This is regarding private window in the latest update - 50.0.2

If I right click on the Firefox icon on the taskbar, I still get the option of private window, which I choose. But, when it comes up, the TAB is private but the window is not - first difference from before. Second, when I type in an address or click on the home icon, the TAB appears to no longer be private. Third, if I open a new tab, it has no indication of being private and the page has the childish cartoons that started with the last few updates. Fourth, things get pinned to the right click menu, which started happening only after I started using Kaspersky's secure browser for certain websites - not sure if that's your problem or theirs. Please fix. Thank you.