How can I set yate to be my default tel: protocol handler?

On this site I clicked on the support link and a phone number popped up. It was formatted via the tel: protocol, and as such was underlined and highlighted like a web link. On my phone, clicking on such a link opens my default dialer and places the call. When links are not formatted via this protocol, my browser's Google voice plugin usually auto-detects the phone number and gives me a chance to call via Google voice. It would be nice if I could also do this for tel: formatted numbers, or better yet, as I don't always have a voice session open, set tel: formatted numbers be handled by yate. **How can I fix my browser's handling of the tel: protocol links such that it opens in yate or google voice?** - In Chromium I get a warning saying that xdg-open will be used to handle the link, but when I click 'Launch Application' nothing happens. - In Firefox, clicking on the link leads me to a blank page with the url tel:18003744432 - In Konqueror clicking on the link produces this error: Access by untrusted page to tel:18003744432 denied. I'm using Linux Mint 16 KDE x64.