This applies to the latest Firefox for Android version (this issue did not occur with the previous version). I manually closed my tabs and closed the Firefox app when I exit. However, when I open the app again, the previously closed tabs are there as if they were never closed. This is fixed if I delete browsing data but, obviously, this is not an ideal solution. I have tried to attach a short clip of this issue in action but it will not upload. Any help would be appreciated. Thanks.