In the history, recently closed windows are always cleared. Some windows don't need to be remembered here.

[Pollux]

I often open two Firefox windows to manage my work separately. However, I've noticed that when I frequently log in, such as when using Google login across several websites consecutively, my history—specifically the list of recently closed windows—only remembers the login window and clears out my other work window.

As a result, I often lose the other window, which contains many tabs, and I have to reopen them one by one, sometimes missing some.

This is very troubling. Although these login windows don't need to be remembered, they still remain in the history, and even in the most important "history window".

We hope to improve this feature so that only truly temporary windows, such as login windows, do not need to be remembered. There's no need to waste resources on this.

[DrDude]

As developer working on multiple projects simultanious, each project window with their own set of tabs, also seems to get cleared with updates so it seems. This is pretty annoying. Please provide a checkbox option somewhere in the settings (or about:config), when checked, always retain all recently closed windows or provide a way to recover the disappeared recently closed windows ... thanks in advance.