The Mom Addon
This is a very simple firefox extension that displays a page of your mom asking what you are up to every 20 minutes firefox is open. It is meant for the easily distracted/addicted.
To install, open: mom.xpi
For those who would like a personalized version of this extension, you can contact me:
(e.g. Different picture/color/wording/time between popping up pages, etc.)
Next version will have preference options.
Other Recommended Firefox App: Leechblock