I can make Firefox not display the ugly dotted focus outlines on links with this:
a:focus {
outline: none
Tested on Firefox 46 and Chrome 49 using this code.
input:focus, textarea:focus, button:focus {
outline: none !important;
}
Before (white dots are visible )
After ( White dots are invisible )
If you want to apply only on few input fields, buttons etc. Use the more specific code.
input[type=text] {
outline: none !important;
}
Happy Coding!!