diff --git a/src/devtool/jsx/controllers.jsx b/src/devtool/jsx/controllers.jsx
index a8cd29f..d9f5e04 100644
--- a/src/devtool/jsx/controllers.jsx
+++ b/src/devtool/jsx/controllers.jsx
@@ -235,6 +235,7 @@ export default function ControllerPanel({ deviceKey }) {
 											'.png'
 										}
 										className="control-icon"
+										decoding="async"
 									/>
 									<span className="control-label">{controlName}</span>
 								</div>
diff --git a/src/devtool/jsx/hands.jsx b/src/devtool/jsx/hands.jsx
index 7e8ec3b..ce7de17 100644
--- a/src/devtool/jsx/hands.jsx
+++ b/src/devtool/jsx/hands.jsx
@@ -46,6 +46,7 @@ export default function HandPanel({ deviceKey }) {
 						<img
 							src={`./assets/images/${strings.name}.png`}
 							className="control-icon"
+							decoding="async"
 						/>
 						<span className="control-label">{strings.displayName}</span>
 					</div>
@@ -82,7 +83,7 @@ export default function HandPanel({ deviceKey }) {
 										className="btn special-button"
 										onClick={onPressAnalog}
 									>
-										<img src="./assets/images/hand-pose.png" />
+										<img src="./assets/images/hand-pose.png" decoding="async" />
 									</button>
 									<input
 										ref={rangeRef}
diff --git a/src/devtool/jsx/headset.jsx b/src/devtool/jsx/headset.jsx
index a97e472..0168389 100644
--- a/src/devtool/jsx/headset.jsx
+++ b/src/devtool/jsx/headset.jsx
@@ -114,6 +114,7 @@ export default function HeadsetBar({ device }) {
 								<img
 									src="./assets/images/polyfill-on.png"
 									className="action-icon"
+									decoding="async"
 								/>
 								Polyfill
 							</button>
@@ -141,7 +142,7 @@ export default function HeadsetBar({ device }) {
 									(showDropDown ? ' button-pressed' : '')
 								}
 								onClick={() => {
-									setShowDropDown(!showDropDown);
+									setShowDropDown((prevShowDropDown) => !prevShowDropDown);
 								}}
 							>
 								<img
diff --git a/src/devtool/jsx/inspector.jsx b/src/devtool/jsx/inspector.jsx
index b998155..e58a549 100644
--- a/src/devtool/jsx/inspector.jsx
+++ b/src/devtool/jsx/inspector.jsx
@@ -17,6 +17,12 @@ import { EmulatorSettings } from '../js/emulatorStates';
 import React from 'react';
 import { changeRoomDimension } from '../js/messenger';
 
+
+function fixNumber(rawValue) {
+	const value = Number(rawValue);
+	return (value >= 0 ? '\xa0' : '') + value.toFixed(2);
+}
+
 export default function Inspector({ device, inputMode }) {
 	const sceneContainerRef = React.useRef();
 	const meshWidthRef = React.useRef();
@@ -35,10 +41,6 @@ export default function Inspector({ device, inputMode }) {
 		});
 	});
 
-	function fixNumber(rawValue) {
-		const value = Number(rawValue);
-		return (value >= 0 ? '\xa0' : '') + value.toFixed(2);
-	}
 
 	React.useEffect(() => {
 		sceneContainerRef.current.appendChild(device.canvas);
@@ -58,7 +60,7 @@ export default function Inspector({ device, inputMode }) {
 			<div id="transform-component">
 				<button
 					onClick={() => {
-						setShowTransforms(!showTransforms);
+						setShowTransforms((prevShowTransforms) => !prevShowTransforms);
 						setShowRoomSettings(false);
 						setShowMeshSettings(false);
 					}}
@@ -68,7 +70,7 @@ export default function Inspector({ device, inputMode }) {
 				</button>
 				<button
 					onClick={() => {
-						setShowRoomSettings(!showRoomSettings);
+						setShowRoomSettings((prevShowRoomSettings) => !prevShowRoomSettings);
 						setShowTransforms(false);
 						setShowMeshSettings(false);
 					}}
@@ -78,7 +80,7 @@ export default function Inspector({ device, inputMode }) {
 				</button>
 				<button
 					onClick={() => {
-						setShowMeshSettings(!showMeshSettings);
+						setShowMeshSettings((prevShowMeshSettings) => !prevShowMeshSettings);
 						setShowRoomSettings(false);
 						setShowTransforms(false);
 					}}
@@ -101,6 +103,7 @@ export default function Inspector({ device, inputMode }) {
 												: CONTROLLER_STRINGS[deviceKey].name
 										}.png`}
 										className="control-icon"
+										decoding="async"
 									/>
 								</div>
 								<div className="col-10 transform-body">
@@ -144,6 +147,7 @@ export default function Inspector({ device, inputMode }) {
 							<img
 								src="./assets/images/roomscale.png"
 								className="control-icon"
+								decoding="async"
 							/>
 						</div>
 						<div className="col-10 transform-body">