WASHINGTON DC: Mozilla has released Firefox 41 browser for desktop and Android users.    According to the Engadget, the company says that it is now the first browser to have built-in instant messaging.     The feature for now only works on the desktop browser, but allows the  users to instant message directly from a Hello video call whether they  are on Windows, Mac or Linux. The users can chat with Chrome or Opera  users because Hello is WebRTC powered, but it is not clear if instant  messaging is also supported on those browsers.       The latest version of the browser also allows the users to set a profile on the desktop browser.     For the Android version, the users can now use different search engine  at once from the search panel and swipe to close tabs. It also has  improved bookmark detection so that the users can avoid duplicates.  Firefox for Android has now fixed the support for playing MP3 files.    In addition, both Android and the desktop version have nume...