The Tor Browser Bundle is a packaged Firefox web browser pre-configured to use the Tor network. All tools and programs needed to connect to Tor are included in the bundle.
The Tor Browser Bundle lets you use Tor on Windows, Mac OS X, or Linux without needing to install any software. It can run off a USB flash drive, comes with a pre-configured web browser (Firefox-based) to protect your anonymity, and is self-contained.