Removing rounded corners from a <select> element in Chrome/Webkit

Answer 1

Solution with custom right drop-down arrow, uses only css (no images)

select {
  -webkit-appearance: none;
  -webkit-border-radius: 0px;
  background-image: linear-gradient(45deg, transparent 50%, gray 50%), linear-gradient(135deg, gray 50%, transparent 50%);
  background-position: calc(100% - 20px) calc(1em + 2px), calc(100% - 15px) calc(1em + 2px), calc(100% - 2.5em) 0.5em;
  background-size: 5px 5px, 5px 5px, 1px 1.5em;
  background-repeat: no-repeat;

  -moz-appearance: none;
  display: block;
  padding: 0.3rem;
  height: 2rem;
  width: 100%;
}

  

  
Example