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."
"It’s hard to keep everything straight with dozens of tabs all crammed into a little strip along the top of your browser," adds Raskin. "Your tab with a search to find a pizza parlor gets mixed up with your tabs on your favorite band. Often, it’s easier to open a new tab than to try to find the open tab you already have. Worse, how many of us keep tabs open as reminders of something we want to do or read later? We’re all suffering from infoguilt."
Tab Candy shows the user an overview of all tabs so they can be quickly located, and includes some other organizational features like lightweight grouping and tab groups.