I can see the slider and it definitely works, but the layout of the page is messed up in a small viewport. Opera renders it fine.

There's probably something in the page's source or CSS code that Firefox in particular doesn't like. Not my strong suit I'm afraid, but I'll give it a peek just in case.

Whatever it is, it is in the dynamic rules for the intermediate mode.

The smallest viewport mode renders correctly, and so does the biggest, but the intermediate mode renders wrong. It's like the text columns can't squeeze enough and get pushed under the slideshow, which is comically stretched - could be a minimum width rule being interpreted more literally or liberally in different browsers.

Cutting the slideshow node from the code makes the page render correctly, so I would start troubleshooting there.

PS. I just realised the slideshow is wrong in the largest mode as well, so it's the slideshow node's code or code related to it that is making it position wrong in Firefox. I'm no expert in page design, I'm afraid, so I don't know how to fix it.

The slider is a built in function within my divi theme. It works fine in all other browsers including the last version of mozilla. Do you know of any CSS to possible make this view accurately?

I can't find the value that would fix things in Firefox; it'll be up to people more experienced with this theme and/or page code in general.

Hmm, the style sheet http://bxcell.com/wp-content/themes/Divi/includes/builder/styles/frontend-builder-style.css?ver=2.5.3 contains this rule:

.et_pb_slider { position: relative; overflow: hidden; }

If you disable the overflow:hidden rule on that div, the slider expands to full width. But... that shouldn't be necessary. I can't figure out why that div isn't expanding to full width by default. Perhaps a question for the theme author?

Thank you so much! This worked! Now to put the file in my child theme...Thanks again!