While it has yet to become a significant player in the smartphone market, Mozilla is hoping that its open-source Firefox OS will be a game changer when the mobile operating system gains a larger presence in countries like the United States and United Kingdom. In the meantime, the software maker has gone on the offensive against rival platforms iOS and Android. Mozilla chief technology officer Andreas Gal, in an article published by The Guardian this afternoon, criticized iOS and Android for being “closed systems” that rely on proprietary software with “almost a complete lack of transparency.”