It's not easy for all of us to stay in pomodoro mode. Constant struggle to don't forget on/off timers can be discouraging. At the same time working with pomodoros brings efficiency and greatly reduces procrastination.
This extension utilizes already great pomodoro tool tomato.es and adds annoying browser notifications to constantly remind you that you MUST be in pomodoro mode.
Lightweight: If you close tomato.es tab extension becomes completely idle and is removed from the memory. Just re-open it again and extension will start its work!
Safe: No 3rd party calls, your data stays secure in the tab <-> extension communication channel.
Full source code can be found on https://github.com/ziogas/pomodoro-must