Warn when closing multiple tabs in Private Window

[KERR]

I use private windows for a lot of "throwaway" browsing like ebay rabbitholes and stuff that I don't want cluttering up my history.

Unfortunately I've hit Ctrl+Shift+W by accident a few too many times which instantly closes the entire window, without any warning. I suppose this is a handy "boss key" for some people...

Any chance we could have a setting to warn when closing multiple tabs on a Private Window?

[ceramic]

came from google in need for this function

as a workaround i'm using Tab Session Manager with checked option to save secret windows (at least they are not saved in firefox history)