This is an add-on that I really like. Right now I have 25 tabs open in 3 rows at the top of the browser.
If you're blogging, that means you have to refer to a number of open tabs besides the ones that you normally like to keep open. When you're furiously surfing, 25 is not a stretch.
There are other settings, such as opening the new tab next to the one where you click. This makes a big difference in jumping back and forth between the tabs you're working on.
Just download it.
NB: I'm categorizing this as "GTD" because it really streamlines the process of getting things done online.