The first mobile phones running Mozilla's Firefox OS are shipping today from a small Spanish company called Geekphone. The two budget handsets, the Keon and the Peak, are geared for developers that want to create apps for the new open-source mobile operating system.

The Keon includes a 3.5-inch multitouch display, 1GHz Qualcomm Snapdragon S1 7225AB processor, 512MB of RAM, 4GB of internal storage, tri-band UMTS/HSPA radio, a 3-megapixel rear camera, GPS receiver, proximity sensor, accelerometer and a 1,580mAh battery.

The more powerful Peak ships with a 4.3-inch qHD IPS multitouch display, dual-core 1.2GHz Qualcomm Snapdragon S4 8225 processor, 512MB of system memory, 4GB of flash storage, tri-band UMTs/HSPA radio, an 8-megapixel rear camera, 2-megapixel front-facing camera, GPS receiver, proximity sensor, accelerometer and a larger 1,800mAh battery pack.

Neither handset is overly impressive spec-wise but that's all part of the plan as Firefox OS is targeting lower income markets like Brazil. Pricing reflects the target audience as the Keon smartphone retails for 110 euros including VAT ($143) while you can expect to shell out 179 euros including VAT ($234) for the Peak. For comparison, the recently released HTC One retails for $575 in the US with Apple's iPhone 5 starting at $649 unlocked and contract-free.

Keep in mind once again that these handsets are designed with developers in mind. Consumer-oriented smartphones running Firefox OS aren't expected until later this year when some larger carriers deliver them to market. Either way, Firefox has a lot riding on the success of these two handsets.