diff --git a/toolkit/components/apppicker/content/appPicker.xhtml b/toolkit/components/apppicker/content/appPicker.xhtml
index ce8536ec487c..e4848cd31358 100644
--- a/toolkit/components/apppicker/content/appPicker.xhtml
+++ b/toolkit/components/apppicker/content/appPicker.xhtml
@@ -17,7 +17,7 @@
   <dialog id="app-picker"
     buttons="accept,cancel,extra2"
     buttonlabelextra2="&BrowseButton.label;"
-    defaultButton="cancel">
+    defaultButton="accept">
 
     <script src="chrome://global/content/appPicker.js"/>