As far as comparison? The browser alone is great, after the requisite couple of days of adjustment. I'm not a real fan of their e-mail programs, admittedly, so I still use OE. Even added a button for it to the toolbar. That's what I do like, the ability to add certain functions. At the Mozilla forum I linked to, you can talk directly with at least some of the theme and extension writers. Just try getting through the front lines of former fry cooks to get a problem solved at MS.
Thanks again for your input. With IE going down in flames at the hands of hackers other options are going to become very popular. I read a story just this morning that said the number of downloads of Mozilla has doubled in just a few weeks. If Microsoft can't offer a better, safer product users will go elsewhere.
I just downloaded and installed Firefox and I like what I see. Pinning a link to FreeRepublic on the toolbar is a pretty cool feature. :-)