CSS “outline” different behavior behavior on Webkit & Gecko

Question

I\'m working on an experiment & I found out that the \"outline\" CSS2 property is not implemented the same way on Webkit & Gecko

In the script below, I have

Answer 1

I've fixed using this instead absolute positioning:

transform: translate(x,y);

.outer {
    position: absolute;
    top: 20px;
    left: 20px;
    height: 50px;
    width: 100px;
    background: blue;
    border: 3px solid green;
    outline: 3px dotted red;
}
.inner {
    position: absolute;
    transform: translate(80px, 15px);
    width: 40px;
    height: 20px;
    background: yellow;
}