[roel_v]

I used to do this too, and as of ~ 2 weeks ago, about half of all my stored tabs are replaced with 'New tab' after restarting the browser. No amount of screwing around in the profile and session_store or whatever it's called, or with plugins, will fix it. So now I'm weaning myself off 'tabs as bookmarks', and going back (after, what, 10 years?) to using bookmarks the way they were meant.

[the8472]

the session manager addon would have helped in that situation. it creates regular snapshots of your session which can be used to restore things if something like that happens (which is rare in my experience)

[roel_v]

Well from the comments on the addon page, it seems it has the same problems with multi process as the built-in session manager, and tab mix plus' session manager, have (blank windows after restoring). But I haven't tried this particular addon, it might work.