diff --git a/client/src/components/Sidebar.tsx b/client/src/components/Sidebar.tsx
index 2ddb18d..e7d74f9 100644
--- a/client/src/components/Sidebar.tsx
+++ b/client/src/components/Sidebar.tsx
@@ -386,7 +386,6 @@ const Sidebar = ({
                         />
                       ) : typeof configItem.value === "boolean" ? (
                         <Select
-                          data-testid={`${configKey}-select`}
                           value={configItem.value.toString()}
                           onValueChange={(val) => {
                             const newConfig = { ...config };
@@ -397,12 +396,25 @@ const Sidebar = ({
                             setConfig(newConfig);
                           }}
                         >
-                          <SelectTrigger id={`${configKey}-input`}>
+                          <SelectTrigger
+                            id={`${configKey}-input`}
+                            data-testid={`${configKey}-input`}
+                          >
                             <SelectValue />
                           </SelectTrigger>
                           <SelectContent>
-                            <SelectItem value="true">True</SelectItem>
-                            <SelectItem value="false">False</SelectItem>
+                            <SelectItem
+                              data-testid={`${configKey}-input-true`}
+                              value="true"
+                            >
+                              True
+                            </SelectItem>
+                            <SelectItem
+                              data-testid={`${configKey}-input-false`}
+                              value="false"
+                            >
+                              False
+                            </SelectItem>
                           </SelectContent>
                         </Select>
                       ) : (
diff --git a/client/src/components/__tests__/Sidebar.test.tsx b/client/src/components/__tests__/Sidebar.test.tsx
index 8e72b00..fad066f 100644
--- a/client/src/components/__tests__/Sidebar.test.tsx
+++ b/client/src/components/__tests__/Sidebar.test.tsx
@@ -423,6 +423,33 @@ describe("Sidebar Environment Variables", () => {
       );
     });
 
+    it("should update auto browser open disabled", () => {
+      const setConfig = jest.fn();
+      renderSidebar({ config: DEFAULT_INSPECTOR_CONFIG, setConfig });
+
+      openConfigSection();
+
+      const autoOpenDisabledInput = screen.getByTestId(
+        "MCP_AUTO_OPEN_DISABLED-input",
+      );
+      fireEvent.click(autoOpenDisabledInput);
+      const trueOption = screen.getByTestId(
+        "MCP_AUTO_OPEN_DISABLED-input-true",
+      );
+      fireEvent.click(trueOption);
+
+      expect(setConfig).toHaveBeenCalledWith(
+        expect.objectContaining({
+          MCP_AUTO_OPEN_DISABLED: {
+            label: "Auto Browser Open Disabled",
+            description:
+              "Disable automatic browser opening when inspector starts",
+            value: true,
+          },
+        }),
+      );
+    });
+
     it("should maintain configuration state after multiple updates", () => {
       const setConfig = jest.fn();
       const { rerender } = renderSidebar({
diff --git a/client/src/lib/configurationTypes.ts b/client/src/lib/configurationTypes.ts
index 7c74bb7..1b9736f 100644
--- a/client/src/lib/configurationTypes.ts
+++ b/client/src/lib/configurationTypes.ts
@@ -33,4 +33,9 @@ export type InspectorConfig = {
    * The full address of the MCP Proxy Server, in case it is running on a non-default address. Example: http://10.1.1.22:5577
    */
   MCP_PROXY_FULL_ADDRESS: ConfigItem;
+
+  /**
+   * Disable automatic browser opening when inspector starts.
+   */
+  MCP_AUTO_OPEN_DISABLED: ConfigItem;
 };
diff --git a/client/src/lib/constants.ts b/client/src/lib/constants.ts
index e7fa14c..cbfab90 100644
--- a/client/src/lib/constants.ts
+++ b/client/src/lib/constants.ts
@@ -43,4 +43,9 @@ export const DEFAULT_INSPECTOR_CONFIG: InspectorConfig = {
       "Set this if you are running the MCP Inspector Proxy on a non-default address. Example: http://10.1.1.22:5577",
     value: "",
   },
+  MCP_AUTO_OPEN_DISABLED: {
+    label: "Auto Browser Open Disabled",
+    description: "Disable automatic browser opening when inspector starts",
+    value: false,
+  },
 } as const;