Tor a privacy oriented encrypted anonymizing service, has announced the launch of its next version of Tor Browser Bundle, i.e. Tor version 4.0.4, mostly supposed to improve the built-in utilities, privacy and security of online users on the Internet. Tor is generally thought to be a place where users come online to hide their activities and remain anonymous. The anonymity suite also includes 3 Firefox extensions: Torbutton, NoScript and HTTPS-Everywhere. The new Tor version also include some bugfixes: Bug 14203: Prevent meek from displaying an extra update notification.
Source: https://thehackernews.com/2015/02/tor-browser-download.html