Mozilla is offering a free Firefox OS smartphone to any app developers who have created an HTML5 iOS or Android app, if they port it for Firefox Marketplace.
Geeksphone are a Spanish startup smartphone maker who have built a couple of devices in partnership with Firefox that are only available as developer previews at the moment.
The Firefox OS smartphones - all of which have been budget devices - have proved a huge success since being released a few months back.
At the moment no Firefox OS phones are available in the UK through a network carrier, but the company has said it is currently working on more partnerships, including with higher end manufacturers.
The other smartphone which currently runs on Firefox OS, the Alcatel One Touch Fire, is available in Poland through Deutsche Telekom's T-Mobile brand.
In attempt to bolster the Firefox Marketplace before the initial release of the OS, Mozilla offered phones to developers who were creating apps especially for Firefox OS back in May.
With this move aimed at porters, it looks like Mozilla could be gearing up for an expansion in smartphones which run on the OS.