[RainDawg]

Firefox is just the browser portion of the Mozilla suite. In fact, I believe it's undergone more development in recent months, and therefore is the definitive Mozilla browsing product. I would recommend making the move to Firefox. Mozilla.org will have quite a few more details about what the specific differences are.

On the second question, I've not come across anything with the list of features that Indesign has. I am sure much of this could be accomplished with Open Office and a few other programs, but I doubt there's anything quite this slick. For professional applications, I don't have a problem with paying for good software, and Abobe really does make good software.