Good. It works well. Rated 5 out of 5 stars

Firefox 53.0.3 (e10s enabled) on Mac OS X El Capitan.
Very comfortable. Thank you very much!!

I also bring the addon's code for FireGesture's NewTab to work focusing well.

var newtab = gBrowser.addTab('about:blank');
gBrowser.selectedTab = newtab;
newtab.addEventListener('load', function(){
//document.getElementById('urlbar').focus();
document.getElementById('searchbar').value = '';
document.getElementById('searchbar').focus();
}, {once: true});

update:
Clearing searchbar as below is much convenient for me.

document.getElementById('searchbar').value = '';