Hi rajeevba, things do change and sometimes article updates run behind. In [[Private Browsing in Firefox for iOS]], they show the mask on the tabs screen. There's a mask on the tabs screen to switch between the regular tabs and private tabs. Did it move to the bottom of that screen now? Someone should update the article. Actually, since you have a login to the site, you can submit a proposed edit to the article. There is an "Editing Tools" section on the right side of the page that will lead you into a view for editing. (I don't have an iPhone myself. My iPad has a more desktop-like top toolbar area, the mask is on the top left and you use it to switch between regular tabs and private tabs. With regular tabs displayed, the button is black, and with private tabs displayed, the button is purple. That's probably something for a new section of the article, or maybe there's an iPad article somewhere else.)