diff --git a/editor/libeditor/html/crashtests/crashtests.list b/editor/libeditor/html/crashtests/crashtests.list
index 8cf82880bfb4..9148138d3aab 100644
--- a/editor/libeditor/html/crashtests/crashtests.list
+++ b/editor/libeditor/html/crashtests/crashtests.list
@@ -5,7 +5,7 @@ load 407277-1.html
 load 418923-1.html
 load 420439.html
 load 428489-1.html
-load 431086-1.xhtml
+asserts(0-16) load 431086-1.xhtml # Bug 439258
 load 448329-1.html
 load 448329-2.html
 load 448329-3.html
@@ -19,5 +19,5 @@ load 535632-1.xhtml
 load 574558-1.xhtml
 load 582138-1.xhtml
 load 612565-1.html
-load 615015-1.html
+asserts(6) load 615015-1.html # Bug 439258
 load 615450-1.html
diff --git a/editor/libeditor/text/crashtests/crashtests.list b/editor/libeditor/text/crashtests/crashtests.list
index 77fa4db9d933..b33a8c8f4f1a 100644
--- a/editor/libeditor/text/crashtests/crashtests.list
+++ b/editor/libeditor/text/crashtests/crashtests.list
@@ -1,2 +1,2 @@
 load 403965-1.xhtml
-load 580151-1.xhtml
+asserts(6) load 580151-1.xhtml # Bug 439258
diff --git a/layout/base/crashtests/crashtests.list b/layout/base/crashtests/crashtests.list
index 92b38adea9dc..def36c052ae1 100644
--- a/layout/base/crashtests/crashtests.list
+++ b/layout/base/crashtests/crashtests.list
@@ -257,9 +257,9 @@ load 471594-1.xhtml
 load 479114-1.html
 load 477333-1.xhtml
 load 477731-1.html
-load 479360-1.xhtml
+asserts(6) load 479360-1.xhtml # Bug 439258
 load 481806-1.html
-load 483604-1.xhtml
+asserts(6) load 483604-1.xhtml # Bug 439258
 load 485501-1.html
 load 487544-1.html
 load 488390-1.xhtml
diff --git a/layout/generic/crashtests/crashtests.list b/layout/generic/crashtests/crashtests.list
index f700feac4c9f..f8a224451829 100644
--- a/layout/generic/crashtests/crashtests.list
+++ b/layout/generic/crashtests/crashtests.list
@@ -184,7 +184,7 @@ load 413582-1.xhtml
 load 413582-2.html
 load 413712-1.xhtml
 load 414061-1.html
-load 414180-1.xul
+asserts(6) load 414180-1.xul # Bug 439258
 load 414719-1.html
 load 415685-1.html
 load 416264-1.html
@@ -336,7 +336,7 @@ asserts(1) load 571975-1.html # bug 574889
 load 574958.xhtml
 load 580504-1.xhtml
 load 585598-1.xhtml
-load 586806-1.html
+asserts(11) load 586806-1.html # Bug 439258
 load 586806-2.html
 load 586806-3.html
 load 586973-1.html