diff --git a/HISTORY.md b/HISTORY.md
index 4b47a69..a2e8722 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -3,6 +3,11 @@
 https://github.com/josdejong/jsoneditor
 
 
+## not yet released, version 5.1.3
+
+- Fixed #264: Clicking items in the context menu not working on Firefox.
+
+
 ## 2016-01-21, version 5.1.2
 
 - Improvements in sanitizing invalid JSON.
diff --git a/src/js/ContextMenu.js b/src/js/ContextMenu.js
index 412b5c4..683c614 100644
--- a/src/js/ContextMenu.js
+++ b/src/js/ContextMenu.js
@@ -72,7 +72,7 @@ function ContextMenu (items, options) {
           button.title = item.title;
         }
         if (item.click) {
-          button.onclick = function () {
+          button.onclick = function (event) {
             event.preventDefault();
             me.hide();
             item.click();