diff -r 000000000000 -r 6474c204b198 browser/devtools/webconsole/test/browser_console_nsiconsolemessage.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/webconsole/test/browser_console_nsiconsolemessage.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,80 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+// Check that nsIConsoleMessages are displayed in the Browser Console.
+// See bug 859756.
+
+const TEST_URI = "data:text/html;charset=utf8,<title>bug859756</title>\n" +
+                 "<p>hello world\n<p>nsIConsoleMessages ftw!";
+
+function test()
+{
+  const FILTER_PREF = "devtools.browserconsole.filter.jslog";
+  Services.prefs.setBoolPref(FILTER_PREF, true);
+
+  registerCleanupFunction(() => {
+    Services.prefs.clearUserPref(FILTER_PREF);
+  });
+
+  Task.spawn(function*() {
+    const {tab} = yield loadTab(TEST_URI);
+
+    // Test for cached nsIConsoleMessages.
+    Services.console.logStringMessage("test1 for bug859756");
+
+    info("open web console");
+    let hud = yield openConsole(tab);
+
+    ok(hud, "web console opened");
+    Services.console.logStringMessage("do-not-show-me");
+    content.console.log("foobarz");
+
+    yield waitForMessages({
+      webconsole: hud,
+      messages: [{
+        text: "foobarz",
+        category: CATEGORY_WEBDEV,
+        severity: SEVERITY_LOG,
+      }],
+    });
+
+    let text = hud.outputNode.textContent;
+    is(text.indexOf("do-not-show-me"), -1,
+       "nsIConsoleMessages are not displayed");
+    is(text.indexOf("test1 for bug859756"), -1,
+       "nsIConsoleMessages are not displayed (confirmed)");
+
+    yield closeConsole(tab);
+
+    info("web console closed");
+    hud = yield HUDService.toggleBrowserConsole();
+    ok(hud, "browser console opened");
+
+    Services.console.logStringMessage("test2 for bug859756");
+
+    let results = yield waitForMessages({
+      webconsole: hud,
+      messages: [{
+        text: "test1 for bug859756",
+        category: CATEGORY_JS,
+      }, {
+        text: "test2 for bug859756",
+        category: CATEGORY_JS,
+      }, {
+        text: "do-not-show-me",
+        category: CATEGORY_JS,
+      }],
+    });
+
+    let msg = [...results[2].matched][0];
+    ok(msg, "message element for do-not-show-me (nsIConsoleMessage)");
+    isnot(msg.textContent.indexOf("do-not-show"), -1, "element content is correct");
+    ok(!msg.classList.contains("filtered-by-type"), "element is not filtered");
+
+    hud.setFilterState("jslog", false);
+
+    ok(msg.classList.contains("filtered-by-type"), "element is filtered");
+  }).then(finishTest);
+}