问题
Firefox mobile on Android tablet places a default outline around an anchor element when it recieves focus with a tap event. I can find no way to remove it ie the equivalent of
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
for Firefox.
回答1:
I don't think that this is possible through css for mozilla browsers.
http://peter.sh/experiments/vendor-prefixed-css-property-overview/
Maybe you could bind a Javascript EventListener "onfocus" to the anchor with a callback which automatically blurs the element when it is focused. It's more like a hack, but it should do the job
来源：https://stackoverflow.com/questions/9588812/remove-tap-outline-from-anchor-element-on-android-device-viewed-with-firefox-mob