1 files changed, 24 insertions, 0 deletions
diff --git a/toolkit/components/aboutperformance/tests/browser/tab_use_memory.html b/toolkit/components/aboutperformance/tests/browser/tab_use_memory.html
new file mode 100644
index 0000000000..b72abae3f7
--- /dev/null
+++ b/toolkit/components/aboutperformance/tests/browser/tab_use_memory.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="UTF-8">
+  <title>
+    Main frame for test browser_aboutperformance.js
+  </title>
+</head>
+<body>
+<p>
+  Mostly empty document, the script creates a big array.
+</p>
+</body>
+<script>
+  var big_array = [];
+  for (let i = 0; i < 4 * 1024 * 1024; i++) {
+    big_array[i] = i*i;
+  }
+
+  window.waitForTestReady = async () => {
+    // big_array is created so we are ready.
+  };
+</script>
+</html>