The short of it: I don't want my closed windows to be automatically forgotten, at least not in only 25 days. Could that be an option in sessionsaver?
Background:
Some bright developers at mozilla decided that it would be a good idea to purge the closed windows list when some time has passed since the window was closed. Fair enough, but some people might want do determine for them self what that time limit would be, right? So they made an about:config entry for that, "browser.sessionstore.cleanup.forget_closed_after". What that means is "how many milliseconds should a closed window be remembered?" And this is where I stop agreeing with their choices, milliseconds is not a reasonable choice for this variable, firstly because no one is likely to want that granularity (seconds, hours or even days would be more reasonable) and secondly because the internal implementation of these entries maxes out the size of integers at 2147483647, corresponding to a tad shy of 25 days worth of milliseconds. So we can't set the time-to-live longer than that, if we try we get a not-a-number error message. As far as I know there is no way of disabling this pruning altogether. Since we use the session saver add-on, we have the option of setting the maximum number of closed windows to remember, so there is no need for the pruning. Could we get an option to disable it please? Or, if I'm missing something, please set me straight