Bootstrap button - remove outline on Chrome OS X

Question

I am looking to achieve this: http://getbootstrap.com/javascript/#popovers-examples - scroll to the \"live Demo\" and hit the red popover button, in Chrome on OS X.... It\'s per

Answer 1

In the mixins of the Bootstrap sources Sass files, remove all $border references (not in the outline variant).

@mixin button-variant($color, $background, $border){ 
$active-background: darken($background, 10%);
//$active-border: darken($border, 12%);    
  color: $color;
  background-color: $background;
  //border-color: $border;
  @include box-shadow($btn-box-shadow);
  [...]
}

Or simply code you own _customButton.scss mixin.