Mobile news roundup: Etsy’s mobile play, Firefox’s mobile OS and more

Developers get there hands on Mozilla’s Firefox OS for smartphones — Spanish phone maker Geeksphone and Mozilla announced that developers will be able to get their hand on the first two models running Mozilla’s mobile OS named Keon and Peak. Mozilla says the Firefox OS is targeting emerging markets with low prices and better battery life.

GREE launches NFL Shuffle — Game developer and publisher GREE and the NFL teamed up for NFL Shuffle, a mobile team management game which takes advantage of the NFL license. The game is available to download for free from the iTunes App Store.

DeNA joins the ESA — Japanese mobile game developer and Mobage platform operator DeNA announced that it has joined the Electronic Software Association. The news could possible mean that DeNA will more of a presence at this year’s E3.

Appearian receives strategic investment from Intel Capital — Enterprise mobile application management company Appearian announced it received a strategic investment from Intel Capital, bringing its total funding to date to $28 million. Previous investors include Bessemer Venture Partners, Kleiner Perkins Caufield & Byers and North Bridge Venture Partners.

Etsy acquires Mixel photo-sharing app — In an official statement, Etsy revealed that mobile visits to Etsy grew by 224 percent in the last year, accounting now for 25 percent of total visits. The Mixel team will presumably help Etsy in its future mobile endeavors.

Facebook was the most popular mobile app of 2012 — The Facebook mobile app receives no shortage of criticisms, especially before it became a native app, but there is no arguing its popularity. Digital business analytics service comScore found that Facebook was the most popular mobile app of 2012 in the U.S. on both iOS and Android. comScore also found that it accounts for a staggering 23 percent of the time users spend with mobile apps. Various Google apps combined account for 10 percent of time spent.

Gameloft announces Blitz Brigade — French mobile game developer and publisher Gameloft revealed its newest title, a team-based shooter set in WWII named Blitz Brigade. The game seems to have a fun, light cartoon style and will feature different player classes, vehicles, multiple gameplay modes and single player challenges.

Chillingo launches Super Knights —  Chillingo this week brought its mobile arcade game Super Knights to Android. Before this, the game was available on iOS. Players lead a knight on a platforming adventure as he dodges enemies while swinging through levels to save various princesses. You can download the game for free here.