diff --git a/extensions/DevidBittFive/ramusage.js b/extensions/DevidBittFive/ramusage.js
new file mode 100644
index 0000000000..50a4cea588
--- /dev/null
+++ b/extensions/DevidBittFive/ramusage.js
@@ -0,0 +1,72 @@
+// Name: RAM Monitor
+// ID: bitterRamUsage
+// Description: Monitors current RAM usage and percentage.
+// By: DevidBittFive <https://scratch.mit.edu/users/Bitter_160/>
+// License: EPL-2.0 OR GPL-2.0-or-later
+
+/**!
+ * @license EPL-2.0 OR GPL-2.0-or-later
+ * All code contained in this extension is licensed under the Eclipse Public License v2.0.
+ *
+ * If you have not received a copy of this license, you may access it
+ * at the following link: https://www.eclipse.org/legal/epl-2.0/
+ */
+
+(function (Scratch) {
+  "use strict";
+
+  // Cache once outside the class
+  const mem =
+    globalThis.performance && globalThis.performance.memory
+      ? globalThis.performance.memory
+      : null;
+
+  class RamUsageExtension {
+    getInfo() {
+      return {
+        id: "bitterRamUsage",
+        name: Scratch.translate("RAM Monitor"),
+        blocks: [
+          {
+            blockType: Scratch.BlockType.XML,
+            xml: mem
+              ? ""
+              : `
+                                      <sep gap="-12" />
+                                      <label text="${Scratch.translate("Your browser does not")}" /><sep gap="-12" />
+                                      <label text="${Scratch.translate("support the &quot;performance.memory&quot;")}" /><sep gap="-12" />
+                                      <label text="${Scratch.translate("API")}" />
+                                  `,
+          },
+          {
+            opcode: "getRamUsageMB",
+            blockType: Scratch.BlockType.REPORTER,
+            text: Scratch.translate("get RAM usage in MB"),
+          },
+          {
+            opcode: "getRamUsagePercent",
+            blockType: Scratch.BlockType.REPORTER,
+            text: Scratch.translate("get RAM usage percent"),
+          },
+        ],
+      };
+    }
+
+    getRamUsageMB() {
+      // Check the cached mem variable directly
+      if (!mem) return NaN;
+
+      return mem.usedJSHeapSize / 1024 / 1024;
+    }
+
+    getRamUsagePercent() {
+      // Simplified check
+      if (!mem) return NaN;
+
+      // Calculate percentage as a raw number
+      return (mem.usedJSHeapSize / mem.jsHeapSizeLimit) * 100;
+    }
+  }
+
+  Scratch.extensions.register(new RamUsageExtension());
+})(Scratch);
diff --git a/extensions/extensions.json b/extensions/extensions.json
index 442f300d59..f6ca7836ca 100644
--- a/extensions/extensions.json
+++ b/extensions/extensions.json
@@ -39,6 +39,7 @@
   "shreder95ua/resolution",
   "XmerOriginals/closecontrol",
   "navigator",
+  "DevidBittFive/ramusage",
   "battery",
   "PwLDev/vibration",
   "TheShovel/CustomStyles",