Doing this is not recommended as it regresses the accessibility of your site; for more info, see this post.
That said, if you insist, this CSS should work:
button:focus {outline:0;}
Check it out or JSFiddle: http://jsfiddle.net/u4pXu/
Or in this snippet:
button.launch {
background-color: #F9A300;
border: none;
height: 40px;
padding: 5px 15px;
color: #ffffff;
font-size: 16px;
font-weight: 300;
margin-top: 10px;
margin-right: 10px;
}
button.launch:hover {
cursor: pointer;
background-color: #FABD44;
}
button.launch {
background-color: #F9A300;
border: none;
height: 40px;
padding: 5px 15px;
color: #ffffff;
font-size: 16px;
font-weight: 300;
margin-top: 10px;
margin-right: 10px;
}
button.launch:hover {
cursor: pointer;
background-color: #FABD44;
}
button.change {
background-color: #F88F00;
border: none;
height: 40px;
padding: 5px 15px;
color: #ffffff;
font-size: 16px;
font-weight: 300;
margin-top: 10px;
margin-right: 10px;
}
button.change:hover {
cursor: pointer;
background-color: #F89900;
}
button:active {
outline: none;
border: none;
}
button:focus {outline:0;}
<button class="launch">Launch with these ads</button>
<button class="change">Change</button>