<!DOCTYPE HTML> <!-- testcase for https://bugzilla.mozilla.org/show_bug.cgi?id=900975 --> <html> <head> <style type="text/css"> p { margin: 20px; font-family: Arial, sans-serif; background-color: black; color: white; } .smoothing-gray { -moz-osx-font-smoothing: grayscale; } .smoothing-auto { -moz-osx-font-smoothing: auto; } </style> </head> <body lang="en"> <p class="smoothing-auto"><span>foo</span> <span>bar</span></p> </body> </html>