Mozilla recently released Firefox version 31, and now this updated version of the Fedora default web browser is available for download in Fedora 20.

firefox31

In addition to the normal security, rendering, and developer tool additions a firefox release gives you, Firefox 31 now adds a Web Search field in the new tab display. To get the new version of firefox, update as normal from the official Fedora repos, and the Fedora 19 repos should be updated soon with the new version.