Just as a quick note: I was just looking for a Firefox Plugin that enables the cursor in Firefox (for easy copy, pasting and cursor navigation through text). I knew such functionality existed, as I’ve been using this feature some years ago. I simply failed in finding the corresponding Firefox Add-on today… :(
Why? Because this feature is directly built-in to Firefox since some 2.x version.
Just hit F7, enable Caret Browsingand throw your mouse away :-) Great feature. Love it.