Hi KitchM, I don't use the Session Manager extension, but I believe it saves the files that Firefox creates, so the same parameters would apply.

But where are those parameters set?

Hi KitchM, you wrote:

But where are those parameters set?

I was referring to the settings you can modify in about:config that I mentioned on the earlier page of this thread.

Oh, now that I check, I didn't give the specific steps, sorry about that:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste sess and pause while the list is filtered

(3) Double-click the following preferences to modify their value:

• browser.sessionstore.max_serialize_back - maximum number of pages from "back" history that can be restored (default 10)
• browser.sessionstore.max_tabs_undo - maximum number of closed tabs stored/restorable for each window (default 10)
• browser.sessionstore.max_windows_undo - maximum number of closed windows stored/restorable per session (default 3)

If you end up with some irrational value, right-click > Reset will restore the default.

Perhaps somewhat off topic; but do you know if the Session Manager overrides any of those settings?

KitchM said

Perhaps somewhat off topic; but do you know if the Session Manager overrides any of those settings?

I've never tried it myself, so I only know what I've heard... which wasn't to that level of detail.

Thanks.

I was pointed to Unload Tabs add-on and I am trying it out. I'll post if I find any good details.

I think I'll keep this open. Maybe someone else will have some ideas to help with the issue.

Thanks all.