Hey there! I totally get how frustrating it can be when your tabs keep closing unexpectedly. It sounds like you're not alone in facing this issue since the recent update. A common solution to this kind of problem is to try clearing your browser's cache and data. This often helps in resolving unexpected behavior after updates. You can do this by going to the iOS Settings app > Firefox > Clear Data. Give that a shot and see if it helps stop those tabs from closing on you. If you're still facing problems, don't hesitate to reach out to our awesome Firefox community here for further assistance.