diff --git a/locales/en-US/browser/browser/preferences/zen-preferences.ftl b/locales/en-US/browser/browser/preferences/zen-preferences.ftl
index b403bad5a..62f8eebd9 100644
--- a/locales/en-US/browser/browser/preferences/zen-preferences.ftl
+++ b/locales/en-US/browser/browser/preferences/zen-preferences.ftl
@@ -283,7 +283,8 @@ zen-page-info-shortcut = View Page Info
 zen-find-shortcut = Find on Page
 zen-search-find-again-shortcut = Find Again
 zen-search-find-again-shortcut-prev = Find Previous
-zen-search-find-again-shortcut-2 = Find Again (Alt)
+zen-search-find-again-shortcut-alt = Find Again (Alt)
+zen-search-find-again-shortcut-prev-alt = Find Previous (Alt)
 zen-bookmark-this-page-shortcut = Bookmark This Page
 zen-bookmark-show-library-shortcut = Show Bookmarks Library
 zen-key-stop = Stop Loading
diff --git a/src/browser/components/preferences/zen-settings.js b/src/browser/components/preferences/zen-settings.js
index c048ecffa..73d5663cf 100644
--- a/src/browser/components/preferences/zen-settings.js
+++ b/src/browser/components/preferences/zen-settings.js
@@ -803,6 +803,7 @@ const zenMissingKeyboardShortcutL10n = {
 
   key_inspectorMac: "zen-key-inspector-mac",
   key_findSelection: "zen-key-find-selection",
+  key_findPrevious2: "zen-search-find-again-shortcut-prev-alt",
 
   // Devtools
   key_toggleToolbox: "zen-devtools-toggle-shortcut",
@@ -826,6 +827,9 @@ var zenIgnoreKeyboardShortcutIDs = [
   "key_exitFullScreen_old",
   "key_exitFullScreen_compat",
   "key_duplicateTab",
+  "key_addTabSplitView",
+  "key_separateTabSplitView",
+  "viewOpenTabsSidebarKb",
 ];
 
 var zenIgnoreKeyboardShortcutL10n = [
diff --git a/src/zen/kbs/ZenKeyboardShortcuts.mjs b/src/zen/kbs/ZenKeyboardShortcuts.mjs
index c78f9993b..620e87a6d 100644
--- a/src/zen/kbs/ZenKeyboardShortcuts.mjs
+++ b/src/zen/kbs/ZenKeyboardShortcuts.mjs
@@ -85,9 +85,10 @@ const defaultKeyboardGroups = {
     "zen-search-focus-shortcut",
     "zen-search-focus-shortcut-alt",
     "zen-find-shortcut",
-    "zen-search-find-again-shortcut-2",
     "zen-search-find-again-shortcut",
+    "zen-search-find-again-shortcut-alt",
     "zen-search-find-again-shortcut-prev",
+    "zen-search-find-again-shortcut-prev-alt",
   ],
   pageOperations: [
     "zen-text-action-copy-url-markdown-shortcut",
@@ -893,7 +894,7 @@ class nsZenKeyboardShortcutsLoader {
 }
 
 class nsZenKeyboardShortcutsVersioner {
-  static LATEST_KBS_VERSION = 19;
+  static LATEST_KBS_VERSION = 20;
 
   constructor() {}
 
@@ -1301,6 +1302,24 @@ class nsZenKeyboardShortcutsVersioner {
       }
     }
 
+    if (version < 20) {
+      // Migrate from version 19 to 20.
+      // - Disable "key_addTabSplitView" and "key_separateTabSplitView"
+      // since we already had "cmd_zenNewEmptySplit" and "cmd_zenSplitViewUnsplit" before Firefox 153.
+      // - Disable firefox's "viewOpenTabsSidebarKb" as it depends on firefox's native sidebar feature
+      const shouldBeDisabledShortcuts = [
+        "key_addTabSplitView",
+        "key_separateTabSplitView",
+        "viewOpenTabsSidebarKb",
+      ];
+      for (let shortcut of data) {
+        if (shouldBeDisabledShortcuts.includes(shortcut.getID())) {
+          shortcut.shouldBeEmpty = true;
+          shortcut.setDisabled(true);
+        }
+      }
+    }
+
     return data;
   }
 }