I would like to be able to use protoFluid during development to work on CSS for handheld and tablet themes. But I've always done this in the past with a media query:
@media only screen and (max-width: 480px), only screen and (max-device-width: 480px) -- the max-width allows protoFluid to display the mobile site because of the narrow viewport window, and then I can use FireBug to fix the CSS.
Since this plugin uses User Agent detection rather than viewport width, protoFluid won't load the handheld or tablet themes. Is there any kind of temporary hack I could use with this plugin just during development to get protoFluid to trigger the theme switch based on viewport width, and then remove it once the site goes live?