>The new UI is not displaying the main page in FireFox on my machines. Do I need to change settings?

Firefox is tested ok with the new version. The layout on the main page should be identical on the four browsers that we tested with so far.

I would recommand to make sure you have the latest version. Then, if this persists, I would recommand you clear all temporary files in that browser. Then, if this persists, I would need to collect more info such as are you getting a totally blanked page, something, or else? An image would also be appreciated.