An update to Mozilla Firefox has caused it to incorrectly process input fields on webpages depending on what graphics card you have. Notice below that the input fields are much longer in the Firefox example, which pushes the Proof below the fields.
Below is a screen capture of a Job Form incorrectly displaying in Mozilla Firefox.
To correct this, you must disable Hardware Acceleration in Mozilla Firefox.
Firefox > Options > Advanced > Uncheck "Use Hardware Acceleration When Available"
Restart Mozilla and the form should display correctly.