Firefox now updates page action icon correctly

src/platform/firefox/background.js

 			"48": 	"images/ASK_off_48.png",
 			"96": 	"images/ASK_off_96.png",
 	};
-	chrome.pageAction.setIcon({
+	chrome.browserAction.setIcon({
 		path: icons,
 		tabId: request.tabID || sender.tab.id
 	});