Need to quickly navigate back in the browser history? Now sure, you could click the actual backwards button, in the Firefox navigation toolbar. I have another alternative for you to try though. MileWideBack is an add-on for Firefox that will let you click on the left border of your Firefox window to go back to the previous web page you were viewing.
What does does this extension for Firefox allow you to do? Well, if you can navigate forward if you right-click with your mouse on the Firefox border too. If you are using tabbed browsing, middle-click on the left border to close the current tab, or rotate the mouse-wheel to cycle through your current tabs.
To learn more about how to tweak this add-on, check out this tutorial:
So if you are looking for way to make your browsing experience more user friendly or unique, MileWideBack is well worth your time. Give it a shot, and let me know if you find browsing this way is better or worse than your more traditional methods.