Remove dotted outline from range input element in Firefox

Question

Firefox, since version 23, natively supports the element, but I couldn’t figure out how to remove the dotted outline. The following

Answer 1

If you can settle for a wrapping element (it's likely you already have a wrapping LI or P), you can use FireFox-only CSS to position the input out of view and reposition the track/thumb in view.

• Note 1 - don't try to use translateX - I think FireFox uses that to actually slide the thumb - so stick with translateY
• Note 2 - Be sure to test with keyboard navigation. You should only move the input by the smallest amount possible to get the dotted lines out of sight. If you position it waaay far away (translateY(-1000em)) - then you will break usability for keyboard navigation.

Here ya go:

HTML

CSS

.range-wrap {
    overflow: hidden;
}
input[type='range'] {
    -moz-transform: translateY(-3em);
}
input[type='range']::-moz-range-track {
    -moz-transform: translateY(3em)
}
input[type='range']::-moz-range-thumb {
    -moz-transform: translateY(3em);
}

http://jsfiddle.net/pF37g/98/