diff --git a/src/ZenKeyboardShortcuts.mjs b/src/ZenKeyboardShortcuts.mjs
index 2655ddd..79e095d 100644
--- a/src/ZenKeyboardShortcuts.mjs
+++ b/src/ZenKeyboardShortcuts.mjs
@@ -709,11 +709,16 @@ function zenGetDefaultShortcuts() {
     )
   );
 
+
+
+
+
+
   return newShortcutList;
 }
 
 class ZenKeyboardShortcutsVersioner {
-  static LATEST_KBS_VERSION = 3;
+  static LATEST_KBS_VERSION = 4;
 
   constructor() {}
 
@@ -768,6 +773,18 @@ class ZenKeyboardShortcutsVersioner {
   }
 
   migrate(data, version) {
+    // Explain: How to add shortcuts
+    /*
+      new KeyShortcut(
+        'ID_OF_SHORTCUT',
+        'KEYCODE',
+        '',
+        GROUP_OF_SHORTCUT,
+        KeyShortcutModifiers.fromObject({ accel: true, alt: true }), //accel = Ctrl/Cmd, Alt = Alt/Option
+        'code:NATIVE_CODE_FUNCTION()',
+        'L10N_STRING_FOR_TRANSLATION'
+      )
+    */
     if (version < 1) {
       // Migrate from 0 to 1
       // Here, we do a complet reset of the shortcuts,
@@ -812,6 +829,29 @@ class ZenKeyboardShortcutsVersioner {
         }
       }
     }
+    data.push(
+      // Added by gunir
+      // Prev Tab Ctrl+Left
+      new KeyShortcut(
+        'zen-previous-tab',
+        'VK_LEFT',
+        '',
+        ZEN_OTHER_SHORTCUTS_GROUP,
+        KeyShortcutModifiers.fromObject({ accel: true }),
+        "code:gBrowser.tabContainer.advanceSelectedTab(-1, true);",
+        'zen-shortcut-previous-tab'
+      ),
+      // Next Tab Ctrl+Right
+      new KeyShortcut(
+        'zen-next-tab',
+        'VK_RIGHT',
+        '',
+        ZEN_OTHER_SHORTCUTS_GROUP,
+        KeyShortcutModifiers.fromObject({ accel: true }),
+        "code:gBrowser.tabContainer.advanceSelectedTab(1, true);",
+        'zen-shortcut-next-tab'
+      )
+    );
     return data;
   }
 }