Countdown only if tab is visible

[virgilinojuca]

Could you implement the option (or maybe even by default) to have the countdown progress only is the tab is active, in order to avoid simply going to another tab to do something else and coming back later?

[videopilot]

I second this request. It would be good if I actually had to wait for each when I cmd/ctrl click to open a bunch of tabs instead of just having an extra click.