When you click on a link and it opens a new tab in Firefox it gets put to the right off all the tabs you have open. When you have a lot of tabs open, it can be hard to find the tab you just opened. There's a free plug-in that fixes this. Once you install the plug-in when you click on links to open new tabs, the new tab is put to the right of the tab you are currently in. This makes it a lot easier to find.