I started using Firefox when it first came out. It was a great improvement over Internet Explorer. However I am now a Chrome convert. It is much faster than Firefox, less of a memory hog, and provides built in pdf viewing (So you can avoid that intrusive bloatware known as Adobe Acrobat Reader).

If you choose to use Chrome as your browser, you can/should get a couple add-ons for privacy and safety:

NotScript - allows you to control (via a whitelist or blacklist) which sites can run scripts (It is Chrome's version of Firefox's NoScript)

Vanilla - allows you more control (via a whitelist) over which sites get to keep cookies on your computer