Firefox is one of the most standard browser for developers and end users which is faster than all the browsers. So if you are new to Firefox browser and if you like to learn about shortcut keys and some basic tips and tricks this cheat sheet will helps you.
If you new users that this cheat sheet may come very helpful. The Firefox cheat sheet has list of General Keyboard Shortcuts, Search Keyboard Shortcuts, Navigation Keyboard Shortcuts, Text Keyboard Shortcuts, Mouse Shortcuts, Locations and Tips / Tricks.
You can view and download (PDF file) whole Firefox Cheat Sheet here.