diff --git a/widget/src/cocoa/crashtests/444260-1.xul b/widget/src/cocoa/crashtests/444260-1.xul
new file mode 100644
index 00000000000..f1a84023df6
--- /dev/null
+++ b/widget/src/cocoa/crashtests/444260-1.xul
@@ -0,0 +1,3 @@
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+<hbox><button width="7788025414616">S</button></hbox>
+</window>
diff --git a/widget/src/cocoa/crashtests/444864-1.html b/widget/src/cocoa/crashtests/444864-1.html
new file mode 100644
index 00000000000..f8bac76e6a0
--- /dev/null
+++ b/widget/src/cocoa/crashtests/444864-1.html
@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<html>
+<body>
+<div style="padding: 10px;"><input type="button" value="Go" style="letter-spacing: 331989pt;"></div>
+</body>
+</html>
diff --git a/widget/src/cocoa/crashtests/449111-1.html b/widget/src/cocoa/crashtests/449111-1.html
new file mode 100644
index 00000000000..44945918032
--- /dev/null
+++ b/widget/src/cocoa/crashtests/449111-1.html
@@ -0,0 +1,4 @@
+<html>
+<head></head>
+<body><div style="display: -moz-box; word-spacing: 549755813889px;"><button>T </button></div></body>
+</html>
diff --git a/widget/src/cocoa/crashtests/crashtests.list b/widget/src/cocoa/crashtests/crashtests.list
index 91ff687d6fd..3f2cf1bd149 100644
--- a/widget/src/cocoa/crashtests/crashtests.list
+++ b/widget/src/cocoa/crashtests/crashtests.list
@@ -1,3 +1,6 @@
 load 397209-1.html
 load 403296-1.xhtml
 load 419737-1.html
+load 444260-1.xul
+load 444864-1.html
+load 449111-1.html
