Fix another error message

Author: janodvarko

lib/trigger-toolbox-overlay.js

@@ -166,11 +166,13 @@ const TriggerToolboxOverlay = Class(
     }
 
     if (!harOverlay.automation) {
-      let pref = "devtools.netmonitor.har.enableAutoExportToFile";
-      let autoExport = Services.prefs.getBoolPref(pref);
-      if (!autoExport) {
-        Cu.reportError("You need to set '" + pref + "' pref to enable " +
-          " automated HAR export (browser restart is required)");
+      let pref1 = "devtools.netmonitor.har.enableAutoExportToFile";
+      let pref2 = "extensions.netmonitor.har.enableAutomation";
+
+      if (!harOverlay.automation) {
+        Cu.reportError("You need to set '" + pref1 + "' or '" + pref2 +
+          "' pref to enable automated HAR export " +
+          "(browser restart is required)");
       }
       return;
     }