Sorry about making things so confusing. Im not the most eloquent speaker (or poster for that matter).
Dial-up internet means you sign in with a user name, dial into some telephone number, computer makes a bunch of funny noises, and your on the internet. Broadband comes as DSL line or a cable modem. This means no dialing in; you just click the Internet Explorer icon and your on the Web.
You mentioned something about images being blurry when you use your internet service. This is probably your ISP (Juno) compressing (making smaller in file size) the images so they download to your computer faster. This is common with dial-up service as pages with a lot of images can take a long time to load.
As for configuring your firewall: Im not too familiar with Macafee firewall but the link below might help.
http://ts.mcafeehelp.com/
Also, if your firewall came with a user manual, it might have a walkthrough on how to configure it.