Semicolons and style.

fluid_gmail.js

window.fluid.dockBadge = '';
setTimeout(updateDockBadge, 1000);
setTimeout(updateDockBadge, 3000);
setInterval(updateDockBadge, 5000);

function updateDockBadge() {

	var navigation = document.querySelector('[role=navigation]');
	var doc = navigation.contentDocument || navigation.ownerDocument;

	if (!doc) { return; }

	var anchors = [].slice.call(doc.querySelectorAll('a'));

	var result = anchors.reduce(function(prev, curr, i) {
		var match = curr.innerText.match(/\s*Inbox\s*\((\d+)\)[^\d]*/);
		if (match) {
			return match;
		} else {
			return prev;
		}
	}, null);

	if (result && result[1]) {
		window.fluid.dockBadge = result[1];
	} else {
		window.fluid.dockBadge = '';
	}
}