diff --git a/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/chrome.css b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/chrome.css
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+++ b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/chrome.css
@@ -0,0 +1,14 @@
+
+/* hide Sidebery header */
+@media (-moz-bool-pref: "theme.hidesidebar.hide_sidebar_header") {
+  #sidebar-header {
+    display: none !important;
+  }
+}
+
+/* hide default sidebar */
+@media (-moz-bool-pref: "theme.hidesidebar.hide_navigator_toolbox") {
+  #navigator-toolbox {
+    display: none !important;
+  }
+}
diff --git a/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/image.png b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/image.png
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diff --git a/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/preferences.json b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/preferences.json
new file mode 100644
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--- /dev/null
+++ b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/preferences.json
@@ -0,0 +1,14 @@
+[
+    {
+        "property": "theme.hidesidebar.hide_sidebar_header",
+        "label": "hide Sidebery header",
+        "type": "checkbox",
+        "defaultValue": false
+    },
+    {
+        "property": "theme.hidesidebar.hide_navigator_toolbox",
+        "label": "hide default sidebar",
+        "type": "checkbox",
+        "defaultValue": false
+    }
+]
\ No newline at end of file
diff --git a/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/readme.md b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/readme.md
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--- /dev/null
+++ b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/readme.md
@@ -0,0 +1,25 @@
+
+# Hide Sidebar
+
+> Conceal the sidebar and Sidebery title bar.
+
+1.  Install the `Sidebery` add-on.
+2.  Right-click on the sidebar and select `Compact mode -> Hide sidebar -> Enable compact mode`.
+3.  Activate the mode configuration.
+
+Tips:
+
+1.  Add `user.js` to your `Profiles` directory to enable `Browser Toolbox Mode`.
+
+// user.js
+
+user_pref("devtools.chrome.enabled", true);
+    user_pref("devtools.debugger.remote-enabled", true);
+
+user_pref("xpinstall.signatures.required", false);
+    user_pref("config.trim_on_minimize", true);
+
+2.  `Browser Toolbox Mode` is located under `Tools -> Browser Tools`.
+3.  For quick style previews, utilize the `Style Editor`.
+4.  Customize navigation and sidebar colors via `about:config -> zen.theme.gradient.show-custom-colors -> true`.
+5.  Disable transparent backgrounds: `about:config -> transparent -> false`.
diff --git a/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/theme.json b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/theme.json
new file mode 100644
index 00000000..3f0a687a
--- /dev/null
+++ b/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/theme.json
@@ -0,0 +1,15 @@
+{
+    "id": "9aff64ba-d353-4709-b6a7-30a9f5139403",
+    "name": "Hide Sidebar",
+    "description": "Hide default sidebar for using Sidebery",
+    "homepage": "https://git.081024.xyz/hxx/zen-mods",
+    "style": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/chrome.css",
+    "readme": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/readme.md",
+    "image": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/image.png",
+    "author": "jqtmviyu",
+    "version": "1.0.0",
+    "tags": [],
+    "createdAt": "2025-05-25",
+    "updatedAt": "2025-05-25",
+    "preferences": "https://raw.githubusercontent.com/zen-browser/theme-store/main/themes/9aff64ba-d353-4709-b6a7-30a9f5139403/preferences.json"
+}
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