diff --git a/gfx/tests/crashtests/1768096-1.html b/gfx/tests/crashtests/1768096-1.html
new file mode 100644
index 000000000000..994bad5a3487
--- /dev/null
+++ b/gfx/tests/crashtests/1768096-1.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<style id='a'>
+* {
+  margin: 63% auto;
+  border-start-start-radius: 96% 51%;
+  transition-duration: 3s;
+}
+</style>
+<script>
+window.addEventListener('load', () => {
+  document.documentElement.insertAdjacentHTML(
+    'afterbegin',
+    '<style>' +
+    'A { user-select: contain }\n' +
+    '* { ' +
+    'margin-inline-end: 0.24012348925467253px !important; ' +
+    'border-radius: 3338200034.36pc 2247759657.74px / 3661748185.77ch 2835570269% 169103236.41vmax; ' +
+    'font-size: xx-small; ' +
+    '}' +
+    '</style>'
+  );
+  document.documentElement.getClientRects();
+  document.getElementById('a').type = 'video/webm';
+  // Allow time for the transition to run before we end the test.
+  setTimeout("document.documentElement.className = ''", 5000);
+})
+</script>
+<meter lang='ar'>
+<var lang='xyzzy'>
diff --git a/gfx/tests/crashtests/crashtests.list b/gfx/tests/crashtests/crashtests.list
index 933cc1079284..a6d4c48472e6 100644
--- a/gfx/tests/crashtests/crashtests.list
+++ b/gfx/tests/crashtests/crashtests.list
@@ -213,3 +213,4 @@ load 1757002.html
 load 1758127-1.html
 load 1762973-1.html
 pref(layout.css.backdrop-filter.enabled,true) load 1765667.html
+load 1768096-1.html
