I open a new tab (link from email or a other page usually). I read the bloody thing. I click the number of open tabs to display all open. I close the tab with the x. It goes away (closes). It gives me the option to undo. I wait until that goes away. I wait few more seconds and swipe down on the "open tabs" frame. It closes and the number says 7. It agrees with what I see open, and the visible content is from tab #7 I wait 5 minutes. I close Firefox and wait 5-10 minutes. I open Firefox... I'm up to 22 now. This has been going on for about a week (at least) now. In the past before this started happening, occasionally if I was moving too fast it would happen, so I would go slower (I thought cache) and it would work. Now, it's ridiculous. NOTE : there are 7 tabs I want to keep open for now... I've been trying to close all the rest for some time now!