diff -r 000000000000 -r 6474c204b198 browser/devtools/styleeditor/test/browser_styleeditor_reload.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleeditor/test/browser_styleeditor_reload.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,94 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+const NEW_URI = TEST_BASE_HTTPS + "media.html";
+
+const LINE_NO = 5;
+const COL_NO = 3;
+
+let gContentWin;
+let gUI;
+
+function test()
+{
+  waitForExplicitFinish();
+
+  addTabAndOpenStyleEditors(2, function(panel) {
+    gContentWin = gBrowser.selectedTab.linkedBrowser.contentWindow.wrappedJSObject;
+    gUI = panel.UI;
+    gUI.editors[0].getSourceEditor().then(runTests);
+  });
+
+  content.location = TESTCASE_URI;
+}
+
+function runTests()
+{
+  let count = 0;
+  gUI.once("editor-selected", (event, editor) => {
+    editor.getSourceEditor().then(() => {
+      info("selected second editor, about to reload page");
+      reloadPage();
+
+      gUI.on("editor-added", function editorAdded(event, editor) {
+        if (++count == 2) {
+          info("all editors added after reload");
+          gUI.off("editor-added", editorAdded);
+          gUI.editors[1].getSourceEditor().then(testRemembered);
+        }
+      })
+    });
+  });
+  gUI.selectStyleSheet(gUI.editors[1].styleSheet.href, LINE_NO, COL_NO);
+}
+
+function testRemembered()
+{
+  is(gUI.selectedEditor, gUI.editors[1], "second editor is selected");
+
+  let {line, ch} = gUI.selectedEditor.sourceEditor.getCursor();
+  is(line, LINE_NO, "correct line selected");
+  is(ch, COL_NO, "correct column selected");
+
+  testNewPage();
+}
+
+function testNewPage()
+{
+  let count = 0;
+  gUI.on("editor-added", function editorAdded(event, editor) {
+    info("editor added here")
+    if (++count == 2) {
+      info("all editors added after navigating page");
+      gUI.off("editor-added", editorAdded);
+      gUI.editors[0].getSourceEditor().then(testNotRemembered);
+    }
+  })
+
+  info("navigating to a different page");
+  navigatePage();
+}
+
+function testNotRemembered()
+{
+  is(gUI.selectedEditor, gUI.editors[0], "first editor is selected");
+
+  let {line, ch} = gUI.selectedEditor.sourceEditor.getCursor();
+  is(line, 0, "first line is selected");
+  is(ch, 0, "first column is selected");
+
+  gUI = null;
+  finish();
+}
+
+function reloadPage()
+{
+  gContentWin.location.reload();
+}
+
+function navigatePage()
+{
+  gContentWin.location = NEW_URI;
+}