Stumble apon as im sure most people are aware is a free extension for Firefox and Internet Explorer which can be found here.
For those that dont know stumbleapon is a brilliant time waster for the bored and a brilliant tool for everyone else.
This is what theyhave to say about them selfs;
I have been using it for a few years now infact its probably one of the first extensions that i ever used on Firefox and its probably the only one that i couldn’t live without especially when bored.
Just a couple of things i have come across so far today.