Vidalia is control software for Tor.[1] The Tor Browser Bundle, what you likely used, ships with a slightly customized version of Firefox.

I would also recommend upgrading, as the bundle no longer ships with Vidalia.[2]

1. https://www.torproject.org/projects/vidalia.html.en2

2. https://blog.torproject.org/blog/tor-browser-bundle-35-relea...