While I don't like the branding move at all, I think the concern that people will start calling them moz-colon-forward-slash-forwadslash-a is a little ridiculous. Is Sony's line of laptops Analog Wave One Zero? Is Verizon Verizoncheckmark? Is Johnson & Johnson Johnson ampersand Johnson? Is Comcast CComcast? No, because people aren't complete idiots. Those that are going to know/care about Mozilla will be able to tell…
If asked to pronounce it, without news articles telling me to say "Mozilla", I'd be 100% uncertain of what to say.