In Firefox you would have to close each non-private window individually as I'm not aware of a way to easily close multiple windows like you want. If you want to keep tabs in a normal window since Firefox may open a website in an already open regular window. Note that there might be issues in case you have pinned tabs.

• https://support.mozilla.org/en-US/kb/restore-previous-session

See also the new Firefox View page to only see non-private windows.

• https://support.mozilla.org/en-US/kb/how-set-tab-pickup-firefox-view

In Firefox you would have to close each non-private window individually as I'm not aware of a way to easily close multiple windows like you want. If you want to keep tabs in a normal window since Firefox may open a website in an already open regular window. Note that there might be issues in case you have pinned tabs.

• https://support.mozilla.org/en-US/kb/restore-previous-session

See also the new Firefox View page to only see non-private windows.

• https://support.mozilla.org/en-US/kb/how-set-tab-pickup-firefox-view

if I do that though, won't it not save the session, only the last closed window?

at the moment I'm using an extension to save my tabs just in case for moments like this, but I also had issues with the extension as well, so I rather avoid relying on it too much

Yes only the last closed regular window would be restored (you can't restore PB mode windows). Firefox can by default undo three closed windows (browser.sessionstore.max_windows_undo). I'm not sure I understand what you want to do with closing window(s). Is your normal session having a set of regular windows and during this session you open additional PB mode windows and during this session you open external links in Firefox ? Do the external links open in a new window or open in an existing window? In a scenario like this, what do you want to close and what to keep?

Yes only the last closed regular window would be restored (you can't restore PB mode windows). Firefox can by default undo three closed windows (browser.sessionstore.max_windows_undo). I'm not sure I understand what you want to do with closing window(s). Is your normal session having a set of regular windows and during this session you open additional PB mode windows and during this session you open external links in Firefox ? Do the external links open in a new window or open in an existing window? In a scenario like this, what do you want to close and what to keep?

say I have 2 incognito windows

for some reason, say like a third party program opens a link using firefox

I have firefox set to open to previous sessions/windows, so it opens, say 3 normal windows(non incognito)

If I pick close all windows, it'll ask me if I want to close all tabs on each 3 windows, which means I have to close each one manually, and next time I open firefox normally(non-incognito) it'll only open the last window I closed because that was the last "session"

if I choose to "exit firefox" it closes the incognito windows as well

so what I'm trying to ask is, in this case

I want to be able to close the 3 normal windows, without closing the 2 incognito windows but also have it so next time I open firefox normally, not in incognito, it'll open the 3 windows, instead of the last window I closed normally

if I exit firefox, it closes everything, including the incognito windows

If I pick Close all windows, it'll only open the last window closed, instead of all of the ones from before