17 files changed, 1099 insertions, 351 deletions

diff --git a/platform/android/export/export.cpp b/platform/android/export/export.cpp
index 088bb35f62..326e513261 100644
--- a/platform/android/export/export.cpp
+++ b/platform/android/export/export.cpp
@@ -806,8 +806,7 @@ class EditorExportPlatformAndroid : public EditorExportPlatform {
 
 		manifest_text += _get_xr_features_tag(p_preset);
 		manifest_text += _get_instrumentation_tag(p_preset);
-		String plugins_names = get_plugins_names(get_enabled_plugins(p_preset));
-		manifest_text += _get_application_tag(p_preset, plugins_names);
+		manifest_text += _get_application_tag(p_preset);
 		manifest_text += "</manifest>\n";
 		String manifest_path = vformat("res://android/build/src/%s/AndroidManifest.xml", (p_debug ? "debug" : "release"));
 
@@ -856,8 +855,6 @@ class EditorExportPlatformAndroid : public EditorExportPlatform {
 		int xr_mode_index = p_preset->get("xr_features/xr_mode");
 		bool focus_awareness = p_preset->get("xr_features/focus_awareness");
 
-		String plugins_names = get_plugins_names(get_enabled_plugins(p_preset));
-
 		Vector<String> perms;
 		// Write permissions into the perms variable.
 		_get_permissions(p_preset, p_give_internet, perms);
@@ -995,11 +992,6 @@ class EditorExportPlatformAndroid : public EditorExportPlatform {
 							encode_uint32(xr_mode_index == /* XRMode.OVR */ 1 && focus_awareness ? 0xFFFFFFFF : 0, &p_manifest.write[iofs + 16]);
 						}
 
-						if (tname == "meta-data" && attrname == "value" && value == "plugins_value" && !plugins_names.is_empty()) {
-							// Update the meta-data 'android:value' attribute with the list of enabled plugins.
-							string_table.write[attr_value] = plugins_names;
-						}
-
 						is_focus_aware_metadata = tname == "meta-data" && attrname == "name" && value == "com.oculus.vr.focusaware";
 						iofs += 20;
 					}
@@ -2003,6 +1995,7 @@ public:
 			String template_err;
 			bool dvalid = false;
 			bool rvalid = false;
+			bool has_export_templates = false;
 
 			if (p_preset->get("custom_template/debug") != "") {
 				dvalid = FileAccess::exists(p_preset->get("custom_template/debug"));
@@ -2010,7 +2003,7 @@ public:
 					template_err += TTR("Custom debug template not found.") + "\n";
 				}
 			} else {
-				dvalid = exists_export_template("android_debug.apk", &template_err);
+				has_export_templates |= exists_export_template("android_debug.apk", &template_err);
 			}
 
 			if (p_preset->get("custom_template/release") != "") {
@@ -2019,22 +2012,24 @@ public:
 					template_err += TTR("Custom release template not found.") + "\n";
 				}
 			} else {
-				rvalid = exists_export_template("android_release.apk", &template_err);
+				has_export_templates |= exists_export_template("android_release.apk", &template_err);
 			}
 
-			valid = dvalid || rvalid;
+			r_missing_templates = !has_export_templates;
+			valid = dvalid || rvalid || has_export_templates;
 			if (!valid) {
 				err += template_err;
 			}
 		} else {
-			valid = exists_export_template("android_source.zip", &err);
+			r_missing_templates = !exists_export_template("android_source.zip", &err);
 
-			if (!FileAccess::exists("res://android/build/build.gradle")) {
+			bool installed_android_build_template = FileAccess::exists("res://android/build/build.gradle");
+			if (!installed_android_build_template) {
 				err += TTR("Android build template not installed in the project. Install it from the Project menu.") + "\n";
-				valid = false;
 			}
+
+			valid = installed_android_build_template && !r_missing_templates;
 		}
-		r_missing_templates = !valid;
 
 		// Validate the rest of the configuration.
 
diff --git a/platform/android/export/gradle_export_util.h b/platform/android/export/gradle_export_util.h
index ce6a3c96db..097a2391ee 100644
--- a/platform/android/export/gradle_export_util.h
+++ b/platform/android/export/gradle_export_util.h
@@ -269,14 +269,6 @@ String _get_instrumentation_tag(const Ref<EditorExportPreset> &p_preset) {
 	return manifest_instrumentation_text;
 }
 
-String _get_plugins_tag(const String &plugins_names) {
-	if (!plugins_names.is_empty()) {
-		return vformat("    <meta-data tools:node=\"replace\" android:name=\"plugins\" android:value=\"%s\" />\n", plugins_names);
-	} else {
-		return "    <meta-data tools:node=\"remove\" android:name=\"plugins\" />\n";
-	}
-}
-
 String _get_activity_tag(const Ref<EditorExportPreset> &p_preset) {
 	bool uses_xr = (int)(p_preset->get("xr_features/xr_mode")) == 1;
 	String orientation = _get_android_orientation_label(_get_screen_orientation());
@@ -295,7 +287,7 @@ String _get_activity_tag(const Ref<EditorExportPreset> &p_preset) {
 	return manifest_activity_text;
 }
 
-String _get_application_tag(const Ref<EditorExportPreset> &p_preset, const String &plugins_names) {
+String _get_application_tag(const Ref<EditorExportPreset> &p_preset) {
 	bool uses_xr = (int)(p_preset->get("xr_features/xr_mode")) == 1;
 	String manifest_application_text =
 			"    <application android:label=\"@string/godot_project_name_string\"\n"
@@ -303,7 +295,6 @@ String _get_application_tag(const Ref<EditorExportPreset> &p_preset, const Strin
 			"        android:icon=\"@mipmap/icon\">\n\n"
 			"        <meta-data tools:node=\"remove\" android:name=\"xr_mode_metadata_name\" />\n";
 
-	manifest_application_text += _get_plugins_tag(plugins_names);
 	if (uses_xr) {
 		manifest_application_text += "        <meta-data tools:node=\"replace\" android:name=\"com.samsung.android.vr.application.mode\" android:value=\"vr_only\" />\n";
 	}
diff --git a/platform/android/java/app/AndroidManifest.xml b/platform/android/java/app/AndroidManifest.xml
index cd2f1d367e..948fa8c00b 100644
--- a/platform/android/java/app/AndroidManifest.xml
+++ b/platform/android/java/app/AndroidManifest.xml
@@ -35,11 +35,6 @@
             android:name="xr_mode_metadata_name"
             android:value="xr_mode_metadata_value" />
 
-        <!-- Metadata populated at export time and used by Godot to figure out which plugins must be enabled. -->
-        <meta-data
-            android:name="plugins"
-            android:value="plugins_value"/>
-
         <activity
             android:name=".GodotApp"
             android:label="@string/godot_project_name_string"
diff --git a/platform/android/java/app/config.gradle b/platform/android/java/app/config.gradle
index 06d1f4064e..585e517631 100644
--- a/platform/android/java/app/config.gradle
+++ b/platform/android/java/app/config.gradle
@@ -99,7 +99,7 @@ ext.getGodotLibraryVersion = { ->
     return libraryVersion
 }
 
-final String PLUGIN_VALUE_SEPARATOR_REGEX = "\\|"
+final String VALUE_SEPARATOR_REGEX = "\\|"
 
 // get the list of ABIs the project should be exported to
 ext.getExportEnabledABIs = { ->
@@ -108,7 +108,7 @@ ext.getExportEnabledABIs = { ->
         enabledABIs = "armeabi-v7a|arm64-v8a|x86|x86_64|"
     }
     Set<String> exportAbiFilter = [];
-    for (String abi_name : enabledABIs.split(PLUGIN_VALUE_SEPARATOR_REGEX)) {
+    for (String abi_name : enabledABIs.split(VALUE_SEPARATOR_REGEX)) {
         if (!abi_name.trim().isEmpty()){
             exportAbiFilter.add(abi_name);
         }
@@ -143,7 +143,7 @@ ext.getGodotPluginsMavenRepos = { ->
     if (project.hasProperty("plugins_maven_repos")) {
         String mavenReposProperty = project.property("plugins_maven_repos")
         if (mavenReposProperty != null && !mavenReposProperty.trim().isEmpty()) {
-            for (String mavenRepoUrl : mavenReposProperty.split(PLUGIN_VALUE_SEPARATOR_REGEX)) {
+            for (String mavenRepoUrl : mavenReposProperty.split(VALUE_SEPARATOR_REGEX)) {
                 mavenRepos += mavenRepoUrl.trim()
             }
         }
@@ -163,7 +163,7 @@ ext.getGodotPluginsRemoteBinaries = { ->
     if (project.hasProperty("plugins_remote_binaries")) {
         String remoteDepsList = project.property("plugins_remote_binaries")
         if (remoteDepsList != null && !remoteDepsList.trim().isEmpty()) {
-            for (String dep: remoteDepsList.split(PLUGIN_VALUE_SEPARATOR_REGEX)) {
+            for (String dep: remoteDepsList.split(VALUE_SEPARATOR_REGEX)) {
                 remoteDeps += dep.trim()
             }
         }
@@ -182,7 +182,7 @@ ext.getGodotPluginsLocalBinaries = { ->
     if (project.hasProperty("plugins_local_binaries")) {
         String pluginsList = project.property("plugins_local_binaries")
         if (pluginsList != null && !pluginsList.trim().isEmpty()) {
-            for (String plugin : pluginsList.split(PLUGIN_VALUE_SEPARATOR_REGEX)) {
+            for (String plugin : pluginsList.split(VALUE_SEPARATOR_REGEX)) {
                 binDeps += plugin.trim()
             }
         }
diff --git a/platform/android/java/lib/src/org/godotengine/godot/plugin/GodotPluginRegistry.java b/platform/android/java/lib/src/org/godotengine/godot/plugin/GodotPluginRegistry.java
index 99811f72ed..5b41205253 100644
--- a/platform/android/java/lib/src/org/godotengine/godot/plugin/GodotPluginRegistry.java
+++ b/platform/android/java/lib/src/org/godotengine/godot/plugin/GodotPluginRegistry.java
@@ -44,8 +44,6 @@ import androidx.annotation.Nullable;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 import java.util.Collection;
-import java.util.HashSet;
-import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
 /**
@@ -56,13 +54,6 @@ public final class GodotPluginRegistry {
 
 	private static final String GODOT_PLUGIN_V1_NAME_PREFIX = "org.godotengine.plugin.v1.";
 
-	/**
-	 * Name for the metadata containing the list of Godot plugins to enable.
-	 */
-	private static final String GODOT_ENABLED_PLUGINS_LABEL = "plugins";
-
-	private static final String PLUGIN_VALUE_SEPARATOR_REGEX = "\\|";
-
 	private static GodotPluginRegistry instance;
 	private final ConcurrentHashMap<String, GodotPlugin> registry;
 
@@ -132,37 +123,11 @@ public final class GodotPluginRegistry {
 				return;
 			}
 
-			// When using the Godot editor for building and exporting the apk, this is used to check
-			// which plugins to enable.
-			// When using a custom process to generate the apk, the metadata is not needed since
-			// it's assumed that the developer is aware of the dependencies included in the apk.
-			final Set<String> enabledPluginsSet;
-			if (metaData.containsKey(GODOT_ENABLED_PLUGINS_LABEL)) {
-				String enabledPlugins = metaData.getString(GODOT_ENABLED_PLUGINS_LABEL, "");
-				String[] enabledPluginsList = enabledPlugins.split(PLUGIN_VALUE_SEPARATOR_REGEX);
-				if (enabledPluginsList.length == 0) {
-					// No plugins to enable. Aborting early.
-					return;
-				}
-
-				enabledPluginsSet = new HashSet<>();
-				for (String enabledPlugin : enabledPluginsList) {
-					enabledPluginsSet.add(enabledPlugin.trim());
-				}
-			} else {
-				enabledPluginsSet = null;
-			}
-
 			int godotPluginV1NamePrefixLength = GODOT_PLUGIN_V1_NAME_PREFIX.length();
 			for (String metaDataName : metaData.keySet()) {
 				// Parse the meta-data looking for entry with the Godot plugin name prefix.
 				if (metaDataName.startsWith(GODOT_PLUGIN_V1_NAME_PREFIX)) {
 					String pluginName = metaDataName.substring(godotPluginV1NamePrefixLength).trim();
-					if (enabledPluginsSet != null && !enabledPluginsSet.contains(pluginName)) {
-						Log.w(TAG, "Plugin " + pluginName + " is listed in the dependencies but is not enabled.");
-						continue;
-					}
-
 					Log.i(TAG, "Initializing Godot plugin " + pluginName);
 
 					// Retrieve the plugin class full name.
@@ -177,8 +142,7 @@ public final class GodotPluginRegistry {
 																				 .getConstructor(Godot.class);
 							GodotPlugin pluginHandle = pluginConstructor.newInstance(godot);
 
-							// Load the plugin initializer into the registry using the plugin name
-							// as key.
+							// Load the plugin initializer into the registry using the plugin name as key.
 							if (!pluginName.equals(pluginHandle.getPluginName())) {
 								Log.w(TAG,
 										"Meta-data plugin name does not match the value returned by the plugin handle: " + pluginName + " =/= " + pluginHandle.getPluginName());
diff --git a/platform/javascript/.eslintrc.engine.js b/platform/javascript/.eslintrc.engine.js
index 3725cf164e..78df6d41d9 100644
--- a/platform/javascript/.eslintrc.engine.js
+++ b/platform/javascript/.eslintrc.engine.js
@@ -3,9 +3,8 @@ module.exports = {
 		"./.eslintrc.js",
 	],
 	"globals": {
-		"EngineConfig": true,
+		"InternalConfig": true,
 		"Godot": true,
 		"Preloader": true,
-		"Utils": true,
 	},
 };
diff --git a/platform/javascript/SCsub b/platform/javascript/SCsub
index ab527ef419..50b61c0db3 100644
--- a/platform/javascript/SCsub
+++ b/platform/javascript/SCsub
@@ -73,7 +73,6 @@ sys_env.Depends(build[0], sys_env["JS_EXTERNS"])
 
 engine = [
     "js/engine/preloader.js",
-    "js/engine/utils.js",
     "js/engine/config.js",
     "js/engine/engine.js",
 ]
@@ -97,7 +96,7 @@ out_files = [
 ]
 html_file = "#misc/dist/html/full-size.html"
 if env["tools"]:
-    subst_dict = {"\$GODOT_VERSION": env.GetBuildVersion()}
+    subst_dict = {"@GODOT_VERSION@": env.GetBuildVersion()}
     html_file = env.Substfile(
         target="#bin/godot${PROGSUFFIX}.html", source="#misc/dist/html/editor.html", SUBST_DICT=subst_dict
     )
diff --git a/platform/javascript/js/engine/config.js b/platform/javascript/js/engine/config.js
index 97fd718815..bba20dc360 100644
--- a/platform/javascript/js/engine/config.js
+++ b/platform/javascript/js/engine/config.js
@@ -1,100 +1,309 @@
-/** @constructor */
-function EngineConfig(opts) {
-	// Module config
-	this.unloadAfterInit = true;
-	this.onPrintError = function () {
-		console.error.apply(console, Array.from(arguments)); // eslint-disable-line no-console
-	};
-	this.onPrint = function () {
-		console.log.apply(console, Array.from(arguments)); // eslint-disable-line no-console
+/**
+ * An object used to configure the Engine instance based on godot export options, and to override those in custom HTML
+ * templates if needed.
+ *
+ * @header Engine configuration
+ * @summary The Engine configuration object. This is just a typedef, create it like a regular object, e.g.:
+ *
+ * ``const MyConfig = { executable: 'godot', unloadAfterInit: false }``
+ *
+ * @typedef {Object} EngineConfig
+ */
+const EngineConfig = {}; // eslint-disable-line no-unused-vars
+
+/**
+ * @struct
+ * @constructor
+ * @ignore
+ */
+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.
+		 *
+		 * @memberof EngineConfig
+		 * @default
+		 * @type {boolean}
+		 */
+		unloadAfterInit: true,
+		/**
+		 * The HTML DOM Canvas object to use.
+		 *
+		 * By default, the first canvas element in the document will be used is none is specified.
+		 *
+		 * @memberof EngineConfig
+		 * @default
+		 * @type {?HTMLCanvasElement}
+		 */
+		canvas: null,
+		/**
+		 * The name of the WASM file without the extension. (Set by Godot Editor export process).
+		 *
+		 * @memberof EngineConfig
+		 * @default
+		 * @type {string}
+		 */
+		executable: '',
+		/**
+		 * An alternative name for the game pck to load. The executable name is used otherwise.
+		 *
+		 * @memberof EngineConfig
+		 * @default
+		 * @type {?string}
+		 */
+		mainPack: null,
+		/**
+		 * Specify a language code to select the proper localization for the game.
+		 *
+		 * The browser locale will be used if none is specified. See complete list of
+		 * :ref:`supported locales <doc_locales>`.
+		 *
+		 * @memberof EngineConfig
+		 * @type {?string}
+		 * @default
+		 */
+		locale: null,
+		/**
+		 * The canvas resize policy determines how the canvas should be resized by Godot.
+		 *
+		 * ``0`` means Godot won't do any resizing. This is useful if you want to control the canvas size from
+		 * javascript code in your template.
+		 *
+		 * ``1`` means Godot will resize the canvas on start, and when changing window size via engine functions.
+		 *
+		 * ``2`` means Godot will adapt the canvas size to match the whole browser window.
+		 *
+		 * @memberof EngineConfig
+		 * @type {number}
+		 * @default
+		 */
+		canvasResizePolicy: 2,
+		/**
+		 * The arguments to be passed as command line arguments on startup.
+		 *
+		 * See :ref:`command line tutorial <doc_command_line_tutorial>`.
+		 *
+		 * **Note**: :js:meth:`startGame <Engine.prototype.startGame>` will always add the ``--main-pack`` argument.
+		 *
+		 * @memberof EngineConfig
+		 * @type {Array<string>}
+		 * @default
+		 */
+		args: [],
+		/**
+		 * @ignore
+		 * @type {Array.<string>}
+		 */
+		persistentPaths: ['/userfs'],
+		/**
+		 * @ignore
+		 * @type {Array.<string>}
+		 */
+		gdnativeLibs: [],
+		/**
+		 * A callback function for handling Godot's ``OS.execute`` calls.
+		 *
+		 * This is for example used in the Web Editor template to switch between project manager and editor, and for running the game.
+		 *
+		 * @callback EngineConfig.onExecute
+		 * @param {string} path The path that Godot's wants executed.
+		 * @param {Array.<string>} args The arguments of the "command" to execute.
+		 */
+		/**
+		 * @ignore
+		 * @type {?function(string, Array.<string>)}
+		 */
+		onExecute: null,
+		/**
+		 * A callback function for being notified when the Godot instance quits.
+		 *
+		 * **Note**: This function will not be called if the engine crashes or become unresponsive.
+		 *
+		 * @callback EngineConfig.onExit
+		 * @param {number} status_code The status code returned by Godot on exit.
+		 */
+		/**
+		 * @ignore
+		 * @type {?function(number)}
+		 */
+		onExit: null,
+		/**
+		 * A callback function for displaying download progress.
+		 *
+		 * The function is called once per frame while downloading files, so the usage of ``requestAnimationFrame()``
+		 * is not necessary.
+		 *
+		 * If the callback function receives a total amount of bytes as 0, this means that it is impossible to calculate.
+		 * Possible reasons include:
+		 *
+		 * -  Files are delivered with server-side chunked compression
+		 * -  Files are delivered with server-side compression on Chromium
+		 * -  Not all file downloads have started yet (usually on servers without multi-threading)
+		 *
+		 * @callback EngineConfig.onProgress
+		 * @param {number} current The current amount of downloaded bytes so far.
+		 * @param {number} total The total amount of bytes to be downloaded.
+		 */
+		/**
+		 * @ignore
+		 * @type {?function(number, number)}
+		 */
+		onProgress: null,
+		/**
+		 * A callback function for handling the standard output stream. This method should usually only be used in debug pages.
+		 *
+		 * By default, ``console.log()`` is used.
+		 *
+		 * @callback EngineConfig.onPrint
+		 * @param {...*} [var_args] A variadic number of arguments to be printed.
+		 */
+		/**
+		 * @ignore
+		 * @type {?function(...*)}
+		 */
+		onPrint: function () {
+			console.log.apply(console, Array.from(arguments)); // eslint-disable-line no-console
+		},
+		/**
+		 * A callback function for handling the standard error stream. This method should usually only be used in debug pages.
+		 *
+		 * By default, ``console.error()`` is used.
+		 *
+		 * @callback EngineConfig.onPrintError
+		 * @param {...*} [var_args] A variadic number of arguments to be printed as errors.
+		*/
+		/**
+		 * @ignore
+		 * @type {?function(...*)}
+		 */
+		onPrintError: function (var_args) {
+			console.error.apply(console, Array.from(arguments)); // eslint-disable-line no-console
+		},
 	};
-	this.onProgress = null;
 
-	// Godot Config
-	this.canvas = null;
-	this.executable = '';
-	this.mainPack = null;
-	this.locale = null;
-	this.canvasResizePolicy = false;
-	this.persistentPaths = ['/userfs'];
-	this.gdnativeLibs = [];
-	this.args = [];
-	this.onExecute = null;
-	this.onExit = null;
-	this.update(opts);
-}
+	/**
+	 * @ignore
+	 * @struct
+	 * @constructor
+	 * @param {EngineConfig} opts
+	 */
+	function Config(opts) {
+		this.update(opts);
+	}
+
+	Config.prototype = cfg;
 
-EngineConfig.prototype.update = function (opts) {
-	const config = opts || {};
-	function parse(key, def) {
-		if (typeof (config[key]) === 'undefined') {
-			return def;
+	/**
+	 * @ignore
+	 * @param {EngineConfig} opts
+	 */
+	Config.prototype.update = function (opts) {
+		const config = opts || {};
+		function parse(key, def) {
+			if (typeof (config[key]) === 'undefined') {
+				return def;
+			}
+			return config[key];
 		}
-		return config[key];
-	}
-	// Module config
-	this.unloadAfterInit = parse('unloadAfterInit', this.unloadAfterInit);
-	this.onPrintError = parse('onPrintError', this.onPrintError);
-	this.onPrint = parse('onPrint', this.onPrint);
-	this.onProgress = parse('onProgress', this.onProgress);
+		// Module config
+		this.unloadAfterInit = parse('unloadAfterInit', this.unloadAfterInit);
+		this.onPrintError = parse('onPrintError', this.onPrintError);
+		this.onPrint = parse('onPrint', this.onPrint);
+		this.onProgress = parse('onProgress', this.onProgress);
 
-	// Godot config
-	this.canvas = parse('canvas', this.canvas);
-	this.executable = parse('executable', this.executable);
-	this.mainPack = parse('mainPack', this.mainPack);
-	this.locale = parse('locale', this.locale);
-	this.canvasResizePolicy = parse('canvasResizePolicy', this.canvasResizePolicy);
-	this.persistentPaths = parse('persistentPaths', this.persistentPaths);
-	this.gdnativeLibs = parse('gdnativeLibs', this.gdnativeLibs);
-	this.args = parse('args', this.args);
-	this.onExecute = parse('onExecute', this.onExecute);
-	this.onExit = parse('onExit', this.onExit);
-};
+		// Godot config
+		this.canvas = parse('canvas', this.canvas);
+		this.executable = parse('executable', this.executable);
+		this.mainPack = parse('mainPack', this.mainPack);
+		this.locale = parse('locale', this.locale);
+		this.canvasResizePolicy = parse('canvasResizePolicy', this.canvasResizePolicy);
+		this.persistentPaths = parse('persistentPaths', this.persistentPaths);
+		this.gdnativeLibs = parse('gdnativeLibs', this.gdnativeLibs);
+		this.args = parse('args', this.args);
+		this.onExecute = parse('onExecute', this.onExecute);
+		this.onExit = parse('onExit', this.onExit);
+	};
 
-EngineConfig.prototype.getModuleConfig = function (loadPath, loadPromise) {
-	const me = this;
-	return {
-		'print': this.onPrint,
-		'printErr': this.onPrintError,
-		'locateFile': Utils.createLocateRewrite(loadPath),
-		'instantiateWasm': Utils.createInstantiatePromise(loadPromise),
-		'thisProgram': me.executable,
-		'noExitRuntime': true,
-		'dynamicLibraries': [`${me.executable}.side.wasm`],
+	/**
+	 * @ignore
+	 * @param {string} loadPath
+	 * @param {Promise} loadPromise
+	 */
+	Config.prototype.getModuleConfig = function (loadPath, loadPromise) {
+		let loader = loadPromise;
+		return {
+			'print': this.onPrint,
+			'printErr': this.onPrintError,
+			'thisProgram': this.executable,
+			'noExitRuntime': true,
+			'dynamicLibraries': [`${loadPath}.side.wasm`],
+			'instantiateWasm': function (imports, onSuccess) {
+				loader.then(function (xhr) {
+					WebAssembly.instantiate(xhr.response, imports).then(function (result) {
+						onSuccess(result['instance'], result['module']);
+					});
+				});
+				loader = null;
+				return {};
+			},
+			'locateFile': function (path) {
+				if (path.endsWith('.worker.js')) {
+					return `${loadPath}.worker.js`;
+				} else if (path.endsWith('.audio.worklet.js')) {
+					return `${loadPath}.audio.worklet.js`;
+				} else if (path.endsWith('.js')) {
+					return `${loadPath}.js`;
+				} else if (path.endsWith('.side.wasm')) {
+					return `${loadPath}.side.wasm`;
+				} else if (path.endsWith('.wasm')) {
+					return `${loadPath}.wasm`;
+				}
+				return path;
+			},
+		};
 	};
-};
 
-EngineConfig.prototype.getGodotConfig = function (cleanup) {
-	if (!(this.canvas instanceof HTMLCanvasElement)) {
-		this.canvas = Utils.findCanvas();
-		if (!this.canvas) {
-			throw new Error('No canvas found in page');
+	/**
+	 * @ignore
+	 * @param {function()} cleanup
+	 */
+	Config.prototype.getGodotConfig = function (cleanup) {
+		// Try to find a canvas
+		if (!(this.canvas instanceof HTMLCanvasElement)) {
+			const nodes = document.getElementsByTagName('canvas');
+			if (nodes.length && nodes[0] instanceof HTMLCanvasElement) {
+				this.canvas = nodes[0];
+			}
+			if (!this.canvas) {
+				throw new Error('No canvas found in page');
+			}
+		}
+		// Canvas can grab focus on click, or key events won't work.
+		if (this.canvas.tabIndex < 0) {
+			this.canvas.tabIndex = 0;
 		}
-	}
 
-	// Canvas can grab focus on click, or key events won't work.
-	if (this.canvas.tabIndex < 0) {
-		this.canvas.tabIndex = 0;
-	}
+		// Browser locale, or custom one if defined.
+		let locale = this.locale;
+		if (!locale) {
+			locale = navigator.languages ? navigator.languages[0] : navigator.language;
+			locale = locale.split('.')[0];
+		}
+		const onExit = this.onExit;
 
-	// Browser locale, or custom one if defined.
-	let locale = this.locale;
-	if (!locale) {
-		locale = navigator.languages ? navigator.languages[0] : navigator.language;
-		locale = locale.split('.')[0];
-	}
-	const onExit = this.onExit;
-	// Godot configuration.
-	return {
-		'canvas': this.canvas,
-		'canvasResizePolicy': this.canvasResizePolicy,
-		'locale': locale,
-		'onExecute': this.onExecute,
-		'onExit': function (p_code) {
-			cleanup(); // We always need to call the cleanup callback to free memory.
-			if (typeof (onExit) === 'function') {
-				onExit(p_code);
-			}
-		},
+		// Godot configuration.
+		return {
+			'canvas': this.canvas,
+			'canvasResizePolicy': this.canvasResizePolicy,
+			'locale': locale,
+			'onExecute': this.onExecute,
+			'onExit': function (p_code) {
+				cleanup(); // We always need to call the cleanup callback to free memory.
+				if (typeof (onExit) === 'function') {
+					onExit(p_code);
+				}
+			},
+		};
 	};
+	return new Config(initConfig);
 };
diff --git a/platform/javascript/js/engine/engine.js b/platform/javascript/js/engine/engine.js
index d14e0e5806..c51955ed3d 100644
--- a/platform/javascript/js/engine/engine.js
+++ b/platform/javascript/js/engine/engine.js
@@ -1,3 +1,13 @@
+/**
+ * Projects exported for the Web expose the :js:class:`Engine` class to the JavaScript environment, that allows
+ * fine control over the engine's start-up process.
+ *
+ * This API is built in an asynchronous manner and requires basic understanding
+ * of `Promises <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises>`__.
+ *
+ * @module Engine
+ * @header HTML5 shell class reference
+ */
 const Engine = (function () {
 	const preloader = new Preloader();
 
@@ -5,139 +15,254 @@ const Engine = (function () {
 	let loadPath = '';
 	let initPromise = null;
 
-	function load(basePath) {
+	/**
+	 * @classdesc The ``Engine`` class provides methods for loading and starting exported projects on the Web. For default export
+	 * settings, this is already part of the exported HTML page. To understand practical use of the ``Engine`` class,
+	 * see :ref:`Custom HTML page for Web export <doc_customizing_html5_shell>`.
+	 *
+	 * @description Create a new Engine instance with the given configuration.
+	 *
+	 * @global
+	 * @constructor
+	 * @param {EngineConfig} initConfig The initial config for this instance.
+	 */
+	function Engine(initConfig) { // eslint-disable-line no-shadow
+		this.config = new InternalConfig(initConfig);
+		this.rtenv = null;
+	}
+
+	/**
+	 * Load the engine from the specified base path.
+	 *
+	 * @param {string} basePath Base path of the engine to load.
+	 * @returns {Promise} A Promise that resolves once the engine is loaded.
+	 *
+	 * @function Engine.load
+	 */
+	Engine.load = function (basePath) {
 		if (loadPromise == null) {
 			loadPath = basePath;
 			loadPromise = preloader.loadPromise(`${loadPath}.wasm`);
 			requestAnimationFrame(preloader.animateProgress);
 		}
 		return loadPromise;
-	}
+	};
 
-	function unload() {
+	/**
+	 * Unload the engine to free memory.
+	 *
+	 * This method will be called automatically depending on the configuration. See :js:attr:`unloadAfterInit`.
+	 *
+	 * @function Engine.unload
+	 */
+	Engine.unload = function () {
 		loadPromise = null;
-	}
+	};
 
-	/** @constructor */
-	function Engine(opts) { // eslint-disable-line no-shadow
-		this.config = new EngineConfig(opts);
-		this.rtenv = null;
-	}
+	/**
+	 * Check whether WebGL is available. Optionally, specify a particular version of WebGL to check for.
+	 *
+	 * @param {number=} [majorVersion=1] The major WebGL version to check for.
+	 * @returns {boolean} If the given major version of WebGL is available.
+	 * @function Engine.isWebGLAvailable
+	 */
+	Engine.isWebGLAvailable = function (majorVersion = 1) {
+		try {
+			return !!document.createElement('canvas').getContext(['webgl', 'webgl2'][majorVersion - 1]);
+		} catch (e) { /* Not available */ }
+		return false;
+	};
 
-	Engine.prototype.init = /** @param {string=} basePath */ function (basePath) {
-		if (initPromise) {
-			return initPromise;
-		}
-		if (loadPromise == null) {
-			if (!basePath) {
-				initPromise = Promise.reject(new Error('A base path must be provided when calling `init` and the engine is not loaded.'));
-				return initPromise;
-			}
-			load(basePath);
-		}
-		preloader.setProgressFunc(this.config.onProgress);
-		let config = this.config.getModuleConfig(loadPath, loadPromise);
-		const me = this;
-		initPromise = new Promise(function (resolve, reject) {
-			Godot(config).then(function (module) {
-				module['initFS'](me.config.persistentPaths).then(function (fs_err) {
-					me.rtenv = module;
-					if (me.config.unloadAfterInit) {
-						unload();
+	/**
+	 * Safe Engine constructor, creates a new prototype for every new instance to avoid prototype pollution.
+	 * @ignore
+	 * @constructor
+	 */
+	function SafeEngine(initConfig) {
+		const proto = /** @lends Engine.prototype */ {
+			/**
+			 * Initialize the engine instance. Optionally, pass the base path to the engine to load it,
+			 * if it hasn't been loaded yet. See :js:meth:`Engine.load`.
+			 *
+			 * @param {string=} basePath Base path of the engine to load.
+			 * @return {Promise} A ``Promise`` that resolves once the engine is loaded and initialized.
+			 */
+			init: function (basePath) {
+				if (initPromise) {
+					return initPromise;
+				}
+				if (loadPromise == null) {
+					if (!basePath) {
+						initPromise = Promise.reject(new Error('A base path must be provided when calling `init` and the engine is not loaded.'));
+						return initPromise;
 					}
-					resolve();
-					config = null;
+					Engine.load(basePath);
+				}
+				preloader.setProgressFunc(this.config.onProgress);
+				let config = this.config.getModuleConfig(loadPath, loadPromise);
+				const me = this;
+				initPromise = new Promise(function (resolve, reject) {
+					Godot(config).then(function (module) {
+						module['initFS'](me.config.persistentPaths).then(function (fs_err) {
+							me.rtenv = module;
+							if (me.config.unloadAfterInit) {
+								Engine.unload();
+							}
+							resolve();
+							config = null;
+						});
+					});
 				});
-			});
-		});
-		return initPromise;
-	};
+				return initPromise;
+			},
 
-	/** @type {function(string, string):Object} */
-	Engine.prototype.preloadFile = function (file, path) {
-		return preloader.preload(file, path);
-	};
+			/**
+			 * Load a file so it is available in the instance's file system once it runs. Must be called **before** starting the
+			 * instance.
+			 *
+			 * If not provided, the ``path`` is derived from the URL of the loaded file.
+			 *
+			 * @param {string|ArrayBuffer} file The file to preload.
+			 *
+			 * If a ``string`` the file will be loaded from that path.
+			 *
+			 * If an ``ArrayBuffer`` or a view on one, the buffer will used as the content of the file.
+			 *
+			 * @param {string=} path Path by which the file will be accessible. Required, if ``file`` is not a string.
+			 *
+			 * @returns {Promise} A Promise that resolves once the file is loaded.
+			 */
+			preloadFile: function (file, path) {
+				return preloader.preload(file, path);
+			},
 
-	/** @type {function(...string):Object} */
-	Engine.prototype.start = function (override) {
-		this.config.update(override);
-		const me = this;
-		return me.init().then(function () {
-			if (!me.rtenv) {
-				return Promise.reject(new Error('The engine must be initialized before it can be started'));
-			}
-
-			let config = {};
-			try {
-				config = me.config.getGodotConfig(function () {
-					me.rtenv = null;
-				});
-			} catch (e) {
-				return Promise.reject(e);
-			}
-			// Godot configuration.
-			me.rtenv['initConfig'](config);
-
-			// Preload GDNative libraries.
-			const libs = [];
-			me.config.gdnativeLibs.forEach(function (lib) {
-				libs.push(me.rtenv['loadDynamicLibrary'](lib, { 'loadAsync': true }));
-			});
-			return Promise.all(libs).then(function () {
-				return new Promise(function (resolve, reject) {
-					preloader.preloadedFiles.forEach(function (file) {
-						me.rtenv['copyToFS'](file.path, file.buffer);
+			/**
+			 * Start the engine instance using the given override configuration (if any).
+			 * :js:meth:`startGame <Engine.prototype.startGame>` can be used in typical cases instead.
+			 *
+			 * This will initialize the instance if it is not initialized. For manual initialization, see :js:meth:`init <Engine.prototype.init>`.
+			 * The engine must be loaded beforehand.
+			 *
+			 * Fails if a canvas cannot be found on the page, or not specified in the configuration.
+			 *
+			 * @param {EngineConfig} override An optional configuration override.
+			 * @return {Promise} Promise that resolves once the engine started.
+			 */
+			start: function (override) {
+				this.config.update(override);
+				const me = this;
+				return me.init().then(function () {
+					if (!me.rtenv) {
+						return Promise.reject(new Error('The engine must be initialized before it can be started'));
+					}
+
+					let config = {};
+					try {
+						config = me.config.getGodotConfig(function () {
+							me.rtenv = null;
+						});
+					} catch (e) {
+						return Promise.reject(e);
+					}
+					// Godot configuration.
+					me.rtenv['initConfig'](config);
+
+					// Preload GDNative libraries.
+					const libs = [];
+					me.config.gdnativeLibs.forEach(function (lib) {
+						libs.push(me.rtenv['loadDynamicLibrary'](lib, { 'loadAsync': true }));
+					});
+					return Promise.all(libs).then(function () {
+						return new Promise(function (resolve, reject) {
+							preloader.preloadedFiles.forEach(function (file) {
+								me.rtenv['copyToFS'](file.path, file.buffer);
+							});
+							preloader.preloadedFiles.length = 0; // Clear memory
+							me.rtenv['callMain'](me.config.args);
+							initPromise = null;
+							resolve();
+						});
 					});
-					preloader.preloadedFiles.length = 0; // Clear memory
-					me.rtenv['callMain'](me.config.args);
-					initPromise = null;
-					resolve();
 				});
-			});
-		});
-	};
+			},
 
-	Engine.prototype.startGame = function (override) {
-		this.config.update(override);
-		// Add main-pack argument.
-		const exe = this.config.executable;
-		const pack = this.config.mainPack || `${exe}.pck`;
-		this.config.args = ['--main-pack', pack].concat(this.config.args);
-		// Start and init with execName as loadPath if not inited.
-		const me = this;
-		return Promise.all([
-			this.init(exe),
-			this.preloadFile(pack, pack),
-		]).then(function () {
-			return me.start.apply(me);
-		});
-	};
+			/**
+			 * Start the game instance using the given configuration override (if any).
+			 *
+			 * This will initialize the instance if it is not initialized. For manual initialization, see :js:meth:`init <Engine.prototype.init>`.
+			 *
+			 * This will load the engine if it is not loaded, and preload the main pck.
+			 *
+			 * This method expects the initial config (or the override) to have both the :js:attr:`executable` and :js:attr:`mainPack`
+			 * properties set (normally done by the editor during export).
+			 *
+			 * @param {EngineConfig} override An optional configuration override.
+			 * @return {Promise} Promise that resolves once the game started.
+			 */
+			startGame: function (override) {
+				this.config.update(override);
+				// Add main-pack argument.
+				const exe = this.config.executable;
+				const pack = this.config.mainPack || `${exe}.pck`;
+				this.config.args = ['--main-pack', pack].concat(this.config.args);
+				// Start and init with execName as loadPath if not inited.
+				const me = this;
+				return Promise.all([
+					this.init(exe),
+					this.preloadFile(pack, pack),
+				]).then(function () {
+					return me.start.apply(me);
+				});
+			},
 
-	Engine.prototype.copyToFS = function (path, buffer) {
-		if (this.rtenv == null) {
-			throw new Error('Engine must be inited before copying files');
-		}
-		this.rtenv['copyToFS'](path, buffer);
-	};
+			/**
+			 * Create a file at the specified ``path`` with the passed as ``buffer`` in the instance's file system.
+			 *
+			 * @param {string} path The location where the file will be created.
+			 * @param {ArrayBuffer} buffer The content of the file.
+			 */
+			copyToFS: function (path, buffer) {
+				if (this.rtenv == null) {
+					throw new Error('Engine must be inited before copying files');
+				}
+				this.rtenv['copyToFS'](path, buffer);
+			},
 
-	Engine.prototype.requestQuit = function () {
-		if (this.rtenv) {
-			this.rtenv['request_quit']();
-		}
-	};
+			/**
+			 * Request that the current instance quit.
+			 *
+			 * This is akin the user pressing the close button in the window manager, and will
+			 * have no effect if the engine has crashed, or is stuck in a loop.
+			 *
+			 */
+			requestQuit: function () {
+				if (this.rtenv) {
+					this.rtenv['request_quit']();
+				}
+			},
+		};
+
+		Engine.prototype = proto;
+		// Closure compiler exported instance methods.
+		Engine.prototype['init'] = Engine.prototype.init;
+		Engine.prototype['preloadFile'] = Engine.prototype.preloadFile;
+		Engine.prototype['start'] = Engine.prototype.start;
+		Engine.prototype['startGame'] = Engine.prototype.startGame;
+		Engine.prototype['copyToFS'] = Engine.prototype.copyToFS;
+		Engine.prototype['requestQuit'] = Engine.prototype.requestQuit;
+		// Also expose static methods as instance methods
+		Engine.prototype['load'] = Engine.load;
+		Engine.prototype['unload'] = Engine.unload;
+		Engine.prototype['isWebGLAvailable'] = Engine.isWebGLAvailable;
+		return new Engine(initConfig);
+	}
+
+	// Closure compiler exported static methods.
+	SafeEngine['load'] = Engine.load;
+	SafeEngine['unload'] = Engine.unload;
+	SafeEngine['isWebGLAvailable'] = Engine.isWebGLAvailable;
 
-	// Closure compiler exported engine methods.
-	/** @export */
-	Engine['isWebGLAvailable'] = Utils.isWebGLAvailable;
-	Engine['load'] = load;
-	Engine['unload'] = unload;
-	Engine.prototype['init'] = Engine.prototype.init;
-	Engine.prototype['preloadFile'] = Engine.prototype.preloadFile;
-	Engine.prototype['start'] = Engine.prototype.start;
-	Engine.prototype['startGame'] = Engine.prototype.startGame;
-	Engine.prototype['copyToFS'] = Engine.prototype.copyToFS;
-	Engine.prototype['requestQuit'] = Engine.prototype.requestQuit;
-	return Engine;
+	return SafeEngine;
 }());
 if (typeof window !== 'undefined') {
 	window['Engine'] = Engine;
diff --git a/platform/javascript/js/engine/utils.js b/platform/javascript/js/engine/utils.js
deleted file mode 100644
index 9273bbad42..0000000000
--- a/platform/javascript/js/engine/utils.js
+++ /dev/null
@@ -1,58 +0,0 @@
-const Utils = { // eslint-disable-line no-unused-vars
-
-	createLocateRewrite: function (execName) {
-		function rw(path) {
-			if (path.endsWith('.worker.js')) {
-				return `${execName}.worker.js`;
-			} else if (path.endsWith('.audio.worklet.js')) {
-				return `${execName}.audio.worklet.js`;
-			} else if (path.endsWith('.js')) {
-				return `${execName}.js`;
-			} else if (path.endsWith('.side.wasm')) {
-				return `${execName}.side.wasm`;
-			} else if (path.endsWith('.wasm')) {
-				return `${execName}.wasm`;
-			}
-			return path;
-		}
-		return rw;
-	},
-
-	createInstantiatePromise: function (wasmLoader) {
-		let loader = wasmLoader;
-		function instantiateWasm(imports, onSuccess) {
-			loader.then(function (xhr) {
-				WebAssembly.instantiate(xhr.response, imports).then(function (result) {
-					onSuccess(result['instance'], result['module']);
-				});
-			});
-			loader = null;
-			return {};
-		}
-
-		return instantiateWasm;
-	},
-
-	findCanvas: function () {
-		const nodes = document.getElementsByTagName('canvas');
-		if (nodes.length && nodes[0] instanceof HTMLCanvasElement) {
-			return nodes[0];
-		}
-		return null;
-	},
-
-	isWebGLAvailable: function (majorVersion = 1) {
-		let testContext = false;
-		try {
-			const testCanvas = document.createElement('canvas');
-			if (majorVersion === 1) {
-				testContext = testCanvas.getContext('webgl') || testCanvas.getContext('experimental-webgl');
-			} else if (majorVersion === 2) {
-				testContext = testCanvas.getContext('webgl2') || testCanvas.getContext('experimental-webgl2');
-			}
-		} catch (e) {
-			// Not available
-		}
-		return !!testContext;
-	},
-};
diff --git a/platform/javascript/js/jsdoc2rst/publish.js b/platform/javascript/js/jsdoc2rst/publish.js
new file mode 100644
index 0000000000..ad9c0fbaaa
--- /dev/null
+++ b/platform/javascript/js/jsdoc2rst/publish.js
@@ -0,0 +1,354 @@
+/* eslint-disable strict */
+
+'use strict';
+
+const fs = require('fs');
+
+class JSDoclet {
+	constructor(doc) {
+		this.doc = doc;
+		this.description = doc['description'] || '';
+		this.name = doc['name'] || 'unknown';
+		this.longname = doc['longname'] || '';
+		this.types = [];
+		if (doc['type'] && doc['type']['names']) {
+			this.types = doc['type']['names'].slice();
+		}
+		this.type = this.types.length > 0 ? this.types.join('\\|') : '*';
+		this.variable = doc['variable'] || false;
+		this.kind = doc['kind'] || '';
+		this.memberof = doc['memberof'] || null;
+		this.scope = doc['scope'] || '';
+		this.members = [];
+		this.optional = doc['optional'] || false;
+		this.defaultvalue = doc['defaultvalue'];
+		this.summary = doc['summary'] || null;
+		this.classdesc = doc['classdesc'] || null;
+
+		// Parameters (functions)
+		this.params = [];
+		this.returns = doc['returns'] ? doc['returns'][0]['type']['names'][0] : 'void';
+		this.returns_desc = doc['returns'] ? doc['returns'][0]['description'] : null;
+
+		this.params = (doc['params'] || []).slice().map((p) => new JSDoclet(p));
+
+		// Custom tags
+		this.tags = doc['tags'] || [];
+		this.header = this.tags.filter((t) => t['title'] === 'header').map((t) => t['text']).pop() || null;
+	}
+
+	add_member(obj) {
+		this.members.push(obj);
+	}
+
+	is_static() {
+		return this.scope === 'static';
+	}
+
+	is_instance() {
+		return this.scope === 'instance';
+	}
+
+	is_object() {
+		return this.kind === 'Object' || (this.kind === 'typedef' && this.type === 'Object');
+	}
+
+	is_class() {
+		return this.kind === 'class';
+	}
+
+	is_function() {
+		return this.kind === 'function' || (this.kind === 'typedef' && this.type === 'function');
+	}
+
+	is_module() {
+		return this.kind === 'module';
+	}
+}
+
+function format_table(f, data, depth = 0) {
+	if (!data.length) {
+		return;
+	}
+
+	const column_sizes = new Array(data[0].length).fill(0);
+
+	data.forEach((row) => {
+		row.forEach((e, idx) => {
+			column_sizes[idx] = Math.max(e.length, column_sizes[idx]);
+		});
+	});
+
+	const indent = ' '.repeat(depth);
+	let sep = indent;
+	column_sizes.forEach((size) => {
+		sep += '+';
+		sep += '-'.repeat(size + 2);
+	});
+	sep += '+\n';
+	f.write(sep);
+
+	data.forEach((row) => {
+		let row_text = `${indent}|`;
+		row.forEach((entry, idx) => {
+			row_text += ` ${entry.padEnd(column_sizes[idx])} |`;
+		});
+		row_text += '\n';
+		f.write(row_text);
+		f.write(sep);
+	});
+
+	f.write('\n');
+}
+
+function make_header(header, sep) {
+	return `${header}\n${sep.repeat(header.length)}\n\n`;
+}
+
+function indent_multiline(text, depth) {
+	const indent = ' '.repeat(depth);
+	return text.split('\n').map((l) => (l === '' ? l : indent + l)).join('\n');
+}
+
+function make_rst_signature(obj, types = false, style = false) {
+	let out = '';
+	const fmt = style ? '*' : '';
+	obj.params.forEach((arg, idx) => {
+		if (idx > 0) {
+			if (arg.optional) {
+				out += ` ${fmt}[`;
+			}
+			out += ', ';
+		} else {
+			out += ' ';
+			if (arg.optional) {
+				out += `${fmt}[ `;
+			}
+		}
+		if (types) {
+			out += `${arg.type} `;
+		}
+		const variable = arg.variable ? '...' : '';
+		const defval = arg.defaultvalue !== undefined ? `=${arg.defaultvalue}` : '';
+		out += `${variable}${arg.name}${defval}`;
+		if (arg.optional) {
+			out += ` ]${fmt}`;
+		}
+	});
+	out += ' ';
+	return out;
+}
+
+function make_rst_param(f, obj, depth = 0) {
+	const indent = ' '.repeat(depth * 3);
+	f.write(indent);
+	f.write(`:param ${obj.type} ${obj.name}:\n`);
+	f.write(indent_multiline(obj.description, (depth + 1) * 3));
+	f.write('\n\n');
+}
+
+function make_rst_attribute(f, obj, depth = 0, brief = false) {
+	const indent = ' '.repeat(depth * 3);
+	f.write(indent);
+	f.write(`.. js:attribute:: ${obj.name}\n\n`);
+
+	if (brief) {
+		if (obj.summary) {
+			f.write(indent_multiline(obj.summary, (depth + 1) * 3));
+		}
+		f.write('\n\n');
+		return;
+	}
+
+	f.write(indent_multiline(obj.description, (depth + 1) * 3));
+	f.write('\n\n');
+
+	f.write(indent);
+	f.write(`   :type: ${obj.type}\n\n`);
+
+	if (obj.defaultvalue !== undefined) {
+		let defval = obj.defaultvalue;
+		if (defval === '') {
+			defval = '""';
+		}
+		f.write(indent);
+		f.write(`   :value: \`\`${defval}\`\`\n\n`);
+	}
+}
+
+function make_rst_function(f, obj, depth = 0) {
+	let prefix = '';
+	if (obj.is_instance()) {
+		prefix = 'prototype.';
+	}
+
+	const indent = ' '.repeat(depth * 3);
+	const sig = make_rst_signature(obj);
+	f.write(indent);
+	f.write(`.. js:function:: ${prefix}${obj.name}(${sig})\n`);
+	f.write('\n');
+
+	f.write(indent_multiline(obj.description, (depth + 1) * 3));
+	f.write('\n\n');
+
+	obj.params.forEach((param) => {
+		make_rst_param(f, param, depth + 1);
+	});
+
+	if (obj.returns !== 'void') {
+		f.write(indent);
+		f.write('   :return:\n');
+		f.write(indent_multiline(obj.returns_desc, (depth + 2) * 3));
+		f.write('\n\n');
+		f.write(indent);
+		f.write(`   :rtype: ${obj.returns}\n\n`);
+	}
+}
+
+function make_rst_object(f, obj) {
+	let brief = false;
+	// Our custom header flag.
+	if (obj.header !== null) {
+		f.write(make_header(obj.header, '-'));
+		f.write(`${obj.description}\n\n`);
+		brief = true;
+	}
+
+	// Format members table and descriptions
+	const data = [['type', 'name']].concat(obj.members.map((m) => [m.type, `:js:attr:\`${m.name}\``]));
+
+	f.write(make_header('Properties', '^'));
+	format_table(f, data, 0);
+
+	make_rst_attribute(f, obj, 0, brief);
+
+	if (!obj.members.length) {
+		return;
+	}
+
+	f.write('   **Property Descriptions**\n\n');
+
+	// Properties first
+	obj.members.filter((m) => !m.is_function()).forEach((m) => {
+		make_rst_attribute(f, m, 1);
+	});
+
+	// Callbacks last
+	obj.members.filter((m) => m.is_function()).forEach((m) => {
+		make_rst_function(f, m, 1);
+	});
+}
+
+function make_rst_class(f, obj) {
+	const header = obj.header ? obj.header : obj.name;
+	f.write(make_header(header, '-'));
+
+	if (obj.classdesc) {
+		f.write(`${obj.classdesc}\n\n`);
+	}
+
+	const funcs = obj.members.filter((m) => m.is_function());
+	function make_data(m) {
+		const base = m.is_static() ? obj.name : `${obj.name}.prototype`;
+		const params = make_rst_signature(m, true, true);
+		const sig = `:js:attr:\`${m.name} <${base}.${m.name}>\` **(**${params}**)**`;
+		return [m.returns, sig];
+	}
+	const sfuncs = funcs.filter((m) => m.is_static());
+	const ifuncs = funcs.filter((m) => !m.is_static());
+
+	f.write(make_header('Static Methods', '^'));
+	format_table(f, sfuncs.map((m) => make_data(m)));
+
+	f.write(make_header('Instance Methods', '^'));
+	format_table(f, ifuncs.map((m) => make_data(m)));
+
+	const sig = make_rst_signature(obj);
+	f.write(`.. js:class:: ${obj.name}(${sig})\n\n`);
+	f.write(indent_multiline(obj.description, 3));
+	f.write('\n\n');
+
+	obj.params.forEach((p) => {
+		make_rst_param(f, p, 1);
+	});
+
+	f.write('   **Static Methods**\n\n');
+	sfuncs.forEach((m) => {
+		make_rst_function(f, m, 1);
+	});
+
+	f.write('   **Instance Methods**\n\n');
+	ifuncs.forEach((m) => {
+		make_rst_function(f, m, 1);
+	});
+}
+
+function make_rst_module(f, obj) {
+	const header = obj.header !== null ? obj.header : obj.name;
+	f.write(make_header(header, '='));
+	f.write(obj.description);
+	f.write('\n\n');
+}
+
+function write_base_object(f, obj) {
+	if (obj.is_object()) {
+		make_rst_object(f, obj);
+	} else if (obj.is_function()) {
+		make_rst_function(f, obj);
+	} else if (obj.is_class()) {
+		make_rst_class(f, obj);
+	} else if (obj.is_module()) {
+		make_rst_module(f, obj);
+	}
+}
+
+function generate(f, docs) {
+	const globs = [];
+	const SYMBOLS = {};
+	docs.filter((d) => !d.ignore && d.kind !== 'package').forEach((d) => {
+		SYMBOLS[d.name] = d;
+		if (d.memberof) {
+			const up = SYMBOLS[d.memberof];
+			if (up === undefined) {
+				console.log(d); // eslint-disable-line no-console
+				console.log(`Undefined symbol! ${d.memberof}`); // eslint-disable-line no-console
+				throw new Error('Undefined symbol!');
+			}
+			SYMBOLS[d.memberof].add_member(d);
+		} else {
+			globs.push(d);
+		}
+	});
+
+	f.write('.. _doc_html5_shell_classref:\n\n');
+	globs.forEach((obj) => write_base_object(f, obj));
+}
+
+/**
+ * Generate documentation output.
+ *
+ * @param {TAFFY} data - A TaffyDB collection representing
+ *                       all the symbols documented in your code.
+ * @param {object} opts - An object with options information.
+ */
+exports.publish = function (data, opts) {
+	const docs = data().get().filter((doc) => !doc.undocumented && !doc.ignore).map((doc) => new JSDoclet(doc));
+	const dest = opts.destination;
+	if (dest === 'dry-run') {
+		process.stdout.write('Dry run... ');
+		generate({
+			write: function () { /* noop */ },
+		}, docs);
+		process.stdout.write('Okay!\n');
+		return;
+	}
+	if (dest !== '' && !dest.endsWith('.rst')) {
+		throw new Error('Destination file must be either a ".rst" file, or an empty string (for printing to stdout)');
+	}
+	if (dest !== '') {
+		const f = fs.createWriteStream(dest);
+		generate(f, docs);
+	} else {
+		generate(process.stdout, docs);
+	}
+};
diff --git a/platform/javascript/package-lock.json b/platform/javascript/package-lock.json
index 8e298a495e..b8c434b3dd 100644
--- a/platform/javascript/package-lock.json
+++ b/platform/javascript/package-lock.json
@@ -43,6 +43,12 @@
         }
       }
     },
+    "@babel/parser": {
+      "version": "7.13.4",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.13.4.tgz",
+      "integrity": "sha512-uvoOulWHhI+0+1f9L4BoozY7U5cIkZ9PgJqvb041d6vypgUmtVPG4vmGm4pSggjl8BELzvHyUeJSUyEMY6b+qA==",
+      "dev": true
+    },
     "@eslint/eslintrc": {
       "version": "0.1.3",
       "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.1.3.tgz",
@@ -202,6 +208,12 @@
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
       "dev": true
     },
+    "bluebird": {
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==",
+      "dev": true
+    },
     "brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -218,6 +230,15 @@
       "integrity": "sha512-P8BjAsXvZS+VIDUI11hHCQEv74YT67YUi5JJFNWIqL235sBmjX4+qx9Muvls5ivyNENctx46xQLQ3aTuE7ssaQ==",
       "dev": true
     },
+    "catharsis": {
+      "version": "0.8.11",
+      "resolved": "https://registry.npmjs.org/catharsis/-/catharsis-0.8.11.tgz",
+      "integrity": "sha512-a+xUyMV7hD1BrDQA/3iPV7oc+6W26BgVJO05PGEoatMyIuPScQKsde6i3YorWX1qs+AZjnJ18NqdKoCtKiNh1g==",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.14"
+      }
+    },
     "chalk": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.0.tgz",
@@ -362,6 +383,12 @@
         "ansi-colors": "^4.1.1"
       }
     },
+    "entities": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-2.0.3.tgz",
+      "integrity": "sha512-MyoZ0jgnLvB2X3Lg5HqpFmn1kybDiIfEQmKzTb5apr51Rb+T3KdmMiqa70T+bhGnyv7bQ6WMj2QMHpGMmlrUYQ==",
+      "dev": true
+    },
     "error-ex": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
@@ -925,6 +952,51 @@
         "esprima": "^4.0.0"
       }
     },
+    "js2xmlparser": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/js2xmlparser/-/js2xmlparser-4.0.1.tgz",
+      "integrity": "sha512-KrPTolcw6RocpYjdC7pL7v62e55q7qOMHvLX1UCLc5AAS8qeJ6nukarEJAF2KL2PZxlbGueEbINqZR2bDe/gUw==",
+      "dev": true,
+      "requires": {
+        "xmlcreate": "^2.0.3"
+      }
+    },
+    "jsdoc": {
+      "version": "3.6.6",
+      "resolved": "https://registry.npmjs.org/jsdoc/-/jsdoc-3.6.6.tgz",
+      "integrity": "sha512-znR99e1BHeyEkSvgDDpX0sTiTu+8aQyDl9DawrkOGZTTW8hv0deIFXx87114zJ7gRaDZKVQD/4tr1ifmJp9xhQ==",
+      "dev": true,
+      "requires": {
+        "@babel/parser": "^7.9.4",
+        "bluebird": "^3.7.2",
+        "catharsis": "^0.8.11",
+        "escape-string-regexp": "^2.0.0",
+        "js2xmlparser": "^4.0.1",
+        "klaw": "^3.0.0",
+        "markdown-it": "^10.0.0",
+        "markdown-it-anchor": "^5.2.7",
+        "marked": "^0.8.2",
+        "mkdirp": "^1.0.4",
+        "requizzle": "^0.2.3",
+        "strip-json-comments": "^3.1.0",
+        "taffydb": "2.6.2",
+        "underscore": "~1.10.2"
+      },
+      "dependencies": {
+        "escape-string-regexp": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-2.0.0.tgz",
+          "integrity": "sha512-UpzcLCXolUWcNu5HtVMHYdXJjArjsF9C0aNnquZYY4uW/Vu0miy5YoWvbV345HauVvcAUnpRuhMMcqTcGOY2+w==",
+          "dev": true
+        },
+        "mkdirp": {
+          "version": "1.0.4",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
+          "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==",
+          "dev": true
+        }
+      }
+    },
     "json-schema-traverse": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
@@ -946,6 +1018,15 @@
         "minimist": "^1.2.0"
       }
     },
+    "klaw": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/klaw/-/klaw-3.0.0.tgz",
+      "integrity": "sha512-0Fo5oir+O9jnXu5EefYbVK+mHMBeEVEy2cmctR1O1NECcCkPRreJKrS6Qt/j3KC2C148Dfo9i3pCmCMsdqGr0g==",
+      "dev": true,
+      "requires": {
+        "graceful-fs": "^4.1.9"
+      }
+    },
     "levn": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/levn/-/levn-0.4.1.tgz",
@@ -956,6 +1037,15 @@
         "type-check": "~0.4.0"
       }
     },
+    "linkify-it": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/linkify-it/-/linkify-it-2.2.0.tgz",
+      "integrity": "sha512-GnAl/knGn+i1U/wjBz3akz2stz+HrHLsxMwHQGofCDfPvlf+gDKN58UtfmUquTY4/MXeE2x7k19KQmeoZi94Iw==",
+      "dev": true,
+      "requires": {
+        "uc.micro": "^1.0.1"
+      }
+    },
     "load-json-file": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
@@ -984,6 +1074,37 @@
       "integrity": "sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==",
       "dev": true
     },
+    "markdown-it": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-10.0.0.tgz",
+      "integrity": "sha512-YWOP1j7UbDNz+TumYP1kpwnP0aEa711cJjrAQrzd0UXlbJfc5aAq0F/PZHjiioqDC1NKgvIMX+o+9Bk7yuM2dg==",
+      "dev": true,
+      "requires": {
+        "argparse": "^1.0.7",
+        "entities": "~2.0.0",
+        "linkify-it": "^2.0.0",
+        "mdurl": "^1.0.1",
+        "uc.micro": "^1.0.5"
+      }
+    },
+    "markdown-it-anchor": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/markdown-it-anchor/-/markdown-it-anchor-5.3.0.tgz",
+      "integrity": "sha512-/V1MnLL/rgJ3jkMWo84UR+K+jF1cxNG1a+KwqeXqTIJ+jtA8aWSHuigx8lTzauiIjBDbwF3NcWQMotd0Dm39jA==",
+      "dev": true
+    },
+    "marked": {
+      "version": "0.8.2",
+      "resolved": "https://registry.npmjs.org/marked/-/marked-0.8.2.tgz",
+      "integrity": "sha512-EGwzEeCcLniFX51DhTpmTom+dSA/MG/OBUDjnWtHbEnjAH180VzUeAw+oE4+Zv+CoYBWyRlYOTR0N8SO9R1PVw==",
+      "dev": true
+    },
+    "mdurl": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-1.0.1.tgz",
+      "integrity": "sha1-/oWy7HWlkDfyrf7BAP1sYBdhFS4=",
+      "dev": true
+    },
     "minimatch": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
@@ -1287,6 +1408,15 @@
       "integrity": "sha512-ZOIzd8yVsQQA7j8GCSlPGXwg5PfmA1mrq0JP4nGhh54LaKN3xdai/vHUDu74pKwV8OxseMS65u2NImosQcSD0Q==",
       "dev": true
     },
+    "requizzle": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/requizzle/-/requizzle-0.2.3.tgz",
+      "integrity": "sha512-YanoyJjykPxGHii0fZP0uUPEXpvqfBDxWV7s6GKAiiOsiqhX6vHNyW3Qzdmqp/iq/ExbhaGbVrjB4ruEVSM4GQ==",
+      "dev": true,
+      "requires": {
+        "lodash": "^4.17.14"
+      }
+    },
     "resolve": {
       "version": "1.17.0",
       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.17.0.tgz",
@@ -1513,6 +1643,12 @@
         "string-width": "^3.0.0"
       }
     },
+    "taffydb": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/taffydb/-/taffydb-2.6.2.tgz",
+      "integrity": "sha1-fLy2S1oUG2ou/CxdLGe04VCyomg=",
+      "dev": true
+    },
     "text-table": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
@@ -1546,6 +1682,18 @@
       "integrity": "sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==",
       "dev": true
     },
+    "uc.micro": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-1.0.6.tgz",
+      "integrity": "sha512-8Y75pvTYkLJW2hWQHXxoqRgV7qb9B+9vFEtidML+7koHUFapnVJAZ6cKs+Qjz5Aw3aZWHMC6u0wJE3At+nSGwA==",
+      "dev": true
+    },
+    "underscore": {
+      "version": "1.10.2",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.10.2.tgz",
+      "integrity": "sha512-N4P+Q/BuyuEKFJ43B9gYuOj4TQUHXX+j2FqguVOpjkssLUUrnJofCcBccJSCoeturDoZU6GorDTHSvUDlSQbTg==",
+      "dev": true
+    },
     "uri-js": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.0.tgz",
@@ -1600,6 +1748,12 @@
       "requires": {
         "mkdirp": "^0.5.1"
       }
+    },
+    "xmlcreate": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/xmlcreate/-/xmlcreate-2.0.3.tgz",
+      "integrity": "sha512-HgS+X6zAztGa9zIK3Y3LXuJes33Lz9x+YyTxgrkIdabu2vqcGOWwdfCpf1hWLRrd553wd4QCDf6BBO6FfdsRiQ==",
+      "dev": true
     }
   }
 }
diff --git a/platform/javascript/package.json b/platform/javascript/package.json
index 630b584f5b..d9d272923e 100644
--- a/platform/javascript/package.json
+++ b/platform/javascript/package.json
@@ -5,20 +5,24 @@
   "description": "Linting setup for Godot's HTML5 platform code",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "lint": "npm run lint:engine && npm run lint:libs && npm run lint:modules",
+    "docs": "jsdoc --template js/jsdoc2rst/ js/engine/engine.js js/engine/config.js --destination ''",
+    "lint": "npm run lint:engine && npm run lint:libs && npm run lint:modules && npm run lint:tools",
     "lint:engine": "eslint \"js/engine/*.js\" --no-eslintrc -c .eslintrc.engine.js",
     "lint:libs": "eslint \"js/libs/*.js\" --no-eslintrc -c .eslintrc.libs.js",
     "lint:modules": "eslint \"../../modules/**/*.js\" --no-eslintrc -c .eslintrc.libs.js",
-    "format": "npm run format:engine && npm run format:libs && npm run format:modules",
+    "lint:tools": "eslint \"js/jsdoc2rst/**/*.js\" --no-eslintrc -c .eslintrc.engine.js",
+    "format": "npm run format:engine && npm run format:libs && npm run format:modules && npm run format:tools",
     "format:engine": "npm run lint:engine -- --fix",
     "format:libs": "npm run lint:libs -- --fix",
-    "format:modules": "npm run lint:modules -- --fix"
+    "format:modules": "npm run lint:modules -- --fix",
+    "format:tools": "npm run lint:tools -- --fix"
   },
   "author": "Godot Engine contributors",
   "license": "MIT",
   "devDependencies": {
     "eslint": "^7.9.0",
     "eslint-config-airbnb-base": "^14.2.0",
-    "eslint-plugin-import": "^2.22.0"
+    "eslint-plugin-import": "^2.22.0",
+    "jsdoc": "^3.6.6"
   }
 }
diff --git a/platform/linuxbsd/detect.py b/platform/linuxbsd/detect.py
index 8f1afe0e66..09d185ae2b 100644
--- a/platform/linuxbsd/detect.py
+++ b/platform/linuxbsd/detect.py
@@ -70,6 +70,7 @@ def get_opts():
         BoolVariable("use_asan", "Use LLVM/GCC compiler address sanitizer (ASAN))", False),
         BoolVariable("use_lsan", "Use LLVM/GCC compiler leak sanitizer (LSAN))", False),
         BoolVariable("use_tsan", "Use LLVM/GCC compiler thread sanitizer (TSAN))", False),
+        BoolVariable("use_msan", "Use LLVM/GCC compiler memory sanitizer (MSAN))", False),
         BoolVariable("pulseaudio", "Detect and use PulseAudio", True),
         BoolVariable("udev", "Use udev for gamepad connection callbacks", True),
         BoolVariable("debug_symbols", "Add debugging symbols to release/release_debug builds", True),
@@ -142,7 +143,7 @@ def configure(env):
         env.Append(CCFLAGS=["-ftest-coverage", "-fprofile-arcs"])
         env.Append(LINKFLAGS=["-ftest-coverage", "-fprofile-arcs"])
 
-    if env["use_ubsan"] or env["use_asan"] or env["use_lsan"] or env["use_tsan"]:
+    if env["use_ubsan"] or env["use_asan"] or env["use_lsan"] or env["use_tsan"] or env["use_msan"]:
         env.extra_suffix += "s"
 
         if env["use_ubsan"]:
@@ -161,6 +162,10 @@ def configure(env):
             env.Append(CCFLAGS=["-fsanitize=thread"])
             env.Append(LINKFLAGS=["-fsanitize=thread"])
 
+        if env["use_msan"]:
+            env.Append(CCFLAGS=["-fsanitize=memory"])
+            env.Append(LINKFLAGS=["-fsanitize=memory"])
+
     if env["use_lto"]:
         if not env["use_llvm"] and env.GetOption("num_jobs") > 1:
             env.Append(CCFLAGS=["-flto"])
diff --git a/platform/linuxbsd/display_server_x11.cpp b/platform/linuxbsd/display_server_x11.cpp
index fceeb82325..d7f7054acb 100644
--- a/platform/linuxbsd/display_server_x11.cpp
+++ b/platform/linuxbsd/display_server_x11.cpp
@@ -727,9 +727,9 @@ Point2i DisplayServerX11::screen_get_position(int p_screen) const {
 
 	int count;
 	XineramaScreenInfo *xsi = XineramaQueryScreens(x11_display, &count);
-	if (p_screen >= count) {
-		return Point2i(0, 0);
-	}
+
+	// Check if screen is valid
+	ERR_FAIL_INDEX_V(p_screen, count, Point2i(0, 0));
 
 	Point2i position = Point2i(xsi[p_screen].x_org, xsi[p_screen].y_org);
 
@@ -758,9 +758,9 @@ Rect2i DisplayServerX11::screen_get_usable_rect(int p_screen) const {
 
 	int count;
 	XineramaScreenInfo *xsi = XineramaQueryScreens(x11_display, &count);
-	if (p_screen >= count) {
-		return Rect2i(0, 0, 0, 0);
-	}
+
+	// Check if screen is valid
+	ERR_FAIL_INDEX_V(p_screen, count, Rect2i(0, 0, 0, 0));
 
 	Rect2i rect = Rect2i(xsi[p_screen].x_org, xsi[p_screen].y_org, xsi[p_screen].width, xsi[p_screen].height);
 	XFree(xsi);
@@ -1041,11 +1041,13 @@ void DisplayServerX11::window_set_current_screen(int p_screen, WindowID p_window
 	ERR_FAIL_COND(!windows.has(p_window));
 	WindowData &wd = windows[p_window];
 
-	int count = get_screen_count();
-	if (p_screen >= count) {
-		return;
+	if (p_screen == SCREEN_OF_MAIN_WINDOW) {
+		p_screen = window_get_current_screen();
 	}
 
+	// Check if screen is valid
+	ERR_FAIL_INDEX(p_screen, get_screen_count());
+
 	if (window_get_mode(p_window) == WINDOW_MODE_FULLSCREEN) {
 		Point2i position = screen_get_position(p_screen);
 		Size2i size = screen_get_size(p_screen);
diff --git a/platform/osx/detect.py b/platform/osx/detect.py
index acea00c5ac..c39a4426be 100644
--- a/platform/osx/detect.py
+++ b/platform/osx/detect.py
@@ -35,6 +35,7 @@ def get_opts():
         BoolVariable("separate_debug_symbols", "Create a separate file containing debugging symbols", False),
         BoolVariable("use_ubsan", "Use LLVM/GCC compiler undefined behavior sanitizer (UBSAN)", False),
         BoolVariable("use_asan", "Use LLVM/GCC compiler address sanitizer (ASAN))", False),
+        BoolVariable("use_lsan", "Use LLVM/GCC compiler leak sanitizer (LSAN))", False),
         BoolVariable("use_tsan", "Use LLVM/GCC compiler thread sanitizer (TSAN))", False),
     ]
 
@@ -131,7 +132,7 @@ def configure(env):
         env["AS"] = basecmd + "as"
         env.Append(CPPDEFINES=["__MACPORTS__"])  # hack to fix libvpx MM256_BROADCASTSI128_SI256 define
 
-    if env["use_ubsan"] or env["use_asan"] or env["use_tsan"]:
+    if env["use_ubsan"] or env["use_asan"] or env["use_lsan"] or env["use_tsan"]:
         env.extra_suffix += "s"
 
         if env["use_ubsan"]:
@@ -142,6 +143,10 @@ def configure(env):
             env.Append(CCFLAGS=["-fsanitize=address"])
             env.Append(LINKFLAGS=["-fsanitize=address"])
 
+        if env["use_lsan"]:
+            env.Append(CCFLAGS=["-fsanitize=leak"])
+            env.Append(LINKFLAGS=["-fsanitize=leak"])
+
         if env["use_tsan"]:
             env.Append(CCFLAGS=["-fsanitize=thread"])
             env.Append(LINKFLAGS=["-fsanitize=thread"])
diff --git a/platform/server/detect.py b/platform/server/detect.py
index 5be7e81e7a..c799ce03e1 100644
--- a/platform/server/detect.py
+++ b/platform/server/detect.py
@@ -39,6 +39,7 @@ def get_opts():
         BoolVariable("use_lsan", "Use LLVM/GCC compiler leak sanitizer (LSAN))", False),
         BoolVariable("use_tsan", "Use LLVM/GCC compiler thread sanitizer (TSAN))", False),
         BoolVariable("debug_symbols", "Add debugging symbols to release/release_debug builds", True),
+        BoolVariable("use_msan", "Use LLVM/GCC compiler memory sanitizer (MSAN))", False),
         BoolVariable("separate_debug_symbols", "Create a separate file containing debugging symbols", False),
         BoolVariable("execinfo", "Use libexecinfo on systems where glibc is not available", False),
     ]
@@ -99,7 +100,7 @@ def configure(env):
         env.Append(CCFLAGS=["-ftest-coverage", "-fprofile-arcs"])
         env.Append(LINKFLAGS=["-ftest-coverage", "-fprofile-arcs"])
 
-    if env["use_ubsan"] or env["use_asan"] or env["use_lsan"] or env["use_tsan"]:
+    if env["use_ubsan"] or env["use_asan"] or env["use_lsan"] or env["use_tsan"] or env["use_msan"]:
         env.extra_suffix += "s"
 
         if env["use_ubsan"]:
@@ -118,6 +119,10 @@ def configure(env):
             env.Append(CCFLAGS=["-fsanitize=thread"])
             env.Append(LINKFLAGS=["-fsanitize=thread"])
 
+        if env["use_msan"]:
+            env.Append(CCFLAGS=["-fsanitize=memory"])
+            env.Append(LINKFLAGS=["-fsanitize=memory"])
+
     if env["use_lto"]:
         env.Append(CCFLAGS=["-flto"])
         if not env["use_llvm"] and env.GetOption("num_jobs") > 1: