Here\'s a sample code:
Firefox applies the padding not only to the content but to the scrollbar as well.
Change your textarea
style definition so that it reads like this:
textarea
{
overflow:auto;
box-sizing:border-box;
-moz-box-sizing:border-box;
line-height:26px;
padding: 0;
padding-left: 6px;
}
This corrects the padding issue, but once there are two or more lines of text it will look somewhat awkward.