Linux Solution

Step 1) Open terminal

:- $ wget -q -O- http://deb.opera.com/archive.key | sudo apt-key add -

:- $ sudo sh -c 'echo "deb http://deb.opera.com/opera/ stable non-free" > /etc/apt/sources.list.d/opera.list'

:- $ sudo apt-get update

:- $ sudo apt-get install -y opera
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References
1. Firefox Home: http://www.mozilla.org/en-US/firefox/new/

2. Google Chrome Home: https://www.google.com/intl/en/chrome/browser/

3. Opera Home : http://www.opera.com/

4. Apple Safari Home: http://www.apple.com/safari/

5. Guide: http://techhamlet.com/2012/03/how-to-easily-install-safari-in-linux-the-new-updated-guide/