I have firefox for android installed and have set up "delete browsing data on quit". I made sure all boxes are ticked and when I press quit it does delete my browsing data, however the recently closed tabs section still keeps all its info retained, in effect my browsing history does not get deleted until I do it manually and then quit firefox. I deleted the app cache and when that did not work, I did a fresh reinstall of the firefox app and the issue still persists.