Doing my part to share the knowledge around, a lot of people have requested that I do more to post alternative operating system keyboard combinations here.
So, for those of you who live the Apple lifestyle, here is the way you can navigate around the navigation bar without having to ever lay your fingers on your one button mouse.  If you know of any more (because as you can see, I am not a big Apple user) please share in [...]

Out of user demand, I have decided to re-visit the Firefox navigation bar keyboard combo cheat sheet for some of the other operating systems out there.  Here are all the keyboard shortcuts for the standard navigation bar for the various Linux distros out there.  Hopefully all the most useful ones have made it onto the list, but if there is one I missed, please feel free to add it to the comments.
Navigation Bar Keyboard Shortcuts
Choose Your OS: Windows | Linux [...]

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 + [...]

Ever find yourself wondering what the keyboard shortcut in Firefox is for opening a new tab? What about the keyboard command to jump to the search box? If you (like myself) have found yourself in this situation, you might need to study the Mozilla Firefox Cheat Sheet. This is a great list of keyboard commands and shortcuts to make any novice look like an experienced Firefox user.
[Check out the Mozilla Firefox Cheat Sheet!]