As I was browsing around on Google the other day, I noticed a neat little tool they have called Google Pack, which essentially downloads and installs some of the most basic applications that you may typically need on your PC. See below for the list of apps.
Now generally I would use most of these applications on my own PC, but there are some I do not typically use. For instance, I do my best to stay away from using any types of toolbars as they cause problems more often than not. What you could do in this case for Firefox is install it and then disable the toolbar.
Google Pack is a customizable download complete with a web browser, office applications (Google Apps), antivirus (avast), Photo editor (Picasa), Skype, Google Earth, Adobe Reader, Google Talk, and RealPlayer. All of these software applications are optional.
I would personally use this software just for the ease of installing these apps from one location to save time.