diff --git a/builds/4chan-X.user.js b/builds/4chan-X.user.js
index 21042d562..f97f7b1fb 100644
--- a/builds/4chan-X.user.js
+++ b/builds/4chan-X.user.js
@@ -131,7 +131,7 @@
   Config = {
     main: {
       'Miscellaneous': {
-        'JSON Navigation': [true, 'Use JSON for loading the Board Index and Threads. Also allows searching and sorting the board index and infinite scolling.'],
+        'JSON Navigation': [false, 'Use JSON for loading the Board Index and Threads. Also allows searching and sorting the board index and infinite scolling.'],
         'Catalog Links': [true, 'Add toggle link in header menu to turn Navigation links into links to each board\'s catalog.'],
         'External Catalog': [false, 'Link to external catalog instead of the internal one.'],
         'QR Shortcut': [false, 'Adds a small [QR] link in the header.'],
@@ -7970,7 +7970,9 @@
         endEvents: 'mouseout click',
         asapTest: function() {
           if (isVideo) {
-            return el.videoHeight || el.naturalHeight;
+            return el.videoHeight;
+          } else {
+            return el.naturalHeight;
           }
         },
         noRemove: true,
diff --git a/builds/crx/script.js b/builds/crx/script.js
index a8a3aa1ca..cee0578fd 100644
--- a/builds/crx/script.js
+++ b/builds/crx/script.js
@@ -107,7 +107,7 @@
   Config = {
     main: {
       'Miscellaneous': {
-        'JSON Navigation': [true, 'Use JSON for loading the Board Index and Threads. Also allows searching and sorting the board index and infinite scolling.'],
+        'JSON Navigation': [false, 'Use JSON for loading the Board Index and Threads. Also allows searching and sorting the board index and infinite scolling.'],
         'Catalog Links': [true, 'Add toggle link in header menu to turn Navigation links into links to each board\'s catalog.'],
         'External Catalog': [false, 'Link to external catalog instead of the internal one.'],
         'QR Shortcut': [false, 'Adds a small [QR] link in the header.'],
@@ -7978,7 +7978,9 @@
         endEvents: 'mouseout click',
         asapTest: function() {
           if (isVideo) {
-            return el.videoHeight || el.naturalHeight;
+            return el.videoHeight;
+          } else {
+            return el.naturalHeight;
           }
         },
         noRemove: true,