Firefox 31.0 & NoSquint

If you're using both Firefox 31.0 and the NoSquint 2.1.9 add-on (which I highly recommend for its selective zooming capabilities), and websites aren't displaying properly - missing icons and/or lack of background color/images around the page - don't despair.

Under your NoSquint options (in your Add-Ons menu) check your settings in the Colors tab. Make sure NONE of these are checked: Text, Background, and Disable Background Images. Unless you need one of these to make things work for you, of course. But try without.

Also, Firefox took out the nifty Add-On bar at the bottom of the page with Firefox 29, which is where NoSquint gives access to their Site Settings, letting you set zooming specifics to your taste, which is the real power of this add-on. There's an Add-on Bar (Restored) extension which brings this back and restores the full functionality of NoSquint and other add-ons.