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Firefox OS makes its debut (pictures)

Mozilla showed its first version of Firefox OS, its browser-based operating system, at Mobile World Congress. Here's a look at the open-source project.

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Stephen Shankland
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1 of 15 Stephen Shankland/CNET

Welcome to Firefox OS

Firefox OS will look familiar to smartphone users. Here's the app screen shown on a ZTE Open.
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2 of 15 Stephen Shankland/CNET

Cut the Rope on Firefox OS

Cut the Rope, a classic mobile app that's made its way to many different operating systems, works on Firefox OS. It's shown here on a Geeksphone Peak developer phone.
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3 of 15 Stephen Shankland/CNET

Gallery app on Firefox OS

The gallery app on Firefox OS presents photos as an array of thumbnails that scrolls vertically. To do something with a photo, like share it or edit it, you must tap on it to open it.
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4 of 15 Stephen Shankland/CNET

Photo editing on Firefox OS

Firefox OS's gallery app lets you crop photos, apply some basic color filters, adjust contrast, and share photos with a system resembling Android's "intents." That lets you pick a variety of destinations registered to handle photos.
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5 of 15 Stephen Shankland/CNET

Firefox OS dialer.

Firefox OS's phone app includes tabs for a dialing keypad, an address book to find contacts, and a recent call list. This is on the Geeksphone Keon, a lower-end developer-oriented phone.
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6 of 15 Stephen Shankland/CNET

Firefox OS clock.

Firefox OS includes a clock app, unsurprisingly, which you can use to set alarms. The Geeksphone Peak shown here has a fairly sharp 4.3-inch QHD screen.
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7 of 15 Stephen Shankland/CNET

Firefox OS camera app

Firefox OS's camera app in action on the Geeksphone Peak. The phone has an 8MP back-facing camera and a 2MP front-facing camera.
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8 of 15 Stephen Shankland/CNET

Firefox on Firefox OS

Powered by Firefox OS, the ZTE Open naturally includes the Mozilla browser, too.
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9 of 15 Stephen Shankland/CNET

Firefox OS lock screen

The ZTE Open with first stage of the two-stage Firefox OS unlock screen. Pulling up from the bottom of the screen then reveals an option to unlock the phone or to launch the camera.
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10 of 15 Stephen Shankland/CNET

Facebook integration on Firefox OS.

Firefox OS's contacts app lets you import contacts from Facebook. Mozilla plans to add support for Web-based mail systems such as Yahoo Mail, Gmail, and Hotmail later.
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11 of 15 Stephen Shankland/CNET

Task-switch hiccup

A long press on the home button invokes the task switcher. This view shows one rough edge on the experience: the horizontally oriented Cut the Rope app doesn't fit well in the vertically oriented thumbnail.
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Firefox OS on a Geeksphone Keon

The opening screen of Firefox OS running on a Geeksphone Keon.
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Geeksphone Peak running Firefox OS

The Geeksphone Peak, designed for developers, is one of the first phones to sport Firefox OS. It's got a dual-core Snapdragon S4 processor running at 1.2GHz.
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14 of 15 Stephen Shankland/CNET

Firefox OS gallery app on ZTE Open

Firefox OS, shown here on the ZTE Open, has a gallery app, but if you want to share photos, you have to do so one at a time by opening it first.
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15 of 15 Stephen Shankland/CNET

Dialer app on ZTE Open

The ZTE Open feature a traditional phone dialer, with tabs along the bottom to access recent calls, contacts, and the dialpad.

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