Windows - borders around clicked things

Question

You know how sometimes where you've clicked there's a dotted border? How do you turn that off? It does it in browsers and some desktop applications (like explorer)

Answer 1

The dots show which control is currently focused.
This is very useful if you navigate the GUI with your Keyboard.
You can change the focus with TAB.

I don't think you can turn this off in Windows.

Answer 2

In Firefox, you can remove it by installing the Stylish extension and then creating a new stylesheet and plugging this in:

a:active { outline: none; }
a:focus { -moz-outline-style: none; }

I don't think you can remove it in anything outside of browsers though because anything else isn't nearly as configurable.