diff --git a/res/browser_api_test.html b/res/browser_api_test.html
deleted file mode 100644
index fbb3d85..0000000
--- a/res/browser_api_test.html
+++ /dev/null
@@ -1,90 +0,0 @@
-<!doctype html>
-<html lang="en">
-    <head>
-        <meta charset="UTF-8" />
-        <title>OBS Browser API Check</title>
-        <style>
-            body {
-                background: #111;
-                color: #eee;
-                font-family: monospace;
-                padding: 16px;
-            }
-            h1 {
-                color: #6cf;
-            }
-            .fail {
-                color: #f66;
-            }
-            .ok {
-                color: #6f6;
-            }
-            pre {
-                white-space: pre-wrap;
-            }
-        </style>
-    </head>
-    <body>
-        <h1>OBS Browser Source – Missing API Report</h1>
-        <pre id="log"></pre>
-
-        <script>
-            const logEl = document.getElementById("log");
-
-            function log(line, cls = "") {
-                const span = document.createElement("div");
-                if (cls) span.className = cls;
-                span.textContent = line;
-                logEl.appendChild(span);
-            }
-
-            const apiChecks = {
-                "window.chrome": () => window.chrome,
-                "navigator.mediaDevices": () => navigator.mediaDevices,
-                "navigator.mediaDevices.getUserMedia": () => navigator.mediaDevices?.getUserMedia,
-                RTCPeerConnection: () => window.RTCPeerConnection,
-                WebSocket: () => window.WebSocket,
-                Notification: () => window.Notification,
-                PaymentRequest: () => window.PaymentRequest,
-                SharedArrayBuffer: () => SharedArrayBuffer,
-                ServiceWorker: () => navigator.serviceWorker,
-                "Clipboard API": () => navigator.clipboard,
-                WebGL2: () => {
-                    const c = document.createElement("canvas");
-                    return c.getContext("webgl2");
-                },
-                AudioWorklet: () => window.AudioWorklet,
-                "Gamepad API": () => navigator.getGamepads,
-                "Screen Orientation API": () => screen.orientation,
-                "Permissions API": () => navigator.permissions,
-                "File System Access API": () => window.showOpenFilePicker,
-                "WebRTC DataChannel": () => window.RTCPeerConnection && RTCPeerConnection.prototype.createDataChannel,
-                IndexedDB: () => window.indexedDB,
-                BroadcastChannel: () => window.BroadcastChannel,
-                "Web MIDI": () => navigator.requestMIDIAccess,
-            };
-
-            log("Running API availability check...\n");
-
-            let missing = 0;
-
-            for (const [name, test] of Object.entries(apiChecks)) {
-                let result;
-                try {
-                    result = test();
-                } catch (e) {
-                    result = undefined;
-                }
-
-                if (result === undefined || result === null) {
-                    log(`${name} → undefined / unavailable`, "fail");
-                    missing++;
-                } else {
-                    log(`${name} → OK`, "ok");
-                }
-            }
-
-            log(`\nSummary: ${missing} APIs missing or unavailable.`);
-        </script>
-    </body>
-</html>
diff --git a/src/css/index.css b/src/css/index.css
index e445bd3..a64d8c8 100644
--- a/src/css/index.css
+++ b/src/css/index.css
@@ -5,6 +5,7 @@
 
 :root {
     --window-frame-height: 36px;
+    --window-control-size: 28px;
 }
 
 p {
@@ -64,15 +65,17 @@ body {
 }
 
 .window-control {
-    width: 30px;
-    height: 24px;
+    width: var(--window-control-size);
+    height: var(--window-control-size);
     padding: 0;
     border-radius: 6px;
     background: rgba(148, 163, 184, 0.2);
     border: 1px solid rgba(148, 163, 184, 0.25);
     color: #e2e8f0;
-    font-size: 16px;
+    font-size: 14px;
     line-height: 1;
+    display: grid;
+    place-items: center;
     box-shadow: none;
 }
 
diff --git a/src/index.html b/src/index.html
index 3f48019..a915866 100644
--- a/src/index.html
+++ b/src/index.html
@@ -12,6 +12,9 @@
                 <button class="window-control" type="button" data-window-action="minimize" aria-label="Minimize">
                     &minus;
                 </button>
+                <button class="window-control" type="button" data-window-action="devtools" aria-label="Toggle dev tools">
+                    &#9881;
+                </button>
                 <button
                     class="window-control window-control-close"
                     type="button"
@@ -113,6 +116,9 @@
                     if (action === "minimize") {
                         window.store.minimizeWindow();
                     }
+                    if (action === "devtools") {
+                        window.store.toggleDevTools();
+                    }
                     if (action === "close") {
                         window.store.closeWindow();
                     }
diff --git a/src/main.js b/src/main.js
index 1b14ae1..e5a89c0 100644
--- a/src/main.js
+++ b/src/main.js
@@ -70,6 +70,16 @@ ipcMain.handle("close-window", () => {
     }
 });
 
+ipcMain.handle("toggle-devtools", () => {
+    if (ELECTRON_WINDOW && !ELECTRON_WINDOW.isDestroyed()) {
+        if (ELECTRON_WINDOW.webContents.isDevToolsOpened()) {
+            ELECTRON_WINDOW.webContents.closeDevTools();
+        } else {
+            ELECTRON_WINDOW.webContents.openDevTools({ mode: "detach" });
+        }
+    }
+});
+
 ipcMain.handle("save-broadcaster", (_, broadcaster) => {
     const store = readStore(STORE_PATH);
     store.lastBroadcaster = broadcaster;
diff --git a/src/preload.js b/src/preload.js
index 1488e30..1e568d5 100644
--- a/src/preload.js
+++ b/src/preload.js
@@ -9,4 +9,5 @@ contextBridge.exposeInMainWorld("store", {
     setWindowSize: (width, height) => ipcRenderer.invoke("set-window-size", width, height),
     minimizeWindow: () => ipcRenderer.invoke("minimize-window"),
     closeWindow: () => ipcRenderer.invoke("close-window"),
+    toggleDevTools: () => ipcRenderer.invoke("toggle-devtools"),
 });
