Page timer

simply click on the timer icon, enter the duration of the countdown in the format XXhXXmXXs (X in 0-9) and press "go" button or press enter to launch the countdown. for instance if you want to be brought back to a page 10 minutes in the futur, click the icon, enter '10m' and press enter.
To report a bug or to suggest a functionnality, please go to the extension's blog : http://pagetimer.blogspot.fr/