Timer and addTask per KaiMing

This extension is basically popup version of the pomodoro timer but there is a twist to it. In this extension, the user are allowed to set a timer and add their own to do list. The user can set up to an hour on the timer and once the user click on the play button the timer will start counting down. As for the add task, user can enter as many words into the list since there are no word limit.