Two questions:
1. Why would one change to Firefox?
2. How would one change to Firefox?
This link answers a lot:
Firefox I feel that Firefox is less vulnerable to malicious activity. The updates are also a lot less annoying than IE and they take a heck of a lot less time to download and install.
Just download it from the above link. It gives you the option to make it your default browser.
Good luck,
Ken
