mozilla/persona — pull request #4181 by callahad (2014-08-23 17:44:05+00:00)
Title: Allow SVG siteLogos to be specified as data: URIs

The only legitimate MIME type for SVGs is "image/svg+xml", but our whitelist
contained "image/svg" instead.

As a result, data-URI encoded SVGs were not allowed as the siteLogo.