How to remove Firefox's dotted outline on BUTTONS as well as links?

Question

I can make Firefox not display the ugly dotted focus outlines on links with this:

a:focus { 
    outline: none         


        

Answer 1

No need to define a selector.

:focus {outline:none;}
::-moz-focus-inner {border:0;}

However, this violates accessibility best practices from the W3C. The outline is there to help those navigating with keyboards.

https://www.w3.org/TR/WCAG20-TECHS/F78.html#F78-examples