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

I have little research in config section of mozilla add this too

 :-moz-any-link:focus {
    outline: none;
 }
 a, a:active, a:visited, a:hover {
    outline: 0;
}

then

:focus {
   outline: none;
}

then

::-moz-focus-inner {
      border: 0;
}