Those of you using some of the latest versions of Firefox, Firefox 4 Beta2 and up, will know about AppTabs.
Essentially, an AppTab is a tab that's always kept open, ready for use, showing just the favicon. AppTabs help keep your browser uncluttered, and help you get to you favorite sites quickly.
So the question is, what do you keep in your AppTabs? Mine are;
You can download the latest version, Firefox 4 Beta4 here by the way.