CSS disable text selection

Don't apply these properties to the whole body. Move them to a class and apply that class to the elements you want to disable select:

.disable-select {
  -webkit-user-select: none;  
  -moz-user-select: none;    
  -ms-user-select: none;      
  user-select: none;
}

You could also disable user select on all elements:

* {
    -webkit-touch-callout:none;
    -webkit-user-select:none;
    -moz-user-select:none;
    -ms-user-select:none;
    user-select:none;
}

And than enable it on the elements you do want the user to be able to select:

input, textarea /*.contenteditable?*/ {
    -webkit-touch-callout:default;
    -webkit-user-select:text;
    -moz-user-select:text;
    -ms-user-select:text;
    user-select:text;
}

Just wanted to summarize everything:

.unselectable {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

<div class="unselectable" unselectable="yes" onselectstart="return false;"/>

::selection,::moz-selection {color:currentColor;background:transparent}