As of version 2.2.7, this works perfectly in Windows. Note that it requires you to allow it to run in private windows. When I first tried it, I didn't have that enabled. So instead of opening a private window, it opened its Settings page to let me set the permission.

As others said: it don't work in android, and no: enabling "run in private mode" doesn't help.

I'm on Android. As others have stated, it just closes the tab without reopening it as a private tab. It would be an awesome add-on if it worked

Edit: I changed my rating because of the reply

Don't work here. Just kill current tab and nothing in private.
Ok, thanks for reply. I put 4 star just to not cause a low rating.

Doesnt work

The idea is nice and would do just what I wanted, but it does not work. Issues found:
- If a private window is open, it does not seem to work. Even after closing the private window that was open, it does not work.

- The original tab is closed, but the new private one is not opened, so it forces you to recover the closed tab.

Thanks

useful！