Firefox 4 Tips: Using Tab Groups

Firefox 4 Tips: Using Tab Groups: "For those who love using tabs, but tend to fill up the tab strip, Tab Groups are the perfect solution. With Tab Groups, you can sort your tabs in sets. This works well if you want to organize tabs by task or function. Another great feature of Tab Groups is being able to have your tabs on standby without using any memory like regular tabs use. Until you open a tab group, the tabs sit idle."