I'm still wondering and annoyed about #Firefox not allowing using #tab #isolation #containers in #private #mode. It would be a nice combination. Now you'll have to choose, private mode or isolation, which is kind of #yuk #fail.
I wish #tab #containers would work with #Firefox in #private #browsing mode. Currently options are normal browsing mode with tab #isolation or private browsing mode without tab isolation. Why those modes simply can't be combined for better #privacy?