Wyzo is a web browser that works very well with torrents.
Just be careful that what you download is legal.
Wyzo For Windows and Mac.
"BitTorrent Integration
Downloading BitTorrent files has never been easier - Wyzo lets you browse and download torrents right from within your surfing environment - thats right, no other software required!"
"Fully Compatible
Wyzo is fully compatible with all your favourite Add-ons for Mozilla-based browsers, such as Firefox..."