diff -r 000000000000 -r 6474c204b198 browser/base/content/test/general/browser_bug409481.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/general/browser_bug409481.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,83 @@
+function test() {
+  waitForExplicitFinish();
+
+  // XXX This looks a bit odd, but is needed to avoid throwing when removing the
+  // event listeners below. See bug 310955.
+  document.getElementById("sidebar").addEventListener("load", delayedOpenUrl, true);
+  toggleSidebar("viewWebPanelsSidebar", true);
+}
+
+function delayedOpenUrl() {
+  ok(true, "Ran delayedOpenUrl");
+  setTimeout(openPanelUrl, 100);
+}
+
+function openPanelUrl(event) {
+  ok(!document.getElementById("sidebar-box").hidden, "Sidebar showing");
+
+  var sidebar = document.getElementById("sidebar");
+  var root = sidebar.contentDocument.documentElement;
+  ok(root.nodeName != "parsererror", "Sidebar is well formed");
+
+  sidebar.removeEventListener("load", delayedOpenUrl, true);
+  // XXX See comment above
+  sidebar.contentDocument.addEventListener("load", delayedRunTest, true);
+  var url = 'data:text/html,<div%20id="test_bug409481">Content!</div><a id="link" href="http://www.example.com/ctest">Link</a><input id="textbox">';
+  sidebar.contentWindow.loadWebPanel(url);
+}
+
+function delayedRunTest() {
+  ok(true, "Ran delayedRunTest");
+  setTimeout(runTest, 100);
+}
+
+function runTest(event) {
+  var sidebar = document.getElementById("sidebar");
+  sidebar.contentDocument.removeEventListener("load", delayedRunTest, true);
+
+  var browser = sidebar.contentDocument.getElementById("web-panels-browser");
+  var div = browser && browser.contentDocument.getElementById("test_bug409481");
+  ok(div && div.textContent == "Content!", "Sidebar content loaded");
+
+  var link = browser && browser.contentDocument.getElementById("link");
+  sidebar.contentDocument.addEventListener("popupshown", contextMenuOpened, false);
+
+  EventUtils.synthesizeMouseAtCenter(link, { type: "contextmenu", button: 2 }, browser.contentWindow);
+}
+
+function contextMenuOpened()
+{
+  var sidebar = document.getElementById("sidebar");
+  sidebar.contentDocument.removeEventListener("popupshown", contextMenuOpened, false);
+
+  var copyLinkCommand = sidebar.contentDocument.getElementById("context-copylink");
+  copyLinkCommand.addEventListener("command", copyLinkCommandExecuted, false);
+  copyLinkCommand.doCommand();
+}
+
+function copyLinkCommandExecuted(event)
+{
+  event.target.removeEventListener("command", copyLinkCommandExecuted, false);
+
+  var sidebar = document.getElementById("sidebar");
+  var browser = sidebar.contentDocument.getElementById("web-panels-browser");
+  var textbox = browser && browser.contentDocument.getElementById("textbox");
+  textbox.focus();
+  document.commandDispatcher.getControllerForCommand("cmd_paste").doCommand("cmd_paste");
+  is(textbox.value, "http://www.example.com/ctest", "copy link command");
+
+  sidebar.contentDocument.addEventListener("popuphidden", contextMenuClosed, false);
+  event.target.parentNode.hidePopup();
+}
+
+function contextMenuClosed()
+{
+  var sidebar = document.getElementById("sidebar");
+  sidebar.contentDocument.removeEventListener("popuphidden", contextMenuClosed, false);
+
+  toggleSidebar("viewWebPanelsSidebar");
+
+  ok(document.getElementById("sidebar-box").hidden, "Sidebar successfully hidden");
+
+  finish();
+}