Addons to regulate time spent on some website

Hi,

I’m searching for an addon that could help me to regulate time spent on some website. It could be an addon that close and block the web page (as Facebook!) after 15-30 min a day.

Does it exist?

I don’t find it…

Thanks!

Hadouk


Garanti sans virus. www.avast.com

https://addons.mozilla.org/firefox/addon/focusblocker-new/