Ubuntu 12.04 64-bit. J-Web login screen displayed (example: http://jamesnt.files.wordpress.com/2012/07/image7.png ). After login, UI should appear (example: http://www.juniper.net/techpubs/images/s039706.gif ) but instead Firefox shows a completely blank white page. A similar machine without upgraded Firefox works fine. The page is working in Chromium. Resizing the Firefox window shows some elements compressed into the top left corner (similar to attached image here: https://support.mozilla.org/en-US/questions/1019096 ). Changing page style to "No Style" shows the basic elements. I've tried in safe mode and the result is the same. Can anyone help? Thanks.