"How to increase the number of "Recently Closed windows"?
Is the change valid immediatly in the ongoing session?
Is the change valid immediatly in the ongoing session?
Todas as respostas (2)
The preference in about:config is browser.sessionstore.max_windows_undo. The default here is 3. I can't tell you whether a change requires a restart.
In many cases, a restart is needed for a new setting to begin.