diff -r 000000000000 -r 6474c204b198 browser/devtools/shadereditor/test/browser_webgl-actor-test-11.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/shadereditor/test/browser_webgl-actor-test-11.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,25 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests if the WebGL context is never instrumented anymore after the
+ * finalize method is called.
+ */
+
+function ifWebGLSupported() {
+  let [target, debuggee, front] = yield initBackend(SIMPLE_CANVAS_URL);
+
+  let linked = once(front, "program-linked");
+  front.setup({ reload: true });
+  yield linked;
+  ok(true, "Canvas was correctly instrumented on the first navigation.");
+
+  once(front, "program-linked").then(() => {
+    ok(false, "A 'program-linked' notification shouldn't have been sent!");
+  });
+
+  yield front.finalize();
+  yield reload(target);
+  yield removeTab(target.tab);
+  finish();
+}