There are others trying to break the Android-iOS stranglehold -- Tizen for one, Ubuntu for another -- but Milanesi saw Firefox OS as the leader for now. "If you look at all the alternative OSes that have come out of this [emerging market] mind set, Mozilla has done the most ground work, and is a step ahead of the rest," she said.
And she accepted Mozilla's argument that Firefox OS could make cheaper smartphones possible. "On the hardware side, you don't have to put so much power on the device, don't need such a powerful processor, so you can lower the cost," Milanesi said. "That means carriers won't have to put so much toward subsidies."
Milanesi speculated that Firefox OS phones might do best in markets where customers primarily make and take calls, and have much less interest in using them as Internet-connected devices. Even so, she struggled to identify what Firefox OS offered that Google's Android, which already runs on a broad price-and-performance spectrum of handsets, does not, other than it isn't' Android.
"Mozilla clearly getting traction both on the operator and [smartphone] vendor side building on the need by both to become less reliant on Android," Milanesi tweeted.
Gold was markedly colder to Firefox OS than Milanesi, but identified the same reason why Mozilla's been able to attract carriers and handset makers.
"Consumers may not really care what the operating system is, but carriers do. They want choice, because then they can go back to negotiate with Samsung, with Apple," said Gold. "[Firefox OS] would give them leverage. That's why they want a third OS."
At MWC today, carrier officials said almost exactly that as they complained that mobile OS vendors -- meaning Google and Apple -- made fortunes on their backs, and that Firefox OS may inject enough competition to shake up the current business models.
"We need a more balanced relationship with the OS owners," Vodafone Group chief executive Vittorio Colao said at the conference. "With more competition, the relationship will be more balanced, and eventually, the winners will be the ones who have the best products, the lowest prices, and the highest willingness to invest, with us, in the channels."
That last didn't go unnoticed by Gold. "The carriers would love to get back to where they were five, six, seven years ago, when each had their own app environment, and the only apps for their [handsets] were those from their own stores," Gold explained.