Difference between Safari and Firefox

I viewed the website I made in dreamweaver on Survivor (http://mywebspace.quinnipiac.edu/jmgrado/survivor_home.html) in Safari and Firefox. I found minor differences, but even though they're minor they can throw off any website. In safari, everything was laid out as I wanted it to be, except for some unexplainable white space on a page. In firefox, the menu and the bottom of the site were a few pixels away from where i wanted them to be. I find this as a problem because what is a client uses firefox? The designer could have made a great website that looks fantastic in Safari, but in firefox it could look unorganized and ugly. Another thing, is that a blue box appears around the button in firefox, whereas in safari, there is none.

Way to show my work

http://activeden.net/item/true-3d-flip-book-with-cms-as3-01/105276

http://activeden.net/item/blades-xml-banner-rotator/132841

I do really like these two ways to show my work for this past semester. In the first, the advantage is being able to show SWF files in individual pages, but I think that the banner rotator would be good as the single way to show my work. Unfortunately, there is no way to show all of the links at once; one would have to keep clicking to get to an assignment that they want to see.