Looks like Firefox.
I use Opera... well it is now more like a Chrome with Opera features... love it.
Now if you want something new and modern UI... you should try Opera Neon.
http://www.opera.com/pt-br/computer/neon
I use Opera... well it is now more like a Chrome with Opera features... love it.
Now if you want something new and modern UI... you should try Opera Neon.
http://www.opera.com/pt-br/computer/neon