diff --git a/contents/code/main.js b/contents/code/main.js
index 37f9f08..175953e 100644
--- a/contents/code/main.js
+++ b/contents/code/main.js
@@ -7,7 +7,7 @@ GNU General Public License v3.0
 ///////////////////////
 // debug mode
 ///////////////////////
-debugMode = true;
+debugMode = false;
 function debug(...args) {if (debugMode) {console.debug(...args);}}
 
 ///////////////////////