body {
    -webkit-touch-callout: none; /* iOS Safari */
      -webkit-user-select: none; /* Chrome/Safari/Opera */
       -khtml-user-select: none; /* Konqueror */
         -moz-user-select: none; /* Firefox */
          -ms-user-select: none; /* Internet Explorer/Edge */
              user-select: none;
}

/*habilita a seleção nos campos editaveis*/
input, textarea {
    -webkit-touch-callout: initial; /* iOS Safari */
      -webkit-user-select: text; /* Chrome/Safari/Opera */
       -khtml-user-select: text; /* Konqueror */
         -moz-user-select: text; /* Firefox */
          -ms-user-select: text; /* Internet Explorer/Edge */
              user-select: text;
}

/*habilita a seleção nos campos com o atributo contenteditable*/
[contenteditable=true] {
    -webkit-touch-callout: initial; /* iOS Safari */
      -webkit-user-select: all; /* Chrome/Safari/Opera */
       -khtml-user-select: all; /* Konqueror */
         -moz-user-select: all; /* Firefox */
          -ms-user-select: all; /* Internet Explorer/Edge */
              user-select: all;
}