PUBLIC MARKS with tags fun & extension

PageAddict is a Firefox extension that will help you monitor your Internet addiction. Once you install it, revisit this page (pageaddict.com) to see a summary of the time you've wasted on each web site. You can categorise different sites and restrict how much time you spend in each category in a day. If this sounds fishy, or useful, visit the questions page.

What is yakalike? - A Firefox extension that lets you chat with other users visiting the same site.

很同时上同一个网站的人交流。