An odd outline keeps appearing as I tab through elements on a website, but only in Firefox and not in Chrome, Safari, or Opera.
To identify the element causing the focus, I used Firebug console by typing: document.activeElement. It showed:
>>> document.activeElement
<html>
I then tried using CSS to remove the outline with:
html {outline: 0}
Unfortunately, the outline persisted. How can I eliminate it?
p.s: I tested tabbing through other websites like Google and Facebook, and did not encounter this type of outline.