Netopi Firefox extension for Windows

The description of Netopi Firefox extension - Play With New Friends

Netopi allows you to find out what other people think about the website you're currently visiting. You can obviously add your own reviews. This can be an item in an online shop, CNN's article, hosting company offer...The opinions are stored in a central database, not related in any way to the owners of those websites, and so, they are under no control of the owners.