Skype button not working (FF or Chrome)

Handy if it works
(although I know there are some limitations as these type of
links will often generate a popup on your computer to ask for permission,
but in this case, you didn’t even get that..)

The only way I get it to work is:

– open the link a new tab or window
– click, hold, drag it into the Skype

But the way it’s supposed to work – just normal left mouse click – doesn’t do anything.