When we decided to move SUMO to a new platform [https://www.coffeeonthekeyboard.com/the-evolution-of-sumo-339/], one of the reasons we chose Django [http://www.djangoproject.com/] was code sharing and reuse—specifically that SUMO [http://support.mozilla.com/] and AMO [https://addons.mozilla.org] would be able to share code,