Firefox OS smartphones are the first devices powered completely by Web technologies. It includes all the things people expect from a smartphone — calls, messaging, email, camera — and those that they want, such as built-in social integration with Facebook and Twitter, location-based services like Nokia HERE maps which include local transit and traffic information, much-loved features like the Firefox Web browser, the Firefox Marketplace and much more.
So you can take control of your life online and you can use the Awesome Bar (URL Bar) to get where you want to go quickly.
Developers can now build apps powered by open Web standards (like HTML5, JavaScript and CSS) and new Mozilla pioneered Web APIs that enable Web apps to access the underlying capabilities of the handset previously only available to native apps (e.g. camera, telephony, messaging, Bluetooth).

Adaptive App Search

With Firefox OS, you can easily discover apps that you need only once (one-time use apps) or find apps that you might download to use frequently. Firefox OS gives you a completely customized experience and helps you get the exact content you want, when you want it.

When you swipe to the right from the home screen, you are presented with a search bar and list of apps by topic for the Adaptive App Search. If you enter cafe in the search bar, your phone background image will change to represent a cup of coffee and bring up multiple app options — maybe for buying coffees, sharing with friends, etc.