Change Firefox tab-switching keyboard shortcut

Generally the keyboard shortcuts you are used to will rely on the command key. One nice thing about a lot of Mac OS X menus is they will list the shortcut next to the command in question, and you can type the name of the command in the help menu when using the application in question, hover or use the arrow keys to select the menu item options that appear, and see the keyboard shortcuts.

CMD Tab is application switching, CMD C is copy, CMD V is paste, CMD Space is spotlight, swipe up with four fingers is the launcher iirc.

Also if you are in the Finder, you can click help and type shortcuts, there are lists upon lists for various tasks.

Both the control key and Fn key are modifier keys, which generally aren't intended to trigger anything by themselves. I think that even a macro program (e.g. keyboard maestro ) probably won't trigger on just a mod key. I know that Alfred won't trigger a workflow on a mod key.

There is a program called Ukulele that lets you edit your keyboard layout, and that would make it possible to remap your keyboard's behavior to your heart's content, but either you'd need to live with those keys being remapped all the time, or you'd need to select the alternate keyboard you created when you're in Safari.

Long story short, I think it's possible but will take some work and be annoying.