[Fix] gBrowser.mFaviconService has been removed since Fx47, it causes problems if you have configured custom toolbar button

fix #89
Bump 2016.06.08

https://hg.mozilla.org/releases/mozilla-release/rev/cbabb4769b50

Author: yfdyh000

chrome/content/tabutils.js

@@ -3099,7 +3099,8 @@ tabutils._tabPrefObserver = {
       if (!button) {
         button = document.getElementById("nav-bar").appendChild(document.createElement("toolbarbutton"));
         button.id = RegExp.$1;
-        button.image = gBrowser.mFaviconService.defaultFavicon.spec;
+        const FaviconService = Cc["@mozilla.org/browser/favicon-service;1"].            getService(Ci.nsIFaviconService);        
+        button.image = FaviconService.defaultFavicon.spec;
         button.className = "toolbarbutton-1 chromeclass-toolbar-additional";
         button.collapsed = !TU_getPref("extensions.tabutils.button." + RegExp.$1);
       }

install.rdf

@@ -4,7 +4,7 @@
     <em:id>tabutilsfixed@addon.cn</em:id>
     <em:type>2</em:type>
     <em:name>Tab Utilities Fixed</em:name>
-    <em:version>1.5.2016.06.05</em:version>
+    <em:version>1.5.2016.06.08</em:version>
     <em:creator>YFdyh000</em:creator>
     <em:contributor>ithinc (Former author)</em:contributor>
     <em:contributor>Phil Tsarik</em:contributor>