Firefox visual issues with site

I am having issues with the front end of http://www.wilkinsmfg.com/ when viewing with firefox. I have tested other sites with same theme and wordpress version which are all up to date including plugins and they seem to be fine. I have replaced wordpress files (4.2.2), plugins, and theme files(Enfold - http://www.kriesi.at/themedemo/?theme=enfold-overview ). The link below will show a screenshot of the issue. I have deactivated the plugins folder with no change in firefox visual.

http://snag.gy/K4MqO.jpg