.ember-palette {
  width: 50px;
}

.ember-palette-dropdown .color-item,
.ember-palette .selected-color-item {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-block;
  box-sizing: border-box;
  vertical-align: middle;
}

.ember-palette-dropdown {
  max-height: 200px;
  overflow-y: auto !important;
  overflow-x: hidden !important;
}

.ember-palette-dropdown .ember-power-select-options {
  overflow-x: hidden !important;
}

.ember-palette-dropdown li {
  display: inline;
}

.ember-palette-dropdown .ember-power-select-option--highlighted .color-item {
  border: 2px solid #444;
}

.ember-palette-dropdown .ember-power-select-option--selected .color-item {
  border: 2px solid #666;
}

.ember-palette-dropdown .ember-power-select-option--highlighted,
.ember-palette-dropdown .ember-power-select-option--selected {
  background-color: transparent;
}

.ember-palette {
  width: 50px;
}

.ember-palette-dropdown .color-item,
.ember-palette .selected-color-item {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: inline-block;
  box-sizing: border-box;
  vertical-align: middle;
}

.ember-palette-dropdown {
  max-height: 200px;
  overflow-y: auto !important;
  overflow-x: hidden !important;
}

.ember-palette-dropdown .ember-power-select-options {
  overflow-x: hidden !important;
}

.ember-palette-dropdown li {
  display: inline-block;
}

.ember-palette-dropdown .ember-power-select-option--highlighted .color-item {
  border: 2px solid #444;
}

.ember-palette-dropdown .ember-power-select-option--selected .color-item {
  border: 2px solid #666;
}

.ember-palette-dropdown .ember-power-select-option--highlighted,
.ember-palette-dropdown .ember-power-select-option--selected {
  background-color: transparent;
}

Fix list items layout in firefox
Fix list items layout in firefox
