Mozilla is working on a new Firefox feature called "Tab Candy", which might make you more productive, or at least less irritated by the number of tabs you have open.
"The power of the browser has grown substantially in the last ten years," writes Aza Raskin, Firefox Creative Lead. "We now use the Web to multi-task the activities we juggle every day, like vacation plans, purchases, sharing pictures, listening to music, reading email, and writing a blog post."