Restarting my tabs disappear, only after Windows reboot.
I have about 15 more or less permanent tabs of emails that contain information to which I frequently refer. However, they often disappear, sometimes after I close and restart T'bird, often after I install an update, and almost always after I close the program and restart my computer, but not so often when I just close T'bird and shut down. It doesn't happen when the computer "sleeps" (or "hybernates") and I wake it later or the next day.
Moambuepyre Wayne Mery rupive
Opaite Mbohovái (3)
how often to you allow ccleaner to delete the session file that contains the open tabs.
So far as I know, never, but I've not even thought about that. It is the case, however, that: (1) after I run CCleaner the tabs are still there, (2) that tabs remain after I close and reopen Thunderbird, and (3) they disappear only after (but not always) I reboot (before which, I always close Thunderbird).
See http://thunderbirdtweaks.blogspot.com.au/2012/06/thunderbird-and-ccleaner-or-my-settings.html
It is a very long standing issue with ccleaner.