Mozilla showed off a preview of the new version of its Firefox OS mobile operating system at Mobile World Congress in Barcelona, Spain. One big change is in switching among tasks, where you can slide your finger in from the left or right edge of the screen to leaf through the apps like pages.
One of the biggest changes coming to Firefox OS in the next year will be a unified search mechanism that leads users to content on the phone, on the Web, or to the Web-based applications Firefox OS runs. It starts off as a small label at the top of the screen showing what app is running or Web page is open.
When you pull down a little bit from the top of the universal search bar, it expands into a more spacious view into which you can type search queries. Pulling down even farther invokes a status bar -- not the Android-like notification bar in today's Firefox OS.
A long-distance pull down from the top of the screen shows tasks if you want to switch from one app to another. It can also be reached with a long press on the home button, a feature in today's Firefox OS.