[Faark]

> What data does the password use retain? IIRC password store retains the "time first used, time last used" and displays that visibly.

Lets compare it to downloads. That's another feature that leaves quite a bit of "compromising" info but users might still want to use it. I am thankful that Firefox does still allow downloads in private mode and did not just disable it. Sure, I could copy all the links into a non private session, but that would be annoying.

Similarly, imagining a situation were saving passwords from private windows might come in handy doesn't seem like a hard stretch to me. It also pretty obviously leaves a trace, just like a download, and thus shouldn't create much user confusion.