Claims it's the first of its kind to hit the HTML5-based operating system.
7digital is the power source behind music services like Samsung's MusicHub for Galaxy S devices. The company has miscellaneous partnerships with record labels globally, licensing the music to enable digital streaming.
The company now boasts the 7digital Music Store is now live on Mozilla's Firefox OS, providing users access to the catalogue that sports 25 million songs.
Meanwhile, any previously purchased songs sitting in the cloud-based 7digital Locker will also be accessible from the HTML5-based Firefox devices.
7digital says the move is part of an ongoing mobile strategy that looks to connect users at all times.
Ben Drury, CEO of 7digital , said: "The potential of Firefox OS is huge. With more than 20 hardware and operator partners around the world, Firefox OS is filling the need for a fully adaptable, unconstrained mobile platform to deliver an innovative and customisable mobile web experience. We believe this offers us a significant market opportunity as a digital music provider."
The Firefox OS debuted this week, arriving on the ZTE Open in Spain via Telefonica's Movistar network.