diff --git a/testing/web-platform/meta/fetch/sec-metadata/window-open.tentative.https.sub.html.ini b/testing/web-platform/meta/fetch/sec-metadata/window-open.tentative.https.sub.html.ini
index 0595b8bcbae0..5b4b0514446c 100644
--- a/testing/web-platform/meta/fetch/sec-metadata/window-open.tentative.https.sub.html.ini
+++ b/testing/web-platform/meta/fetch/sec-metadata/window-open.tentative.https.sub.html.ini
@@ -1,6 +1,7 @@
 [window-open.tentative.https.sub.html]
   disabled:
     if os == "android" and not e10s: https://bugzilla.mozilla.org/show_bug.cgi?id=1499003
+    if debug and (os == "linux") and (bits == 32): https://bugzilla.mozilla.org/show_bug.cgi?id=1539615
   [Same-origin window, forced]
     expected: FAIL