diff --git a/extension/js/content.js b/extension/js/content.js
index b930379..fbabc62 100644
--- a/extension/js/content.js
+++ b/extension/js/content.js
@@ -220,12 +220,12 @@
       var jsonLength = (pre && pre.innerText || "").length ;
       if (
         bodyChildren.length !== 1 ||
-        pre.tagName !== 'PRE' ||
-        jsonLength > (3000000) ) {
-
+        pre.tagName !== 'PRE' ||  jsonLength > (3000000)) {
         // console.log('Not even text (or longer than 3MB); exiting') ;
         // console.log(bodyChildren.length,pre.tagName, pre.innerText.length) ;
-
+        if (jsonLength) {
+            alert('JSON Formatter Error: Cannot format JSON longer than 3MB');
+        }
         // Disconnect the port (without even having used it)
           port.disconnect() ;