attempt to address the the compatibility warning "Some JS modules were moved

from resource:/// and resource://gre/ to resource://app/"

https://blog.mozilla.org/addons/2013/04/26/compatibility-for-firefox-21/

src/modules/logging.jsm

@@ -54,7 +54,7 @@ firetray.Logging = {
     if (this.initialized) return;
 
     ["resource://services-common/log4moz.js", // FF
-     "resource:///modules/gloda/log4moz.js",  // TB
+     "resource:///app/modules/gloda/log4moz.js",  // TB
      "resource://firetray/log4moz.js"]        // default
       .forEach(function(file){
         try {Cu.import(file);} catch(x) {}