Google Chrome aims to be secure, fast, simple and stable. There are extensive differences from its peers in Chrome's minimalistic user interface, which is atypical of modern web browsers. For example, Chrome does not render RSS feeds. One of Chrome's strengths is its application performance and JavaScript processing speed, both of which were independently verified by multiple websites to be the swiftest among the major browsers of its time. Many of Chrome's unique features had been previously announced by other browser developers, but Google was the first to implement and publicly release them. For example, a prominent graphical user interface (GUI) innovation, the merging of the address bar and search bar (the Omnibox), was first announced by Mozilla in May 2008 as a planned feature for Firefox. Both Internet Explorer 9 and Safari (version 6) have since merged the search and address bar.