Yeah, but a single mouse click is even quicker.

I use it primarily when cutting/pasting a new URL into the URL bar -- frustrating when one has to first clear away the existing thing, being careful not to wipe out the clipboard holding the new URL.

But yeah, reaching for the keyboard is another option. I'm just too used to the ClearURL button from Konqueror, and want it in FF as well.

I've now edited the .xpi contents to fix the maxversion string, and also to change the icon to match that from Konqueror. All is well.