Opening a tel:// link doesn't open dialer-app

[Chris Wayne]

When clicking a link to tel://blah, the browser says it doesn't know how to handle the link, rather than opening the dialer-app.

Steps to reproduce:
1) Open browser
2) Search for a business on Google
3) Click the "Call" result
4) Note the dialer-app is not opened

Expected results:
Dialer is opened to the provided number

Actual results:
Browser tries to open link, fails

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: webbrowser-app (not installed)
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Fri Nov 8 12:39:45 2013
InstallationDate: Installed on 2013-04-26 (196 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: webbrowser-app
UpgradeStatus: Upgraded to saucy on 2013-08-13 (87 days ago)

[Adnane Belmadiaf (daker)]

Actually tel & sms :

tel:TEL_NUM
sms:TEL_NUM

[Christopher Yeleighton (giecrilj)]

Actually also mailto :
<URL: mailto:<email address hidden> >
This behaviour is consistent with how the Web browser refuses to handle unsupported media types, e.g. image/tiff: nothing happens when you press and a new tab comes blank. Is this by design? It does not look like a good one.

[Christopher Yeleighton (giecrilj)]

Oops, my bad: the mailto URL shows the Network Error screen, and so does <URL: news:news.answers >. The message in the Network Error screen is bogus; no amount of refreshing will ever fix the problem.