4 files changed, 32 insertions, 12 deletions

diff --git a/platform/web/js/engine/config.js b/platform/web/js/engine/config.js
index 0b6626968e..a7134da6fa 100644
--- a/platform/web/js/engine/config.js
+++ b/platform/web/js/engine/config.js
@@ -19,7 +19,7 @@ const EngineConfig = {}; // eslint-disable-line no-unused-vars
 const InternalConfig = function (initConfig) { // eslint-disable-line no-unused-vars
 	const cfg = /** @lends {InternalConfig.prototype} */ {
 		/**
-		 * Whether the unload the engine automatically after the instance is initialized.
+		 * Whether to unload the engine automatically after the instance is initialized.
 		 *
 		 * @memberof EngineConfig
 		 * @default
diff --git a/platform/web/js/engine/engine.js b/platform/web/js/engine/engine.js
index 3d6720a2fc..7e24ad9ae2 100644
--- a/platform/web/js/engine/engine.js
+++ b/platform/web/js/engine/engine.js
@@ -179,9 +179,7 @@ const Engine = (function () {
 							preloader.preloadedFiles.length = 0; // Clear memory
 							me.rtenv['callMain'](me.config.args);
 							initPromise = null;
-							if (me.config.serviceWorker && 'serviceWorker' in navigator) {
-								navigator.serviceWorker.register(me.config.serviceWorker);
-							}
+							me.installServiceWorker();
 							resolve();
 						});
 					});
@@ -242,6 +240,17 @@ const Engine = (function () {
 					this.rtenv['request_quit']();
 				}
 			},
+
+			/**
+			 * Install the progressive-web app service worker.
+			 * @returns {Promise} The service worker registration promise.
+			 */
+			installServiceWorker: function () {
+				if (this.config.serviceWorker && 'serviceWorker' in navigator) {
+					return navigator.serviceWorker.register(this.config.serviceWorker);
+				}
+				return Promise.resolve();
+			},
 		};
 
 		Engine.prototype = proto;
@@ -252,6 +261,7 @@ const Engine = (function () {
 		Engine.prototype['startGame'] = Engine.prototype.startGame;
 		Engine.prototype['copyToFS'] = Engine.prototype.copyToFS;
 		Engine.prototype['requestQuit'] = Engine.prototype.requestQuit;
+		Engine.prototype['installServiceWorker'] = Engine.prototype.installServiceWorker;
 		// Also expose static methods as instance methods
 		Engine.prototype['load'] = Engine.load;
 		Engine.prototype['unload'] = Engine.unload;
diff --git a/platform/web/js/engine/features.js b/platform/web/js/engine/features.js
index b7c6c9d445..81bc82f3c6 100644
--- a/platform/web/js/engine/features.js
+++ b/platform/web/js/engine/features.js
@@ -72,8 +72,14 @@ const Features = { // eslint-disable-line no-unused-vars
 	 *
 	 * @returns {Array<string>} A list of human-readable missing features.
 	 * @function Engine.getMissingFeatures
+	 * @typedef {{ threads: boolean }} SupportedFeatures
+	 * @param {SupportedFeatures} supportedFeatures
 	 */
-	getMissingFeatures: function () {
+	getMissingFeatures: function (supportedFeatures = {}) {
+		const {
+			threads: supportsThreads = true,
+		} = supportedFeatures;
+
 		const missing = [];
 		if (!Features.isWebGLAvailable(2)) {
 			missing.push('WebGL2 - Check web browser configuration and hardware support');
@@ -84,12 +90,16 @@ const Features = { // eslint-disable-line no-unused-vars
 		if (!Features.isSecureContext()) {
 			missing.push('Secure Context - Check web server configuration (use HTTPS)');
 		}
-		if (!Features.isCrossOriginIsolated()) {
-			missing.push('Cross Origin Isolation - Check web server configuration (send correct headers)');
-		}
-		if (!Features.isSharedArrayBufferAvailable()) {
-			missing.push('SharedArrayBuffer - Check web server configuration (send correct headers)');
+
+		if (supportsThreads) {
+			if (!Features.isCrossOriginIsolated()) {
+				missing.push('Cross-Origin Isolation - Check that the web server configuration sends the correct headers.');
+			}
+			if (!Features.isSharedArrayBufferAvailable()) {
+				missing.push('SharedArrayBuffer - Check that the web server configuration sends the correct headers.');
+			}
 		}
+
 		// Audio is normally optional since we have a dummy fallback.
 		return missing;
 	},
diff --git a/platform/web/js/libs/audio.worklet.js b/platform/web/js/libs/audio.worklet.js
index 89b581b3d6..3b94cab85c 100644
--- a/platform/web/js/libs/audio.worklet.js
+++ b/platform/web/js/libs/audio.worklet.js
@@ -167,7 +167,7 @@ class GodotProcessor extends AudioWorkletProcessor {
 				GodotProcessor.write_input(this.input_buffer, input);
 				this.input.write(this.input_buffer);
 			} else {
-				this.port.postMessage('Input buffer is full! Skipping input frame.');
+				// this.port.postMessage('Input buffer is full! Skipping input frame.'); // Uncomment this line to debug input buffer.
 			}
 		}
 		const process_output = GodotProcessor.array_has_data(outputs);
@@ -184,7 +184,7 @@ class GodotProcessor extends AudioWorkletProcessor {
 					this.port.postMessage({ 'cmd': 'read', 'data': chunk });
 				}
 			} else {
-				this.port.postMessage('Output buffer has not enough frames! Skipping output frame.');
+				// this.port.postMessage('Output buffer has not enough frames! Skipping output frame.'); // Uncomment this line to debug output buffer.
 			}
 		}
 		this.process_notify();