windows:

new tab window
options window
popup
extension icon

new tab window

can show the tasks
the current timer
cancel/continue
select new tab background

options window

length of pomodoro
length of short break
length of long break
every how many pomodoros should the user have a long break
new tab background

popup

link to options
current timer
cancel/continue

extension icon

different icon base on state
when active - show a timer
when not active something else