Mozilla Flutter

mozilla-flutter.css

#featured-addons li.flutter {
    -moz-animation-duration: 1s;
    -moz-animation-iteration-count: infinite;
    -moz-animation-name: flutter;
    -moz-animation-timing-function: linear;
}

@-moz-keyframes flutter {
    0% { -moz-transform: matrix(1, 0, 0.3, 1, -10px, 0); }
    50% { -moz-transform: matrix(1, 0, 0.4, 1, -20px, 0); }
    100% { -moz-transform: matrix(1, 0, 0.3, 1, -10px, 0); }
}