diff --git a/browser/devtools/debugger/test/browser_dbg_breakpoints-contextmenu.js b/browser/devtools/debugger/test/browser_dbg_breakpoints-contextmenu.js
index 2b8139dd35b3..9cf0d01d1c55 100644
--- a/browser/devtools/debugger/test/browser_dbg_breakpoints-contextmenu.js
+++ b/browser/devtools/debugger/test/browser_dbg_breakpoints-contextmenu.js
@@ -101,7 +101,7 @@ function test() {
     return finished;
   }
 
-  function initialChecks() {
+  let initialChecks = Task.async(function*() {
     for (let source of gSources) {
       for (let breakpoint of source) {
         ok(gBreakpoints._getAdded(breakpoint.attachment),
@@ -118,6 +118,17 @@ function test() {
         let enableSelfId = prefix + "enableSelf-" + identifier + "-menuitem";
         let disableSelfId = prefix + "disableSelf-" + identifier + "-menuitem";
 
+        // Check to make sure that only the bp context menu is shown when right clicking
+        // this node (Bug 1159276).
+        let menu = gDebugger.document.getElementById("bp-mPop-" + identifier);
+        let contextMenuShown = once(gDebugger.document, "popupshown");
+        EventUtils.synthesizeMouseAtCenter(breakpoint.prebuiltNode, {type: 'contextmenu', button: 2}, gDebugger);
+        let event = yield contextMenuShown;
+        is (event.originalTarget.id, menu.id, "The correct context menu was shown");
+        let contextMenuHidden = once(gDebugger.document, "popuphidden");
+        menu.hidePopup();
+        yield contextMenuHidden;
+
         is(gDebugger.document.getElementById(enableSelfId).getAttribute("hidden"), "true",
           "The 'Enable breakpoint' context menu item should initially be hidden'.");
         ok(!gDebugger.document.getElementById(disableSelfId).hasAttribute("hidden"),
@@ -126,7 +137,7 @@ function test() {
           "All breakpoints should initially have a checked checkbox.");
       }
     }
-  }
+  });
 
   function checkBreakpointToggleSelf(aIndex) {
     let deferred = promise.defer();
diff --git a/browser/devtools/shared/widgets/SideMenuWidget.jsm b/browser/devtools/shared/widgets/SideMenuWidget.jsm
index 6e13b46073a5..16204131d674 100644
--- a/browser/devtools/shared/widgets/SideMenuWidget.jsm
+++ b/browser/devtools/shared/widgets/SideMenuWidget.jsm
@@ -400,6 +400,15 @@ SideMenuWidget.prototype = {
       return;
     }
 
+    // Don't show the menu if a descendant node is going to be visible also.
+    let node = e.originalTarget;
+    while (node && node !== this._list) {
+      if (node.hasAttribute("contextmenu")) {
+        return;
+      }
+      node = node.parentNode;
+    }
+
     this._contextMenu.openPopupAtScreen(e.screenX, e.screenY, true);
   },