Browser compatibility issues

Hi there,

I try to fix browser compatibility issues it’s works fine in Google Chrome 23ver, but on different iMacs works differently and still browser compatibility issues with Mozzila. How to fix?
Text fields (name, email) only alignment in Chrome and Mozzila is different, but width is fine.

here is some screenshots:

Website:

https://www.ads-software.com/extend/plugins/contact-form-7/