Firefox Issue on Form Page

http://dev.pavemend.ads-websites.com/contact_page.html
My form page views fine with Safari, Chrome and Opera. When I view it in Firefox it is all messed up. Does anyone know how I can correct this problem? I created this form using a table to control the size of the form fields. Is this my problem?

Instead of using the html attribute size="50" try using css widths and set them in pixels.
#lastname {
     width:357px;
The html attribute for size is based off of the font used, in "characters wide". How that font renders between browsres can change the size.

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