Page doesn't work on Firefox 35. Javascript/HTML FAIL:

  SecurityError: The operation is insecure. foobub.slidemailapp.com:100
  TypeError: Parse.initialize is not a function  foobub.slidemailapp.com:110

There seems to be a cross-site scripting attempt in there. Firefox doesn't allow that.

Also, the </html> tag is supposed to go at the END of the file.