than just back up what is currently running
This may be causeing some kind of conflict shown below
In about config it shows
extensions.tabmix.sessions.crashRecovery = false
extensions.tabmix.sessions.crashed= true
But my tabs mixed plus options dont jive with above
as I am showing use fire fox built in session restore feature as checked..../as hadnt been working is why I did the edit in about config many moons ago
Enable crash recovery checked
Note how crash recovery is checked is my mixed tab plus options
But shows false in my about:config.
Now even If I have add ons disable...my ram usage will still climb and climb with usage..and releases a small amount back to me after closing windows and tabs....after I reach about a gig on my 2 gig machine...I am in the crashing zone and need to beware....many times the crash will happen when I am closing no longer needed windows or tabs...as a result I sometimes leave them open...and may end up with 20 or 30 going lol.