When multiple tabs in your browser are not enough, try splitting your browsing area instead.  Split Browser, an add-on for Firefox, divides up the context area of the browser in many ways.  Want an over the top example?

That might be a little extreme, but it does help to point out that this extension will let you split your browser up however you see fit to do so.

How often do you still use bookmarks? 
Generally speaking, I find there are two types of browsing people.  You have those who still bookmark everything they find interesting, and then those who only bookmark what they need, and Google everything else.  A lot of the time, typing something into the search box might be a faster way to launch a web page, rather than searching through a bucket-full of saved links.
Take a stand, and leave you thoughts in [...]

Ever needed to see your Firefox status bar when browsing in full screen mode (you can get into full screen mode by hitting the F11 key on your keyboard).  If you answered, “Yes, tell me more!” do I ever have that add-on of your dreams.
Simply called Full Screen Status Bar, this add-on for Firefox shows the status bar in full screen mode.  It is a very simple tweak that should make many full screen web browser users very happy. [...]

Nobody likes having to click on checkboxes, in our e-mail or on the online forms we might need to fill out.  It is a pain in the rear process, that I wish sometimes I did not have to do.  With that said, I have found one experimental add-on that promises to make the pain go away.
CheckBoxMate, an add-on for Firefox, allows you to check multiple checkboxes with ease by drawing a box around them to automatically select them all.  Here [...]

Want to make your mouse work for you in Firefox?  There are several handy keyboard and mouse combinations you might want to start memorizing.  For those of us who spend our day with one hand on the mouse and the other on the keyboard – these shortcuts can sometimes be faster than doing things the manual way or with keyboard shortcuts alone.
Shift + Scroll Down = Go Back a Page
Shift + Scroll Up  = Go Forward a Page
Ctrl + [...]

Every single day it seems like there are more and more great Firefox resources out there. If you are as big of a fan of Firefox as I am, you know you have to try out all the best extensions at least once. Here is a list of the best extensions out there for power users.