diff --git a/extensions/-SIPC-/recording.js b/extensions/-SIPC-/recording.js
index c42863f4a2..c8a62369b5 100644
--- a/extensions/-SIPC-/recording.js
+++ b/extensions/-SIPC-/recording.js
@@ -91,6 +91,7 @@
       recordedChunks = [];
     }
     stopRecordingAndDownload({ name }) {
+      name = Scratch.Cast.toString(name);
       if (!mediaRecorder) {
         console.error("Recording not started");
         return;
diff --git a/extensions/0832/rxFS.js b/extensions/0832/rxFS.js
index a9b73e43c0..5720819487 100644
--- a/extensions/0832/rxFS.js
+++ b/extensions/0832/rxFS.js
@@ -170,6 +170,8 @@
     }
 
     sync({ STR, STR2 }) {
+      STR = Scratch.Cast.toString(STR);
+      STR2 = Scratch.Cast.toString(STR2);
       str = btoa(unescape(encodeURIComponent(STR)));
       str2 = btoa(unescape(encodeURIComponent(STR2)));
       if (rxFSsy.indexOf(str) + 1 == 0) {
@@ -178,6 +180,7 @@
     }
 
     start({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       str = btoa(unescape(encodeURIComponent(STR)));
       if (
         !(str.charAt(str.length - 1) == "/") &&
@@ -189,6 +192,7 @@
     }
 
     open({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       return decodeURIComponent(
         escape(
           atob(
@@ -201,6 +205,7 @@
     }
 
     del({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       str = btoa(unescape(encodeURIComponent(STR)));
       const index = rxFSsy.indexOf(str);
       if (index !== -1) {
@@ -210,11 +215,14 @@
     }
 
     file({ STR, STR2 }) {
+      STR = Scratch.Cast.toString(STR);
+      STR2 = Scratch.Cast.toString(STR2);
       rxFSfi[rxFSsy.indexOf(btoa(unescape(encodeURIComponent(STR)))) + 1 - 1] =
         btoa(unescape(encodeURIComponent(STR2)));
     }
 
     search({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       Search = "";
       i = 0;
       str = btoa(unescape(encodeURIComponent(STR)));
@@ -239,6 +247,7 @@
     }
 
     webin({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       return Scratch.fetch(STR)
         .then((response) => {
           return response.text();
@@ -250,6 +259,7 @@
     }
 
     in({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       rxFSfi = STR.slice(0, STR.indexOf("|")).split(",");
       rxFSsy = STR.slice(STR.indexOf("|") + 1, STR.length).split(",");
     }
diff --git a/extensions/0832/rxFS2.js b/extensions/0832/rxFS2.js
index bacd6883d9..e6d41e5be8 100644
--- a/extensions/0832/rxFS2.js
+++ b/extensions/0832/rxFS2.js
@@ -201,6 +201,8 @@
     }
 
     sync({ STR, STR2 }) {
+      STR = Scratch.Cast.toString(STR);
+      STR2 = Scratch.Cast.toString(STR2);
       str = encodeURIComponent(STR);
       str2 = encodeURIComponent(STR2);
       if (rxFSsy.indexOf(str) + 1 == 0) {
@@ -209,6 +211,7 @@
     }
 
     start({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       str = encodeURIComponent(STR);
       if (
         !(str.charAt(str.length - 1) == "/") &&
@@ -220,12 +223,15 @@
     }
 
     open({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       return decodeURIComponent(
         rxFSfi[rxFSsy.indexOf(encodeURIComponent(STR)) + 1 - 1]
       );
     }
 
     del({ STR }) {
+      STR = Scratch.Cast.toString(STR);
+      STR2 = Scratch.Cast.toString(STR2);
       str = encodeURIComponent(STR);
       const index = rxFSsy.indexOf(str);
       if (index !== -1) {
@@ -235,11 +241,14 @@
     }
 
     folder({ STR, STR2 }) {
+      STR = Scratch.Cast.toString(STR);
+      STR2 = Scratch.Cast.toString(STR2);
       rxFSfi[rxFSsy.indexOf(encodeURIComponent(STR)) + 1 - 1] =
         encodeURIComponent(STR2);
     }
 
     search({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       Search = "";
       i = 0;
       str = encodeURIComponent(STR);
@@ -252,6 +261,7 @@
     }
 
     list({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       Search = "";
       i = 0;
       str = encodeURIComponent(STR);
@@ -264,6 +274,7 @@
     }
 
     webin({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       return Scratch.fetch(STR)
         .then((response) => {
           return response.text();
@@ -275,6 +286,7 @@
     }
 
     in({ STR }) {
+      STR = Scratch.Cast.toString(STR);
       rxFSfi = STR.slice(0, STR.indexOf("|")).split(",");
       rxFSsy = STR.slice(STR.indexOf("|") + 1, STR.length).split(",");
     }
diff --git a/extensions/CST1229/images.js b/extensions/CST1229/images.js
index 346517eeb9..c6fbdc4586 100644
--- a/extensions/CST1229/images.js
+++ b/extensions/CST1229/images.js
@@ -273,8 +273,8 @@
         img.updateVisible(false);
         img.skin = this.render._allSkins[IMG];
 
-        img.updatePosition([Number(X) || 0, Number(Y) || 0]);
-        img.updateScale([Number(XSCALE) || 0, Number(YSCALE) || 0]);
+        img.updatePosition([Scratch.Cast.toNumber(X) || 0, Scratch.Cast.toNumber(Y) || 0]);
+        img.updateScale([Scratch.Cast.toNumber(XSCALE) || 0, Scratch.Cast.toNumber(YSCALE) || 0]);
         this.render.penStamp(this.render._penSkinId, drawableID);
       } catch (e) {
         console.error("Error drawing image:", e);
diff --git a/extensions/CST1229/zip.js b/extensions/CST1229/zip.js
index e97e309423..77f643fe1f 100644
--- a/extensions/CST1229/zip.js
+++ b/extensions/CST1229/zip.js
@@ -625,8 +625,8 @@
     /// Utilities
 
     normalize(origin, path) {
-      path = path.toString().replaceAll(/\\/g, "/");
-      origin = origin.toString().replaceAll(/\\/g, "/");
+      path = Scratch.Cast.toString(path).replaceAll(/\\/g, "/");
+      origin = Scratch.Cast.toString(origin).replaceAll(/\\/g, "/");
 
       if (path.startsWith("/")) origin = "";
       else if (!origin.endsWith("/")) origin += "/";
diff --git a/extensions/CubesterYT/WindowControls.js b/extensions/CubesterYT/WindowControls.js
index ff1ea7d3c9..d535d7aa19 100644
--- a/extensions/CubesterYT/WindowControls.js
+++ b/extensions/CubesterYT/WindowControls.js
@@ -5,7 +5,7 @@
 // Original: BlueDome77
 // License: MIT
 
-// Version V.1.0.0
+// Version V.1.0.1
 
 (function (Scratch) {
   "use strict";
@@ -370,10 +370,13 @@
     }
 
     moveTo(args) {
+      args.X = Scratch.Cast.toNumber(args.X);
+      args.Y = Scratch.Cast.toNumber(args.Y);
       window.moveTo(args.X, args.Y);
       Scratch.vm.runtime.requestRedraw();
     }
     moveToPresets(args) {
+      args.PRESETS = Scratch.Cast.toString(args.PRESETS);
       if (args.PRESETS == "center") {
         const left = (screen.width - window.outerWidth) / 2;
         const top = (screen.height - window.outerHeight) / 2;
@@ -412,19 +415,23 @@
       Scratch.vm.runtime.requestRedraw();
     }
     changeX(args) {
+      args.X = Scratch.Cast.toNumber(args.X);
       window.moveBy(args.X, 0);
       Scratch.vm.runtime.requestRedraw();
     }
     setX(args) {
+      args.X = Scratch.Cast.toNumber(args.X);
       const currentY = window.screenY;
       window.moveTo(args.X, currentY);
       Scratch.vm.runtime.requestRedraw();
     }
     changeY(args) {
+      args.X = Scratch.Cast.toNumber(args.Y);
       window.moveBy(0, args.Y);
       Scratch.vm.runtime.requestRedraw();
     }
     setY(args) {
+      args.Y = Scratch.Cast.toNumber(args.Y);
       const currentX = window.screenX;
       window.moveTo(currentX, args.Y);
       Scratch.vm.runtime.requestRedraw();
@@ -436,10 +443,13 @@
       return window.screenTop;
     }
     resizeTo(args) {
+      args.W = Scratch.Cast.toNumber(args.W);
+      args.H = Scratch.Cast.toNumber(args.H);
       window.resizeTo(args.W, args.H);
       Scratch.vm.runtime.requestRedraw();
     }
     resizeToPresets(args) {
+      args.PRESETS = Scratch.Cast.toString(args.PRESETS);
       if (args.PRESETS == "480x360") {
         window.resizeTo(
           480 + (window.outerWidth - window.innerWidth),
@@ -484,19 +494,23 @@
       Scratch.vm.runtime.requestRedraw();
     }
     changeW(args) {
+      args.W = Scratch.Cast.toNumber(args.W);
       window.resizeBy(args.W, 0);
       Scratch.vm.runtime.requestRedraw();
     }
     setW(args) {
+      args.W = Scratch.Cast.toNumber(args.W);
       const currentH = window.outerHeight;
       window.resizeTo(args.W, currentH);
       Scratch.vm.runtime.requestRedraw();
     }
     changeH(args) {
+      args.H = Scratch.Cast.toNumber(args.H);
       window.resizeBy(0, args.H);
       Scratch.vm.runtime.requestRedraw();
     }
     setH(args) {
+      args.H = Scratch.Cast.toNumber(args.H);
       const currentW = window.outerWidth;
       window.resizeTo(currentW, args.H);
       Scratch.vm.runtime.requestRedraw();
@@ -535,7 +549,7 @@
       return document.hasFocus();
     }
     changeTitleTo(args) {
-      document.title = args.TITLE;
+      document.title = Scratch.Cast.toString(args.TITLE);
     }
     windowTitle() {
       return document.title;
diff --git a/extensions/DT/cameracontrols.js b/extensions/DT/cameracontrols.js
index 672c468cdf..39d4ab6b1c 100644
--- a/extensions/DT/cameracontrols.js
+++ b/extensions/DT/cameracontrols.js
@@ -505,53 +505,53 @@
     }
 
     setBoth(args, util) {
-      cameraX = +args.x;
-      cameraY = +args.y;
+      cameraX = Scratch.Cast.toNumber(args.x) || 0;
+      cameraY = Scratch.Cast.toNumber(args.y) || 0;
       updateCamera();
       vm.runtime.requestRedraw();
     }
     changeZoom(args, util) {
-      cameraZoom += +args.val;
+      cameraZoom += Scratch.Cast.toNumber(args.val) || 0;
       updateCamera();
       vm.runtime.requestRedraw();
     }
     setZoom(args, util) {
-      cameraZoom = +args.val;
+      cameraZoom = Scratch.Cast.toNumber(args.val) || 0;
       updateCamera();
       vm.runtime.requestRedraw();
     }
     changeX(args, util) {
-      cameraX += +args.val;
+      cameraX += Scratch.Cast.toNumber(args.val) || 0;
       updateCamera();
       vm.runtime.requestRedraw();
     }
     setX(args, util) {
-      cameraX = +args.val;
+      cameraX = Scratch.Cast.toNumber(args.val) || 0;
       updateCamera();
       vm.runtime.requestRedraw();
     }
     changeY(args, util) {
-      cameraY += +args.val;
+      cameraY += Scratch.Cast.toNumber(args.val) || 0;
       updateCamera();
       vm.runtime.requestRedraw();
     }
     setY(args, util) {
-      cameraY = +args.val;
+      cameraY = Scratch.Cast.toNumber(args.val) || 0;
       updateCamera();
       vm.runtime.requestRedraw();
     }
     setDirection(args, util) {
-      cameraDirection = +args.val;
+      cameraDirection = Scratch.Cast.toNumber(args.val) || 0;
       updateCamera();
       vm.runtime.requestRedraw();
     }
     rotateCW(args, util) {
-      cameraDirection = cameraDirection + +args.val;
+      cameraDirection = cameraDirection + (Scratch.Cast.toNumber(args.val) || 0);
       updateCamera();
       vm.runtime.requestRedraw();
     }
     rotateCCW(args, util) {
-      cameraDirection = cameraDirection - +args.val;
+      cameraDirection = cameraDirection - (Scratch.Cast.toNumber(args.val) || 0);
       updateCamera();
       vm.runtime.requestRedraw();
     }
diff --git a/extensions/JeremyGamer13/tween.js b/extensions/JeremyGamer13/tween.js
index 7662cd8c40..e743390bc8 100644
--- a/extensions/JeremyGamer13/tween.js
+++ b/extensions/JeremyGamer13/tween.js
@@ -576,6 +576,7 @@
     }
 
     tweenProperty(args, util) {
+      args.PROPERTY = Cast.toString(args.PROPERTY);
       let currentValue = 0;
       if (args.PROPERTY === "x position") {
         currentValue = util.target.x;
diff --git a/extensions/Lily/LooksPlus.js b/extensions/Lily/LooksPlus.js
index 2a7bc3bfe5..69a10b4955 100644
--- a/extensions/Lily/LooksPlus.js
+++ b/extensions/Lily/LooksPlus.js
@@ -381,7 +381,7 @@
       }
       const drawableID = target.drawableID;
       const layerOrder = target.getLayerOrder();
-      const newLayer = args.LAYER - layerOrder;
+      const newLayer = Scratch.Cast.toNumber(args.LAYER) - layerOrder;
       renderer.setDrawableOrder(drawableID, newLayer, "sprite", true);
     }
 
@@ -466,7 +466,7 @@
         return;
       }
 
-      const contentType = args.TYPE;
+      const contentType = Scratch.Cast.toString(args.TYPE);
       const content = args.CONTENT;
       if (contentType === "SVG") {
         try {
@@ -532,13 +532,13 @@
         return "";
       }
 
-      const costume = target.sprite.costumes[args.COSTUME - 1];
+      const costume = target.sprite.costumes[Scratch.Cast.toNumber(args.COSTUME) - 1];
       if (!costume) {
         console.error("Target costume does not exist");
         return "";
       }
 
-      const format = args.CONTENT;
+      const format = Scratch.Cast.toString(args.CONTENT);
       if (format === "content") {
         return costume.asset.decodeText();
       } else {
diff --git a/extensions/Lily/MoreTimers.js b/extensions/Lily/MoreTimers.js
index 6c90e2ef28..a65b8e902a 100644
--- a/extensions/Lily/MoreTimers.js
+++ b/extensions/Lily/MoreTimers.js
@@ -207,6 +207,8 @@
     }
 
     whenTimerOp(args) {
+      args.TIMER = Scratch.Cast.toString(args.TIMER);
+      args.NUM = Scratch.Cast.toNumber(args.NUM);
       if (!timers[args.TIMER]) return false;
       const value = timerValue(timers[args.TIMER]);
       if (args.OP === ">") return value > args.NUM;
@@ -215,6 +217,7 @@
     }
 
     startResetTimer(args) {
+      args.TIMER = Scratch.Cast.toString(args.TIMER);
       timers[args.TIMER] = {
         startTime: Math.floor(performance.now()),
         pauseTime: 0,
@@ -223,6 +226,7 @@
     }
 
     pauseTimer(args) {
+      args.TIMER = Scratch.Cast.toString(args.TIMER);
       const timer = timers[args.TIMER];
       if (!timer) return;
       timer.pauseTime = timerValue(timer) * 1000;
@@ -230,6 +234,7 @@
     }
 
     resumeTimer(args) {
+      args.TIMER = Scratch.Cast.toString(args.TIMER);
       const timer = timers[args.TIMER];
       if (!timer) return;
       if (timer.paused === false) return;
@@ -238,11 +243,13 @@
     }
 
     valueOfTimer(args) {
+      args.TIMER = Scratch.Cast.toString(args.TIMER);
       if (!timers[args.TIMER]) return "";
       return timerValue(timers[args.TIMER]);
     }
 
     setTimer(args) {
+      args.TIMER = Scratch.Cast.toString(args.TIMER);
       timers[args.TIMER] = {
         paused: false,
         startTime: Math.floor(performance.now()),
@@ -251,6 +258,7 @@
     }
 
     changeTimer(args) {
+      args.TIMER = Scratch.Cast.toString(args.TIMER);
       if (!timers[args.TIMER]) this.startResetTimer(args);
       timers[args.TIMER].pauseTime += Scratch.Cast.toNumber(args.NUM) * 1000;
     }
@@ -264,6 +272,7 @@
     }
 
     timerExists(args) {
+      args.TIMER = Scratch.Cast.toString(args.TIMER);
       return !!timers[args.TIMER];
     }
 
diff --git a/extensions/Lily/SoundExpanded.js b/extensions/Lily/SoundExpanded.js
index 00e8c32548..2322abb3e8 100644
--- a/extensions/Lily/SoundExpanded.js
+++ b/extensions/Lily/SoundExpanded.js
@@ -595,7 +595,7 @@
       if (len === 0) {
         return -1;
       }
-      const index = this._getSoundIndexByName(soundName, util);
+      const index = this._getSoundIndexByName(Scratch.Cast.oString(soundName), util);
       if (index !== -1) {
         return index;
       }