On the Android App, hitting the "back" button will eventually return you to the homepage. However, it leaves the current tab open. It would be nice if there was an option to have the current tab close when "Back" returns you to the homepage. I find that 90% of the time I dont want the tab anymore and have to manually close it. This could be implemented as checkbox option in the "Customise Homepage" settings.
Another option would be to simply reuse the last tab when opening something from the homepage screen.
Either option would solve the tab accumulation problem.