Firefox has many advantages over the competition, The main one being the toolbar add-in. The first one you should install is Google. The really really great thing about the Google toolbar is the builtin antip-phishing detection/protection system.
The way this works is as follows: You read an email (eg. Purportedly from PayPal) that tells you your account needs updating. You click on the link and are taken to a PayPal login page. Before you can say ‘Hey – Since when has Paypal used freescamwebsites.com for it’s website!’ an overlay:
locks the whole webpage and a suitable warning comes up. (see image)
If you are in any way concerned about Phishing scams (I have been hit myself by a spoof eBay email), get Firefox now.