I have on my computer a stand-alone converter someone at work gave me years ago, and oddly, it does contain furlongs but only in its distance units menu; not in the speed menu! It's very convenient - no need to switch off Google's blasted cookies and ferret through the Internet just to convert a couple of numbers.
I wonder who uses the furlong at all now. It lingered in horse-racing quite recently, in England at least, but I don't know if it still does.
The Statute Mile and Yard are still the only legal road distance units in the otherwise-metric UK; but I've noticed our railways still use the Mile and the Chain (and I think Yard).