diff --git a/packages/csp/src/parser.js b/packages/csp/src/parser.js
index 99ef7bd99..133c90f19 100644
--- a/packages/csp/src/parser.js
+++ b/packages/csp/src/parser.js
@@ -3,7 +3,7 @@ let globals = new Set()
 
 Object.getOwnPropertyNames(globalThis).forEach(key => {
     // Prevent Chrome and Safari deprecation warning...
-    if (key === "styleMedia" || key === "sharedStorage") return
+    if (key === "styleMedia" || key === "sharedStorage" || key === "fence") return
 
     let value
 
diff --git a/tests/vitest/csp-globals.spec.js b/tests/vitest/csp-globals.spec.js
new file mode 100644
index 000000000..8da21e0af
--- /dev/null
+++ b/tests/vitest/csp-globals.spec.js
@@ -0,0 +1,20 @@
+// @vitest-environment jsdom
+
+import { it, expect } from 'vitest';
+
+it('does not read the globals that browsers report as deprecated', async () => {
+    let read = []
+
+    for (let key of ['styleMedia', 'sharedStorage', 'fence']) {
+        Object.defineProperty(globalThis, key, {
+            configurable: true,
+            get() {
+                read.push(key)
+            },
+        })
+    }
+
+    await import('../../packages/csp/src/parser.js')
+
+    expect(read).toEqual([])
+})