Opens a new tab with a visual timer and random gradient background.
Classroom Timer Extension
Simply click the extension's icon and you'll open a new timer page.
The live countdown shows students how much time they have left and a notification bar pops up when the timer is complete.
Click the Start button to start the timer. If a timer is already running or paused, the timer will restart from the current input times.
Click the Pause button to pause and resume your timer.
Click Reset to zero out the input values and timer.
Click Cancel to close the tab.
Source Manifest.json
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