diff -r 000000000000 -r 6474c204b198 browser/devtools/webconsole/test/browser_webconsole_output_copy_newlines.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/webconsole/test/browser_webconsole_output_copy_newlines.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,77 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that multiple messages are copied into the clipboard and that they are
+// separated by new lines. See bug 916997.
+
+function test()
+{
+  const TEST_URI = "data:text/html;charset=utf8,<p>hello world, bug 916997";
+  let clipboardValue = "";
+
+  addTab(TEST_URI);
+  browser.addEventListener("load", function onLoad() {
+    browser.removeEventListener("load", onLoad, true);
+    openConsole(null, consoleOpened);
+  }, true);
+
+  function consoleOpened(hud)
+  {
+    hud.jsterm.clearOutput();
+
+    let controller = top.document.commandDispatcher.
+                     getControllerForCommand("cmd_copy");
+    is(controller.isCommandEnabled("cmd_copy"), false, "cmd_copy is disabled");
+
+    content.console.log("Hello world! bug916997a");
+    content.console.log("Hello world 2! bug916997b");
+
+    waitForMessages({
+      webconsole: hud,
+      messages: [{
+        text: "Hello world! bug916997a",
+        category: CATEGORY_WEBDEV,
+        severity: SEVERITY_LOG,
+      }, {
+        text: "Hello world 2! bug916997b",
+        category: CATEGORY_WEBDEV,
+        severity: SEVERITY_LOG,
+      }],
+    }).then(() => {
+      hud.ui.output.selectAllMessages();
+      hud.outputNode.focus();
+
+      goUpdateCommand("cmd_copy");
+      controller = top.document.commandDispatcher.getControllerForCommand("cmd_copy");
+      is(controller.isCommandEnabled("cmd_copy"), true, "cmd_copy is enabled");
+
+      let selection = hud.iframeWindow.getSelection() + "";
+      info("selection '" + selection + "'");
+      waitForClipboard((str) => {
+          clipboardValue = str;
+          return str.indexOf("bug916997a") > -1 && str.indexOf("bug916997b") > -1;
+        },
+        () => { goDoCommand("cmd_copy"); },
+        checkClipboard.bind(null, hud),
+        () => {
+          info("last clipboard value: '" + clipboardValue + "'");
+          finishTest();
+        });
+    });
+  }
+
+  function checkClipboard(hud)
+  {
+    info("clipboard value '" + clipboardValue + "'");
+    let lines = clipboardValue.trim().split("\n");
+    is(hud.outputNode.children.length, 2, "number of messages");
+    is(lines.length, hud.outputNode.children.length, "number of lines");
+    isnot(lines[0].indexOf("bug916997a"), -1,
+          "first message text includes 'bug916997a'");
+    isnot(lines[1].indexOf("bug916997b"), -1,
+          "second message text includes 'bug916997b'");
+    is(lines[0].indexOf("bug916997b"), -1,
+       "first message text does not include 'bug916997b'");
+    finishTest();
+  }
+}