Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

129 files changed, 14222 insertions, 0 deletions

diff --git a/devtools/client/styleeditor/StyleEditorUI.sys.mjs b/devtools/client/styleeditor/StyleEditorUI.sys.mjs
new file mode 100644
index 0000000000..dc9b8ab3b5
--- /dev/null
+++ b/devtools/client/styleeditor/StyleEditorUI.sys.mjs
@@ -0,0 +1,1761 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import {
+  loader,
+  require,
+} from "resource://devtools/shared/loader/Loader.sys.mjs";
+
+const EventEmitter = require("resource://devtools/shared/event-emitter.js");
+
+import {
+  getString,
+  text,
+  showFilePicker,
+  optionsPopupMenu,
+} from "resource://devtools/client/styleeditor/StyleEditorUtil.sys.mjs";
+import { StyleSheetEditor } from "resource://devtools/client/styleeditor/StyleSheetEditor.sys.mjs";
+
+const { PluralForm } = require("resource://devtools/shared/plural-form.js");
+const { PrefObserver } = require("resource://devtools/client/shared/prefs.js");
+
+const KeyShortcuts = require("resource://devtools/client/shared/key-shortcuts.js");
+
+const lazy = {};
+
+loader.lazyRequireGetter(
+  lazy,
+  "KeyCodes",
+  "resource://devtools/client/shared/keycodes.js",
+  true
+);
+
+loader.lazyRequireGetter(
+  lazy,
+  "OriginalSource",
+  "resource://devtools/client/styleeditor/original-source.js",
+  true
+);
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  FileUtils: "resource://gre/modules/FileUtils.sys.mjs",
+});
+ChromeUtils.defineModuleGetter(
+  lazy,
+  "NetUtil",
+  "resource://gre/modules/NetUtil.jsm"
+);
+loader.lazyRequireGetter(
+  lazy,
+  "ResponsiveUIManager",
+  "resource://devtools/client/responsive/manager.js"
+);
+loader.lazyRequireGetter(
+  lazy,
+  "openContentLink",
+  "resource://devtools/client/shared/link.js",
+  true
+);
+loader.lazyRequireGetter(
+  lazy,
+  "copyString",
+  "resource://devtools/shared/platform/clipboard.js",
+  true
+);
+
+const LOAD_ERROR = "error-load";
+const PREF_AT_RULES_SIDEBAR = "devtools.styleeditor.showAtRulesSidebar";
+const PREF_SIDEBAR_WIDTH = "devtools.styleeditor.atRulesSidebarWidth";
+const PREF_NAV_WIDTH = "devtools.styleeditor.navSidebarWidth";
+const PREF_ORIG_SOURCES = "devtools.source-map.client-service.enabled";
+
+const FILTERED_CLASSNAME = "splitview-filtered";
+const ALL_FILTERED_CLASSNAME = "splitview-all-filtered";
+
+const HTML_NS = "http://www.w3.org/1999/xhtml";
+
+/**
+ * StyleEditorUI is controls and builds the UI of the Style Editor, including
+ * maintaining a list of editors for each stylesheet on a debuggee.
+ *
+ * Emits events:
+ *   'editor-added': A new editor was added to the UI
+ *   'editor-selected': An editor was selected
+ *   'error': An error occured
+ *
+ */
+export class StyleEditorUI extends EventEmitter {
+  #activeSummary = null;
+  #commands;
+  #contextMenu;
+  #contextMenuStyleSheet;
+  #copyUrlItem;
+  #cssProperties;
+  #filter;
+  #filterInput;
+  #filterInputClearButton;
+  #loadingStyleSheets;
+  #nav;
+  #openLinkNewTabItem;
+  #optionsButton;
+  #optionsMenu;
+  #panelDoc;
+  #prefObserver;
+  #root;
+  #seenSheets = new Map();
+  #shortcuts;
+  #side;
+  #sourceMapPrefObserver;
+  #styleSheetBoundToSelect;
+  #styleSheetToSelect;
+  /**
+   * Maps keyed by summary element whose value is an object containing:
+   * - {Element} details: The associated details element (i.e. container for CodeMirror)
+   * - {StyleSheetEditor} editor: The associated editor, for easy retrieval
+   */
+  #summaryDataMap = new WeakMap();
+  #toolbox;
+  #tplDetails;
+  #tplSummary;
+  #uiAbortController = new AbortController();
+  #window;
+
+  /**
+   * @param {Toolbox} toolbox
+   * @param {Object} commands Object defined from devtools/shared/commands to interact with the devtools backend
+   * @param {Document} panelDoc
+   *        Document of the toolbox panel to populate UI in.
+   * @param {CssProperties} A css properties database.
+   */
+  constructor(toolbox, commands, panelDoc, cssProperties) {
+    super();
+
+    this.#toolbox = toolbox;
+    this.#commands = commands;
+    this.#panelDoc = panelDoc;
+    this.#cssProperties = cssProperties;
+    this.#window = this.#panelDoc.defaultView;
+    this.#root = this.#panelDoc.getElementById("style-editor-chrome");
+
+    this.editors = [];
+    this.selectedEditor = null;
+    this.savedLocations = {};
+
+    this.#prefObserver = new PrefObserver("devtools.styleeditor.");
+    this.#prefObserver.on(
+      PREF_AT_RULES_SIDEBAR,
+      this.#onAtRulesSidebarPrefChanged
+    );
+    this.#sourceMapPrefObserver = new PrefObserver(
+      "devtools.source-map.client-service."
+    );
+    this.#sourceMapPrefObserver.on(
+      PREF_ORIG_SOURCES,
+      this.#onOrigSourcesPrefChanged
+    );
+  }
+
+  get cssProperties() {
+    return this.#cssProperties;
+  }
+
+  get currentTarget() {
+    return this.#commands.targetCommand.targetFront;
+  }
+
+  /*
+   * Index of selected stylesheet in document.styleSheets
+   */
+  get selectedStyleSheetIndex() {
+    return this.selectedEditor
+      ? this.selectedEditor.styleSheet.styleSheetIndex
+      : -1;
+  }
+
+  /**
+   * Initiates the style editor ui creation, and start to track TargetCommand updates.
+   *
+   * @params {Object} options
+   * @params {Object} options.stylesheetToSelect
+   * @params {StyleSheetResource} options.stylesheetToSelect.stylesheet
+   * @params {Integer} options.stylesheetToSelect.line
+   * @params {Integer} options.stylesheetToSelect.column
+   */
+  async initialize(options = {}) {
+    this.createUI();
+
+    if (options.stylesheetToSelect) {
+      const { stylesheet, line, column } = options.stylesheetToSelect;
+      // If a stylesheet resource and its location was passed (e.g. user clicked on a stylesheet
+      // location in the rule view), we can directly add it to the list and select it
+      // before watching for resources, for improved performance.
+      if (stylesheet.resourceId) {
+        try {
+          await this.#handleStyleSheetResource(stylesheet);
+          await this.selectStyleSheet(
+            stylesheet,
+            line - 1,
+            column ? column - 1 : 0
+          );
+        } catch (e) {
+          console.error(e);
+        }
+      }
+    }
+
+    await this.#toolbox.resourceCommand.watchResources(
+      [this.#toolbox.resourceCommand.TYPES.DOCUMENT_EVENT],
+      { onAvailable: this.#onResourceAvailable }
+    );
+    await this.#commands.targetCommand.watchTargets({
+      types: [this.#commands.targetCommand.TYPES.FRAME],
+      onAvailable: this.#onTargetAvailable,
+      onDestroyed: this.#onTargetDestroyed,
+    });
+
+    this.#startLoadingStyleSheets();
+    await this.#toolbox.resourceCommand.watchResources(
+      [this.#toolbox.resourceCommand.TYPES.STYLESHEET],
+      {
+        onAvailable: this.#onResourceAvailable,
+        onUpdated: this.#onResourceUpdated,
+      }
+    );
+    await this.#waitForLoadingStyleSheets();
+  }
+
+  /**
+   * Build the initial UI and wire buttons with event handlers.
+   */
+  createUI() {
+    this.#filterInput = this.#root.querySelector(".devtools-filterinput");
+    this.#filterInputClearButton = this.#root.querySelector(
+      ".devtools-searchinput-clear"
+    );
+    this.#nav = this.#root.querySelector(".splitview-nav");
+    this.#side = this.#root.querySelector(".splitview-side-details");
+    this.#tplSummary = this.#root.querySelector(
+      "#splitview-tpl-summary-stylesheet"
+    );
+    this.#tplDetails = this.#root.querySelector(
+      "#splitview-tpl-details-stylesheet"
+    );
+
+    const eventListenersConfig = { signal: this.#uiAbortController.signal };
+
+    // Add click event on the "new stylesheet" button in the toolbar and on the
+    // "append a new stylesheet" link (visible when there are no stylesheets).
+    for (const el of this.#root.querySelectorAll(".style-editor-newButton")) {
+      el.addEventListener(
+        "click",
+        async () => {
+          const stylesheetsFront = await this.currentTarget.getFront(
+            "stylesheets"
+          );
+          stylesheetsFront.addStyleSheet(null);
+          this.#clearFilterInput();
+        },
+        eventListenersConfig
+      );
+    }
+
+    this.#root.querySelector(".style-editor-importButton").addEventListener(
+      "click",
+      () => {
+        this.#importFromFile(this._mockImportFile || null, this.#window);
+        this.#clearFilterInput();
+      },
+      eventListenersConfig
+    );
+
+    this.#root
+      .querySelector("#style-editor-options")
+      .addEventListener(
+        "click",
+        this.#onOptionsButtonClick,
+        eventListenersConfig
+      );
+
+    this.#filterInput.addEventListener(
+      "input",
+      this.#onFilterInputChange,
+      eventListenersConfig
+    );
+
+    this.#filterInputClearButton.addEventListener(
+      "click",
+      () => this.#clearFilterInput(),
+      eventListenersConfig
+    );
+
+    this.#panelDoc.addEventListener(
+      "contextmenu",
+      () => {
+        this.#contextMenuStyleSheet = null;
+      },
+      { ...eventListenersConfig, capture: true }
+    );
+
+    this.#optionsButton = this.#panelDoc.getElementById("style-editor-options");
+
+    this.#contextMenu = this.#panelDoc.getElementById("sidebar-context");
+    this.#contextMenu.addEventListener(
+      "popupshowing",
+      this.#updateContextMenuItems,
+      eventListenersConfig
+    );
+
+    this.#openLinkNewTabItem = this.#panelDoc.getElementById(
+      "context-openlinknewtab"
+    );
+    this.#openLinkNewTabItem.addEventListener(
+      "command",
+      this.#openLinkNewTab,
+      eventListenersConfig
+    );
+
+    this.#copyUrlItem = this.#panelDoc.getElementById("context-copyurl");
+    this.#copyUrlItem.addEventListener(
+      "command",
+      this.#copyUrl,
+      eventListenersConfig
+    );
+
+    // items list focus and search-on-type handling
+    this.#nav.addEventListener(
+      "keydown",
+      this.#onNavKeyDown,
+      eventListenersConfig
+    );
+
+    this.#shortcuts = new KeyShortcuts({
+      window: this.#window,
+    });
+    this.#shortcuts.on(
+      `CmdOrCtrl+${getString("focusFilterInput.commandkey")}`,
+      this.#onFocusFilterInputKeyboardShortcut
+    );
+
+    const nav = this.#panelDoc.querySelector(".splitview-controller");
+    nav.style.width = Services.prefs.getIntPref(PREF_NAV_WIDTH) + "px";
+  }
+
+  #clearFilterInput() {
+    this.#filterInput.value = "";
+    this.#onFilterInputChange();
+  }
+
+  #onFilterInputChange = () => {
+    this.#filter = this.#filterInput.value;
+    this.#filterInputClearButton.toggleAttribute("hidden", !this.#filter);
+
+    for (const summary of this.#nav.childNodes) {
+      // Don't update nav class for every element, we do it after the loop.
+      this.handleSummaryVisibility(summary, {
+        triggerOnFilterStateChange: false,
+      });
+    }
+
+    this.#onFilterStateChange();
+
+    if (this.#activeSummary == null) {
+      const firstVisibleSummary = Array.from(this.#nav.childNodes).find(
+        node => !node.classList.contains(FILTERED_CLASSNAME)
+      );
+
+      if (firstVisibleSummary) {
+        this.setActiveSummary(firstVisibleSummary, { reason: "filter-auto" });
+      }
+    }
+  };
+
+  #onFilterStateChange() {
+    const summaries = Array.from(this.#nav.childNodes);
+    const hasVisibleSummary = summaries.some(
+      node => !node.classList.contains(FILTERED_CLASSNAME)
+    );
+    const allFiltered = !!summaries.length && !hasVisibleSummary;
+
+    this.#nav.classList.toggle(ALL_FILTERED_CLASSNAME, allFiltered);
+
+    this.#filterInput
+      .closest(".devtools-searchbox")
+      .classList.toggle("devtools-searchbox-no-match", !!allFiltered);
+  }
+
+  #onFocusFilterInputKeyboardShortcut = e => {
+    // Prevent the print modal to be displayed.
+    if (e) {
+      e.stopPropagation();
+      e.preventDefault();
+    }
+    this.#filterInput.select();
+  };
+
+  #onNavKeyDown = event => {
+    function getFocusedItemWithin(nav) {
+      let node = nav.ownerDocument.activeElement;
+      while (node && node.parentNode != nav) {
+        node = node.parentNode;
+      }
+      return node;
+    }
+
+    // do not steal focus from inside iframes or textboxes
+    if (
+      event.target.ownerDocument != this.#nav.ownerDocument ||
+      event.target.tagName == "input" ||
+      event.target.tagName == "textarea" ||
+      event.target.classList.contains("textbox")
+    ) {
+      return false;
+    }
+
+    // handle keyboard navigation within the items list
+    const visibleElements = Array.from(
+      this.#nav.querySelectorAll(`li:not(.${FILTERED_CLASSNAME})`)
+    );
+    // Elements have a different visual order (due to the use of order), so
+    // we need to sort them by their data-ordinal attribute
+    visibleElements.sort(
+      (a, b) => a.getAttribute("data-ordinal") - b.getAttribute("data-ordinal")
+    );
+
+    let elementToFocus;
+    if (
+      event.keyCode == lazy.KeyCodes.DOM_VK_PAGE_UP ||
+      event.keyCode == lazy.KeyCodes.DOM_VK_HOME
+    ) {
+      elementToFocus = visibleElements[0];
+    } else if (
+      event.keyCode == lazy.KeyCodes.DOM_VK_PAGE_DOWN ||
+      event.keyCode == lazy.KeyCodes.DOM_VK_END
+    ) {
+      elementToFocus = visibleElements.at(-1);
+    } else if (event.keyCode == lazy.KeyCodes.DOM_VK_UP) {
+      const focusedIndex = visibleElements.indexOf(
+        getFocusedItemWithin(this.#nav)
+      );
+      elementToFocus = visibleElements[focusedIndex - 1];
+    } else if (event.keyCode == lazy.KeyCodes.DOM_VK_DOWN) {
+      const focusedIndex = visibleElements.indexOf(
+        getFocusedItemWithin(this.#nav)
+      );
+      elementToFocus = visibleElements[focusedIndex + 1];
+    }
+
+    if (elementToFocus !== undefined) {
+      event.stopPropagation();
+      event.preventDefault();
+      elementToFocus.focus();
+      return false;
+    }
+
+    return true;
+  };
+
+  /**
+   * Opens the Options Popup Menu
+   *
+   * @params {number} screenX
+   * @params {number} screenY
+   *   Both obtained from the event object, used to position the popup
+   */
+  #onOptionsButtonClick = ({ screenX, screenY }) => {
+    this.#optionsMenu = optionsPopupMenu(
+      this.#toggleOrigSources,
+      this.#toggleAtRulesSidebar
+    );
+
+    this.#optionsMenu.once("open", () => {
+      this.#optionsButton.setAttribute("open", true);
+    });
+    this.#optionsMenu.once("close", () => {
+      this.#optionsButton.removeAttribute("open");
+    });
+
+    this.#optionsMenu.popup(screenX, screenY, this.#toolbox.doc);
+  };
+
+  /**
+   * Be called when changing the original sources pref.
+   */
+  #onOrigSourcesPrefChanged = async () => {
+    this.#clear();
+    // When we toggle the source-map preference, we clear the panel and re-fetch the exact
+    // same stylesheet resources from ResourceCommand, but `_addStyleSheet` will trigger
+    // or ignore the additional source-map mapping.
+    this.#root.classList.add("loading");
+    for (const resource of this.#toolbox.resourceCommand.getAllResources(
+      this.#toolbox.resourceCommand.TYPES.STYLESHEET
+    )) {
+      await this.#handleStyleSheetResource(resource);
+    }
+
+    this.#root.classList.remove("loading");
+
+    this.emit("stylesheets-refreshed");
+  };
+
+  /**
+   * Remove all editors and add loading indicator.
+   */
+  #clear = () => {
+    // remember selected sheet and line number for next load
+    if (this.selectedEditor && this.selectedEditor.sourceEditor) {
+      const href = this.selectedEditor.styleSheet.href;
+      const { line, ch } = this.selectedEditor.sourceEditor.getCursor();
+
+      this.#styleSheetToSelect = {
+        stylesheet: href,
+        line,
+        col: ch,
+      };
+    }
+
+    // remember saved file locations
+    for (const editor of this.editors) {
+      if (editor.savedFile) {
+        const identifier = this.getStyleSheetIdentifier(editor.styleSheet);
+        this.savedLocations[identifier] = editor.savedFile;
+      }
+    }
+
+    this.#clearStyleSheetEditors();
+    // Clear the left sidebar items and their associated elements.
+    while (this.#nav.hasChildNodes()) {
+      this.removeSplitViewItem(this.#nav.firstChild);
+    }
+
+    this.selectedEditor = null;
+    // Here the keys are style sheet actors, and the values are
+    // promises that resolve to the sheet's editor.  See |_addStyleSheet|.
+    this.#seenSheets = new Map();
+
+    this.emit("stylesheets-clear");
+  };
+
+  /**
+   * Add an editor for this stylesheet. Add editors for its original sources
+   * instead (e.g. Sass sources), if applicable.
+   *
+   * @param  {Resource} resource
+   *         The STYLESHEET resource which is received from resource command.
+   * @return {Promise}
+   *         A promise that resolves to the style sheet's editor when the style sheet has
+   *         been fully loaded.  If the style sheet has a source map, and source mapping
+   *         is enabled, then the promise resolves to null.
+   */
+  #addStyleSheet(resource) {
+    if (!this.#seenSheets.has(resource)) {
+      const promise = (async () => {
+        let editor = await this.#addStyleSheetEditor(resource);
+
+        const sourceMapLoader = this.#toolbox.sourceMapLoader;
+
+        if (
+          !sourceMapLoader ||
+          !Services.prefs.getBoolPref(PREF_ORIG_SOURCES)
+        ) {
+          return editor;
+        }
+
+        const {
+          href,
+          nodeHref,
+          resourceId: id,
+          sourceMapURL,
+          sourceMapBaseURL,
+        } = resource;
+        const sources = await sourceMapLoader.getOriginalURLs({
+          id,
+          url: href || nodeHref,
+          sourceMapBaseURL,
+          sourceMapURL,
+        });
+        // A single generated sheet might map to multiple original
+        // sheets, so make editors for each of them.
+        if (sources && sources.length) {
+          const parentEditorName = editor.friendlyName;
+          this.#removeStyleSheetEditor(editor);
+          editor = null;
+
+          for (const { id: originalId, url: originalURL } of sources) {
+            const original = new lazy.OriginalSource(
+              originalURL,
+              originalId,
+              sourceMapLoader
+            );
+
+            // set so the first sheet will be selected, even if it's a source
+            original.styleSheetIndex = resource.styleSheetIndex;
+            original.relatedStyleSheet = resource;
+            original.relatedEditorName = parentEditorName;
+            original.resourceId = resource.resourceId;
+            original.targetFront = resource.targetFront;
+            original.atRules = resource.atRules;
+            await this.#addStyleSheetEditor(original);
+          }
+        }
+
+        return editor;
+      })();
+      this.#seenSheets.set(resource, promise);
+    }
+    return this.#seenSheets.get(resource);
+  }
+
+  #removeStyleSheet(resource, editor) {
+    this.#seenSheets.delete(resource);
+    this.#removeStyleSheetEditor(editor);
+  }
+
+  #getInlineStyleSheetsCount() {
+    return this.editors.filter(editor => !editor.styleSheet.href).length;
+  }
+
+  #getNewStyleSheetsCount() {
+    return this.editors.filter(editor => editor.isNew).length;
+  }
+
+  /**
+   * Finds the index to be shown in the Style Editor for inline or
+   * user-created style sheets, returns undefined if not of either type.
+   *
+   * @param {StyleSheet}  styleSheet
+   *        Object representing stylesheet
+   * @return {(Number|undefined)}
+   *         Optional Integer representing the index of the current stylesheet
+   *         among all stylesheets of its type (inline or user-created)
+   */
+  #getNextFriendlyIndex(styleSheet) {
+    if (styleSheet.href) {
+      return undefined;
+    }
+
+    return styleSheet.isNew
+      ? this.#getNewStyleSheetsCount()
+      : this.#getInlineStyleSheetsCount();
+  }
+
+  /**
+   * Add a new editor to the UI for a source.
+   *
+   * @param  {Resource} resource
+   *         The resource which is received from resource command.
+   * @return {Promise} that is resolved with the created StyleSheetEditor when
+   *                   the editor is fully initialized or rejected on error.
+   */
+  async #addStyleSheetEditor(resource) {
+    const editor = new StyleSheetEditor(
+      resource,
+      this.#window,
+      this.#getNextFriendlyIndex(resource)
+    );
+
+    editor.on("property-change", this.#summaryChange.bind(this, editor));
+    editor.on("at-rules-changed", this.#updateAtRulesList.bind(this, editor));
+    editor.on("linked-css-file", this.#summaryChange.bind(this, editor));
+    editor.on("linked-css-file-error", this.#summaryChange.bind(this, editor));
+    editor.on("error", this.#onError);
+    editor.on(
+      "filter-input-keyboard-shortcut",
+      this.#onFocusFilterInputKeyboardShortcut
+    );
+
+    // onAtRulesChanged fires at-rules-changed, so call the function after
+    // registering the listener in order to ensure to get at-rules-changed event.
+    editor.onAtRulesChanged(resource.atRules);
+
+    this.editors.push(editor);
+
+    try {
+      await editor.fetchSource();
+    } catch (e) {
+      // if the editor was destroyed while fetching dependencies, we don't want to go further.
+      if (!this.editors.includes(editor)) {
+        return null;
+      }
+      throw e;
+    }
+
+    this.#sourceLoaded(editor);
+
+    if (resource.fileName) {
+      this.emit("test:editor-updated", editor);
+    }
+
+    return editor;
+  }
+
+  /**
+   * Import a style sheet from file and asynchronously create a
+   * new stylesheet on the debuggee for it.
+   *
+   * @param {mixed} file
+   *        Optional nsIFile or filename string.
+   *        If not set a file picker will be shown.
+   * @param {nsIWindow} parentWindow
+   *        Optional parent window for the file picker.
+   */
+  #importFromFile(file, parentWindow) {
+    const onFileSelected = selectedFile => {
+      if (!selectedFile) {
+        // nothing selected
+        return;
+      }
+      lazy.NetUtil.asyncFetch(
+        {
+          uri: lazy.NetUtil.newURI(selectedFile),
+          loadingNode: this.#window.document,
+          securityFlags:
+            Ci.nsILoadInfo.SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT,
+          contentPolicyType: Ci.nsIContentPolicy.TYPE_OTHER,
+        },
+        async (stream, status) => {
+          if (!Components.isSuccessCode(status)) {
+            this.emit("error", { key: LOAD_ERROR, level: "warning" });
+            return;
+          }
+          const source = lazy.NetUtil.readInputStreamToString(
+            stream,
+            stream.available()
+          );
+          stream.close();
+
+          const stylesheetsFront = await this.currentTarget.getFront(
+            "stylesheets"
+          );
+          stylesheetsFront.addStyleSheet(source, selectedFile.path);
+        }
+      );
+    };
+
+    showFilePicker(file, false, parentWindow, onFileSelected);
+  }
+
+  /**
+   * Forward any error from a stylesheet.
+   *
+   * @param  {data} data
+   *         The event data
+   */
+  #onError = data => {
+    this.emit("error", data);
+  };
+
+  /**
+   * Toggle the original sources pref.
+   */
+  #toggleOrigSources() {
+    const isEnabled = Services.prefs.getBoolPref(PREF_ORIG_SOURCES);
+    Services.prefs.setBoolPref(PREF_ORIG_SOURCES, !isEnabled);
+  }
+
+  /**
+   * Toggle the pref for showing the at-rules sidebar (for @media, @layer, @container, …)
+   * in each editor.
+   */
+  #toggleAtRulesSidebar() {
+    const isEnabled = Services.prefs.getBoolPref(PREF_AT_RULES_SIDEBAR);
+    Services.prefs.setBoolPref(PREF_AT_RULES_SIDEBAR, !isEnabled);
+  }
+
+  /**
+   * Toggle the at-rules sidebar in each editor depending on the setting.
+   */
+  #onAtRulesSidebarPrefChanged = () => {
+    this.editors.forEach(this.#updateAtRulesList);
+  };
+
+  /**
+   * This method handles the following cases related to the context
+   * menu items "_openLinkNewTabItem" and "_copyUrlItem":
+   *
+   * 1) There was a stylesheet clicked on and it is external: show and
+   * enable the context menu item
+   * 2) There was a stylesheet clicked on and it is inline: show and
+   * disable the context menu item
+   * 3) There was no stylesheet clicked on (the right click happened
+   * below the list): hide the context menu
+   */
+  #updateContextMenuItems = async () => {
+    this.#openLinkNewTabItem.hidden = !this.#contextMenuStyleSheet;
+    this.#copyUrlItem.hidden = !this.#contextMenuStyleSheet;
+
+    if (this.#contextMenuStyleSheet) {
+      this.#openLinkNewTabItem.setAttribute(
+        "disabled",
+        !this.#contextMenuStyleSheet.href
+      );
+      this.#copyUrlItem.setAttribute(
+        "disabled",
+        !this.#contextMenuStyleSheet.href
+      );
+    }
+  };
+
+  /**
+   * Open a particular stylesheet in a new tab.
+   */
+  #openLinkNewTab = () => {
+    if (this.#contextMenuStyleSheet) {
+      lazy.openContentLink(this.#contextMenuStyleSheet.href);
+    }
+  };
+
+  /**
+   * Copies a stylesheet's URL.
+   */
+  #copyUrl = () => {
+    if (this.#contextMenuStyleSheet) {
+      lazy.copyString(this.#contextMenuStyleSheet.href);
+    }
+  };
+
+  /**
+   * Remove a particular stylesheet editor from the UI
+   *
+   * @param {StyleSheetEditor}  editor
+   *        The editor to remove.
+   */
+  #removeStyleSheetEditor(editor) {
+    if (editor.summary) {
+      this.removeSplitViewItem(editor.summary);
+    } else {
+      const self = this;
+      this.on("editor-added", function onAdd(added) {
+        if (editor == added) {
+          self.off("editor-added", onAdd);
+          self.removeSplitViewItem(editor.summary);
+        }
+      });
+    }
+
+    editor.destroy();
+    this.editors.splice(this.editors.indexOf(editor), 1);
+  }
+
+  /**
+   * Clear all the editors from the UI.
+   */
+  #clearStyleSheetEditors() {
+    for (const editor of this.editors) {
+      editor.destroy();
+    }
+    this.editors = [];
+  }
+
+  /**
+   * Called when a StyleSheetEditor's source has been fetched.
+   * Add new sidebar item and editor to the UI
+   *
+   * @param  {StyleSheetEditor} editor
+   *         Editor to create UI for.
+   */
+  #sourceLoaded(editor) {
+    // Create the detail and summary nodes from the templates node (declared in index.xhtml)
+    const details = this.#tplDetails.cloneNode(true);
+    details.id = "";
+    const summary = this.#tplSummary.cloneNode(true);
+    summary.id = "";
+
+    let ordinal = editor.styleSheet.styleSheetIndex;
+    ordinal = ordinal == -1 ? Number.MAX_SAFE_INTEGER : ordinal;
+    summary.style.order = ordinal;
+    summary.setAttribute("data-ordinal", ordinal);
+
+    const isSystem = !!editor.styleSheet.system;
+    if (isSystem) {
+      summary.classList.add("stylesheet-system");
+    }
+
+    this.#nav.appendChild(summary);
+    this.#side.appendChild(details);
+
+    this.#summaryDataMap.set(summary, {
+      details,
+      editor,
+    });
+
+    const createdEditor = editor;
+    createdEditor.summary = summary;
+    createdEditor.details = details;
+
+    const eventListenersConfig = { signal: this.#uiAbortController.signal };
+
+    summary.addEventListener(
+      "click",
+      event => {
+        event.stopPropagation();
+        this.setActiveSummary(summary);
+      },
+      eventListenersConfig
+    );
+
+    const stylesheetToggle = summary.querySelector(".stylesheet-toggle");
+    if (isSystem) {
+      stylesheetToggle.disabled = true;
+      this.#window.document.l10n.setAttributes(
+        stylesheetToggle,
+        "styleeditor-visibility-toggle-system"
+      );
+    } else {
+      stylesheetToggle.addEventListener(
+        "click",
+        event => {
+          event.stopPropagation();
+          event.target.blur();
+
+          createdEditor.toggleDisabled();
+        },
+        eventListenersConfig
+      );
+    }
+
+    summary.querySelector(".stylesheet-name").addEventListener(
+      "keypress",
+      event => {
+        if (event.keyCode == lazy.KeyCodes.DOM_VK_RETURN) {
+          this.setActiveSummary(summary);
+        }
+      },
+      eventListenersConfig
+    );
+
+    summary.querySelector(".stylesheet-saveButton").addEventListener(
+      "click",
+      event => {
+        event.stopPropagation();
+        event.target.blur();
+
+        createdEditor.saveToFile(createdEditor.savedFile);
+      },
+      eventListenersConfig
+    );
+
+    this.#updateSummaryForEditor(createdEditor, summary);
+
+    summary.addEventListener(
+      "contextmenu",
+      () => {
+        this.#contextMenuStyleSheet = createdEditor.styleSheet;
+      },
+      eventListenersConfig
+    );
+
+    summary.addEventListener(
+      "focus",
+      function onSummaryFocus(event) {
+        if (event.target == summary) {
+          // autofocus the stylesheet name
+          summary.querySelector(".stylesheet-name").focus();
+        }
+      },
+      eventListenersConfig
+    );
+
+    const sidebar = details.querySelector(".stylesheet-sidebar");
+    sidebar.style.width = Services.prefs.getIntPref(PREF_SIDEBAR_WIDTH) + "px";
+
+    const splitter = details.querySelector(".devtools-side-splitter");
+    splitter.addEventListener(
+      "mousemove",
+      () => {
+        const sidebarWidth = parseInt(sidebar.style.width, 10);
+        if (!isNaN(sidebarWidth)) {
+          Services.prefs.setIntPref(PREF_SIDEBAR_WIDTH, sidebarWidth);
+
+          // update all at-rules sidebars for consistency
+          const sidebars = [
+            ...this.#panelDoc.querySelectorAll(".stylesheet-sidebar"),
+          ];
+          for (const atRuleSidebar of sidebars) {
+            atRuleSidebar.style.width = sidebarWidth + "px";
+          }
+        }
+      },
+      eventListenersConfig
+    );
+
+    // autofocus if it's a new user-created stylesheet
+    if (createdEditor.isNew) {
+      this.#selectEditor(createdEditor);
+    }
+
+    if (this.#isEditorToSelect(createdEditor)) {
+      this.switchToSelectedSheet();
+    }
+
+    // If this is the first stylesheet and there is no pending request to
+    // select a particular style sheet, select this sheet.
+    if (
+      !this.selectedEditor &&
+      !this.#styleSheetBoundToSelect &&
+      createdEditor.styleSheet.styleSheetIndex == 0 &&
+      !summary.classList.contains(FILTERED_CLASSNAME)
+    ) {
+      this.#selectEditor(createdEditor);
+    }
+    this.emit("editor-added", createdEditor);
+  }
+
+  /**
+   * Switch to the editor that has been marked to be selected.
+   *
+   * @return {Promise}
+   *         Promise that will resolve when the editor is selected.
+   */
+  switchToSelectedSheet() {
+    const toSelect = this.#styleSheetToSelect;
+
+    for (const editor of this.editors) {
+      if (this.#isEditorToSelect(editor)) {
+        // The _styleSheetBoundToSelect will always hold the latest pending
+        // requested style sheet (with line and column) which is not yet
+        // selected by the source editor. Only after we select that particular
+        // editor and go the required line and column, it will become null.
+        this.#styleSheetBoundToSelect = this.#styleSheetToSelect;
+        this.#styleSheetToSelect = null;
+        return this.#selectEditor(editor, toSelect.line, toSelect.col);
+      }
+    }
+
+    return Promise.resolve();
+  }
+
+  /**
+   * Returns whether a given editor is the current editor to be selected. Tests
+   * based on href or underlying stylesheet.
+   *
+   * @param {StyleSheetEditor} editor
+   *        The editor to test.
+   */
+  #isEditorToSelect(editor) {
+    const toSelect = this.#styleSheetToSelect;
+    if (!toSelect) {
+      return false;
+    }
+    const isHref =
+      toSelect.stylesheet === null || typeof toSelect.stylesheet == "string";
+
+    return (
+      (isHref && editor.styleSheet.href == toSelect.stylesheet) ||
+      toSelect.stylesheet == editor.styleSheet
+    );
+  }
+
+  /**
+   * Select an editor in the UI.
+   *
+   * @param  {StyleSheetEditor} editor
+   *         Editor to switch to.
+   * @param  {number} line
+   *         Line number to jump to
+   * @param  {number} col
+   *         Column number to jump to
+   * @return {Promise}
+   *         Promise that will resolve when the editor is selected and ready
+   *         to be used.
+   */
+  #selectEditor(editor, line = null, col = null) {
+    // Don't go further if the editor was destroyed in the meantime
+    if (!this.editors.includes(editor)) {
+      return null;
+    }
+
+    const editorPromise = editor.getSourceEditor().then(() => {
+      // line/col are null when the style editor is initialized and the first stylesheet
+      // editor is selected. Unfortunately, this function might be called also when the
+      // panel is opened from clicking on a CSS warning in the WebConsole panel, in which
+      // case we have specific line+col.
+      // There's no guarantee which one could be called first, and it happened that we
+      // were setting the cursor once for the correct line coming from the webconsole,
+      // and then re-setting it to the default value (which was <0,0>).
+      // To avoid the race, we simply don't explicitly set the cursor to any default value,
+      // which is not a big deal as CodeMirror does init it to <0,0> anyway.
+      // See Bug 1738124 for more information.
+      if (line !== null || col !== null) {
+        editor.setCursor(line, col);
+      }
+      this.#styleSheetBoundToSelect = null;
+    });
+
+    const summaryPromise = this.getEditorSummary(editor).then(summary => {
+      // Don't go further if the editor was destroyed in the meantime
+      if (!this.editors.includes(editor)) {
+        throw new Error("Editor was destroyed");
+      }
+      this.setActiveSummary(summary);
+    });
+
+    return Promise.all([editorPromise, summaryPromise]);
+  }
+
+  getEditorSummary(editor) {
+    const self = this;
+
+    if (editor.summary) {
+      return Promise.resolve(editor.summary);
+    }
+
+    return new Promise(resolve => {
+      this.on("editor-added", function onAdd(selected) {
+        if (selected == editor) {
+          self.off("editor-added", onAdd);
+          resolve(editor.summary);
+        }
+      });
+    });
+  }
+
+  getEditorDetails(editor) {
+    const self = this;
+
+    if (editor.details) {
+      return Promise.resolve(editor.details);
+    }
+
+    return new Promise(resolve => {
+      this.on("editor-added", function onAdd(selected) {
+        if (selected == editor) {
+          self.off("editor-added", onAdd);
+          resolve(editor.details);
+        }
+      });
+    });
+  }
+
+  /**
+   * Returns an identifier for the given style sheet.
+   *
+   * @param {StyleSheet} styleSheet
+   *        The style sheet to be identified.
+   */
+  getStyleSheetIdentifier(styleSheet) {
+    // Identify inline style sheets by their host page URI and index
+    // at the page.
+    return styleSheet.href
+      ? styleSheet.href
+      : "inline-" + styleSheet.styleSheetIndex + "-at-" + styleSheet.nodeHref;
+  }
+
+  /**
+   * Get the OriginalSource object for a given original sourceId returned from
+   * the sourcemap worker service.
+   *
+   * @param {string} sourceId
+   *        The ID to search for from the sourcemap worker.
+   *
+   * @return {OriginalSource | null}
+   */
+  getOriginalSourceSheet(sourceId) {
+    for (const editor of this.editors) {
+      const { styleSheet } = editor;
+      if (styleSheet.isOriginalSource && styleSheet.sourceId === sourceId) {
+        return styleSheet;
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Given an URL, find a stylesheet resource with that URL, if one has been
+   * loaded into the editor.js
+   *
+   * Do not use this unless you have no other way to get a StyleSheet resource
+   * multiple sheets could share the same URL, so this will give you _one_
+   * of possibly many sheets with that URL.
+   *
+   * @param {string} url
+   *        An arbitrary URL to search for.
+   *
+   * @return {StyleSheetResource|null}
+   */
+  getStylesheetResourceForGeneratedURL(url) {
+    for (const styleSheet of this.#seenSheets.keys()) {
+      const sheetURL = styleSheet.href || styleSheet.nodeHref;
+      if (!styleSheet.isOriginalSource && sheetURL === url) {
+        return styleSheet;
+      }
+    }
+    return null;
+  }
+
+  /**
+   * selects a stylesheet and optionally moves the cursor to a selected line
+   *
+   * @param {StyleSheetResource} stylesheet
+   *        Stylesheet to select or href of stylesheet to select
+   * @param {Number} line
+   *        Line to which the caret should be moved (zero-indexed).
+   * @param {Number} col
+   *        Column to which the caret should be moved (zero-indexed).
+   * @return {Promise}
+   *         Promise that will resolve when the editor is selected and ready
+   *         to be used.
+   */
+  selectStyleSheet(stylesheet, line, col) {
+    this.#styleSheetToSelect = {
+      stylesheet,
+      line,
+      col,
+    };
+
+    /* Switch to the editor for this sheet, if it exists yet.
+       Otherwise each editor will be checked when it's created. */
+    return this.switchToSelectedSheet();
+  }
+
+  /**
+   * Handler for an editor's 'property-changed' event.
+   * Update the summary in the UI.
+   *
+   * @param  {StyleSheetEditor} editor
+   *         Editor for which a property has changed
+   */
+  #summaryChange(editor) {
+    this.#updateSummaryForEditor(editor);
+  }
+
+  /**
+   * Update split view summary of given StyleEditor instance.
+   *
+   * @param {StyleSheetEditor} editor
+   * @param {DOMElement} summary
+   *        Optional item's summary element to update. If none, item
+   *        corresponding to passed editor is used.
+   */
+  #updateSummaryForEditor(editor, summary) {
+    summary = summary || editor.summary;
+    if (!summary) {
+      return;
+    }
+
+    let ruleCount = editor.styleSheet.ruleCount;
+    if (editor.styleSheet.relatedStyleSheet) {
+      ruleCount = editor.styleSheet.relatedStyleSheet.ruleCount;
+    }
+    if (ruleCount === undefined) {
+      ruleCount = "-";
+    }
+
+    summary.classList.toggle("disabled", !!editor.styleSheet.disabled);
+    summary.classList.toggle("unsaved", !!editor.unsaved);
+    summary.classList.toggle("linked-file-error", !!editor.linkedCSSFileError);
+
+    const label = summary.querySelector(".stylesheet-name > label");
+    label.setAttribute("value", editor.friendlyName);
+    if (editor.styleSheet.href) {
+      label.setAttribute("tooltiptext", editor.styleSheet.href);
+    }
+
+    let linkedCSSSource = "";
+    if (editor.linkedCSSFile) {
+      linkedCSSSource = PathUtils.filename(editor.linkedCSSFile);
+    } else if (editor.styleSheet.relatedEditorName) {
+      linkedCSSSource = editor.styleSheet.relatedEditorName;
+    }
+    text(summary, ".stylesheet-linked-file", linkedCSSSource);
+    text(summary, ".stylesheet-title", editor.styleSheet.title || "");
+    text(
+      summary,
+      ".stylesheet-rule-count",
+      PluralForm.get(ruleCount, getString("ruleCount.label")).replace(
+        "#1",
+        ruleCount
+      )
+    );
+
+    // We may need to change the summary visibility as a result of the changes.
+    this.handleSummaryVisibility(summary);
+  }
+
+  /**
+   * Update the at-rules sidebar for an editor. Hide if there are no rules
+   * Display a list of the at-rules (@media, @layer, @container, …) in the editor's associated style sheet.
+   * Emits a 'at-rules-list-changed' event after updating the UI.
+   *
+   * @param  {StyleSheetEditor} editor
+   *         Editor to update sidebar of
+   */
+  #updateAtRulesList = editor => {
+    (async function () {
+      const details = await this.getEditorDetails(editor);
+      const list = details.querySelector(".stylesheet-at-rules-list");
+
+      while (list.firstChild) {
+        list.firstChild.remove();
+      }
+
+      const rules = editor.atRules;
+      const showSidebar = Services.prefs.getBoolPref(PREF_AT_RULES_SIDEBAR);
+      const sidebar = details.querySelector(".stylesheet-sidebar");
+
+      let inSource = false;
+
+      for (const rule of rules) {
+        const { line, column } = rule;
+
+        let location = {
+          line,
+          column,
+          source: editor.styleSheet.href,
+          styleSheet: editor.styleSheet,
+        };
+        if (editor.styleSheet.isOriginalSource) {
+          const styleSheet = editor.cssSheet;
+          location = await editor.styleSheet.getOriginalLocation(
+            styleSheet,
+            line,
+            column
+          );
+        }
+
+        // this at-rule is from a different original source
+        if (location.source != editor.styleSheet.href) {
+          continue;
+        }
+        inSource = true;
+
+        const div = this.#panelDoc.createElementNS(HTML_NS, "div");
+        div.classList.add("at-rule-label", rule.type);
+        div.addEventListener(
+          "click",
+          this.#jumpToLocation.bind(this, location)
+        );
+
+        const ruleTextContainer = this.#panelDoc.createElementNS(
+          HTML_NS,
+          "div"
+        );
+        const type = this.#panelDoc.createElementNS(HTML_NS, "span");
+        type.className = "at-rule-type";
+        type.append(this.#panelDoc.createTextNode(`@${rule.type}\u00A0`));
+        if (rule.type == "layer" && rule.layerName) {
+          type.append(this.#panelDoc.createTextNode(`${rule.layerName}\u00A0`));
+        }
+
+        const cond = this.#panelDoc.createElementNS(HTML_NS, "span");
+        cond.className = "at-rule-condition";
+        if (rule.type == "media" && !rule.matches) {
+          cond.classList.add("media-condition-unmatched");
+        }
+        if (this.#commands.descriptorFront.isLocalTab) {
+          this.#setConditionContents(cond, rule.conditionText, rule.type);
+        } else {
+          cond.textContent = rule.conditionText;
+        }
+
+        const link = this.#panelDoc.createElementNS(HTML_NS, "div");
+        link.className = "at-rule-line theme-link";
+        if (location.line != -1) {
+          link.textContent = ":" + location.line;
+        }
+
+        ruleTextContainer.append(type, cond);
+        div.append(ruleTextContainer, link);
+        list.appendChild(div);
+      }
+
+      sidebar.hidden = !showSidebar || !inSource;
+
+      this.emit("at-rules-list-changed", editor);
+    })
+      .bind(this)()
+      .catch(console.error);
+  };
+
+  /**
+   * Set the condition text for the at-rule element.
+   * For media queries, it also injects links to open RDM at a specific size.
+   *
+   * @param {HTMLElement} element
+   *        The element corresponding to the media sidebar condition
+   * @param {String} ruleConditionText
+   *        The rule conditionText
+   * @param {String} type
+   *        The type of the at-rule (e.g. "media", "layer", "supports", …)
+   */
+  #setConditionContents(element, ruleConditionText, type) {
+    if (!ruleConditionText) {
+      return;
+    }
+
+    // For non-media rules, we don't do anything more than displaying the conditionText
+    // as there are no other condition text that would justify opening RDM at a specific
+    // size (e.g. `@container` condition is relative to a container size, which varies
+    // depending the node the rule applies to).
+    if (type !== "media") {
+      const node = this.#panelDoc.createTextNode(ruleConditionText);
+      element.appendChild(node);
+      return;
+    }
+
+    const minMaxPattern = /(min\-|max\-)(width|height):\s\d+(px)/gi;
+
+    let match = minMaxPattern.exec(ruleConditionText);
+    let lastParsed = 0;
+    while (match && match.index != minMaxPattern.lastIndex) {
+      const matchEnd = match.index + match[0].length;
+      const node = this.#panelDoc.createTextNode(
+        ruleConditionText.substring(lastParsed, match.index)
+      );
+      element.appendChild(node);
+
+      const link = this.#panelDoc.createElementNS(HTML_NS, "a");
+      link.href = "#";
+      link.className = "media-responsive-mode-toggle";
+      link.textContent = ruleConditionText.substring(match.index, matchEnd);
+      link.addEventListener("click", this.#onMediaConditionClick.bind(this));
+      element.appendChild(link);
+
+      match = minMaxPattern.exec(ruleConditionText);
+      lastParsed = matchEnd;
+    }
+
+    const node = this.#panelDoc.createTextNode(
+      ruleConditionText.substring(lastParsed, ruleConditionText.length)
+    );
+    element.appendChild(node);
+  }
+
+  /**
+   * Called when a media condition is clicked
+   * If a responsive mode link is clicked, it will launch it.
+   *
+   * @param {object} e
+   *        Event object
+   */
+  #onMediaConditionClick(e) {
+    const conditionText = e.target.textContent;
+    const isWidthCond = conditionText.toLowerCase().indexOf("width") > -1;
+    const mediaVal = parseInt(/\d+/.exec(conditionText), 10);
+
+    const options = isWidthCond ? { width: mediaVal } : { height: mediaVal };
+    this.#launchResponsiveMode(options);
+    e.preventDefault();
+    e.stopPropagation();
+  }
+
+  /**
+   * Launches the responsive mode with a specific width or height.
+   *
+   * @param  {object} options
+   *         Object with width or/and height properties.
+   */
+  async #launchResponsiveMode(options = {}) {
+    const tab = this.#commands.descriptorFront.localTab;
+    const win = tab.ownerDocument.defaultView;
+
+    await lazy.ResponsiveUIManager.openIfNeeded(win, tab, {
+      trigger: "style_editor",
+    });
+    this.emit("responsive-mode-opened");
+
+    lazy.ResponsiveUIManager.getResponsiveUIForTab(tab).setViewportSize(
+      options
+    );
+  }
+
+  /**
+   * Jump cursor to the editor for a stylesheet and line number for a rule.
+   *
+   * @param  {object} location
+   *         Location object with 'line', 'column', and 'source' properties.
+   */
+  #jumpToLocation(location) {
+    const source = location.styleSheet || location.source;
+    this.selectStyleSheet(source, location.line - 1, location.column - 1);
+  }
+
+  #startLoadingStyleSheets() {
+    this.#root.classList.add("loading");
+    this.#loadingStyleSheets = [];
+  }
+
+  async #waitForLoadingStyleSheets() {
+    while (this.#loadingStyleSheets?.length > 0) {
+      const pending = this.#loadingStyleSheets;
+      this.#loadingStyleSheets = [];
+      await Promise.all(pending);
+    }
+
+    this.#loadingStyleSheets = null;
+    this.#root.classList.remove("loading");
+  }
+
+  async #handleStyleSheetResource(resource) {
+    try {
+      // The fileName is in resource means this stylesheet was imported from file by user.
+      const { fileName } = resource;
+      let file = fileName ? new lazy.FileUtils.File(fileName) : null;
+
+      // recall location of saved file for this sheet after page reload
+      if (!file) {
+        const identifier = this.getStyleSheetIdentifier(resource);
+        const savedFile = this.savedLocations[identifier];
+        if (savedFile) {
+          file = savedFile;
+        }
+      }
+      resource.file = file;
+
+      await this.#addStyleSheet(resource);
+    } catch (e) {
+      console.error(e);
+      this.emit("error", { key: LOAD_ERROR, level: "warning" });
+    }
+  }
+
+  // onAvailable is a mandatory argument for watchTargets,
+  // but we don't do anything when a new target gets created.
+  #onTargetAvailable = ({ targetFront }) => {};
+
+  #onTargetDestroyed = ({ targetFront }) => {
+    // Iterate over a copy of the list in order to prevent skipping
+    // over some items when removing items of this list
+    const editorsCopy = [...this.editors];
+    for (const editor of editorsCopy) {
+      const { styleSheet } = editor;
+      if (styleSheet.targetFront == targetFront) {
+        this.#removeStyleSheet(styleSheet, editor);
+      }
+    }
+  };
+
+  #onResourceAvailable = async resources => {
+    const promises = [];
+    for (const resource of resources) {
+      if (
+        resource.resourceType === this.#toolbox.resourceCommand.TYPES.STYLESHEET
+      ) {
+        const onStyleSheetHandled = this.#handleStyleSheetResource(resource);
+
+        if (this.#loadingStyleSheets) {
+          // In case of reloading/navigating and panel's opening
+          this.#loadingStyleSheets.push(onStyleSheetHandled);
+        }
+        promises.push(onStyleSheetHandled);
+        continue;
+      }
+
+      if (!resource.targetFront.isTopLevel) {
+        continue;
+      }
+
+      if (resource.name === "will-navigate") {
+        this.#startLoadingStyleSheets();
+        this.#clear();
+      } else if (resource.name === "dom-complete") {
+        promises.push(this.#waitForLoadingStyleSheets());
+      }
+    }
+    await Promise.all(promises);
+  };
+
+  #onResourceUpdated = async updates => {
+    for (const { resource, update } of updates) {
+      if (
+        update.resourceType === this.#toolbox.resourceCommand.TYPES.STYLESHEET
+      ) {
+        const editor = this.editors.find(
+          e => e.resourceId === update.resourceId
+        );
+
+        switch (update.updateType) {
+          case "style-applied": {
+            editor.onStyleApplied(update);
+            break;
+          }
+          case "property-change": {
+            for (const [property, value] of Object.entries(
+              update.resourceUpdates
+            )) {
+              editor.onPropertyChange(property, value);
+            }
+            break;
+          }
+          case "at-rules-changed":
+          case "matches-change": {
+            editor.onAtRulesChanged(resource.atRules);
+            break;
+          }
+        }
+      }
+    }
+  };
+
+  /**
+   * Set the active item's summary element.
+   *
+   * @param DOMElement summary
+   * @param {Object} options
+   * @param {String=} options.reason: Indicates why the summary was selected. It's set to
+   *                  "filter-auto" when the summary was automatically selected as the result
+   *                  of the previous active summary being filtered out.
+   */
+  setActiveSummary(summary, options = {}) {
+    if (summary == this.#activeSummary) {
+      return;
+    }
+
+    if (this.#activeSummary) {
+      const binding = this.#summaryDataMap.get(this.#activeSummary);
+
+      this.#activeSummary.classList.remove("splitview-active");
+      binding.details.classList.remove("splitview-active");
+    }
+
+    this.#activeSummary = summary;
+    if (!summary) {
+      this.selectedEditor = null;
+      return;
+    }
+
+    const { details } = this.#summaryDataMap.get(summary);
+    summary.classList.add("splitview-active");
+    details.classList.add("splitview-active");
+
+    this.showSummaryEditor(summary, options);
+  }
+
+  /**
+   * Show summary's associated editor
+   *
+   * @param DOMElement summary
+   * @param {Object} options
+   * @param {String=} options.reason: Indicates why the summary was selected. It's set to
+   *                  "filter-auto" when the summary was automatically selected as the result
+   *                  of the previous active summary being filtered out.
+   */
+  async showSummaryEditor(summary, options) {
+    const { details, editor } = this.#summaryDataMap.get(summary);
+    this.selectedEditor = editor;
+
+    try {
+      if (!editor.sourceEditor) {
+        // only initialize source editor when we switch to this view
+        const inputElement = details.querySelector(".stylesheet-editor-input");
+        await editor.load(inputElement, this.#cssProperties);
+      }
+
+      editor.onShow(options);
+
+      this.emit("editor-selected", editor);
+    } catch (e) {
+      console.error(e);
+    }
+  }
+
+  /**
+   * Remove an item from the split view.
+   *
+   * @param DOMElement summary
+   *        Summary element of the item to remove.
+   */
+  removeSplitViewItem(summary) {
+    if (summary == this.#activeSummary) {
+      this.setActiveSummary(null);
+    }
+
+    const data = this.#summaryDataMap.get(summary);
+    if (!data) {
+      return;
+    }
+
+    summary.remove();
+    data.details.remove();
+  }
+
+  /**
+   * Make the passed element visible or not, depending if it matches the current filter
+   *
+   * @param {Element} summary
+   * @param {Object} options
+   * @param {Boolean} options.triggerOnFilterStateChange: Set to false to avoid calling
+   *                  #onFilterStateChange directly here. This can be useful when this
+   *                  function is called for every item of the list, like in `setFilter`.
+   */
+  handleSummaryVisibility(summary, { triggerOnFilterStateChange = true } = {}) {
+    if (!this.#filter) {
+      summary.classList.remove(FILTERED_CLASSNAME);
+      return;
+    }
+
+    const label = summary.querySelector(".stylesheet-name label");
+    const itemText = label.value.toLowerCase();
+    const matchesSearch = itemText.includes(this.#filter.toLowerCase());
+    summary.classList.toggle(FILTERED_CLASSNAME, !matchesSearch);
+
+    if (this.#activeSummary == summary && !matchesSearch) {
+      this.setActiveSummary(null);
+    }
+
+    if (triggerOnFilterStateChange) {
+      this.#onFilterStateChange();
+    }
+  }
+
+  destroy() {
+    this.#toolbox.resourceCommand.unwatchResources(
+      [
+        this.#toolbox.resourceCommand.TYPES.DOCUMENT_EVENT,
+        this.#toolbox.resourceCommand.TYPES.STYLESHEET,
+      ],
+      {
+        onAvailable: this.#onResourceAvailable,
+        onUpdated: this.#onResourceUpdated,
+      }
+    );
+    this.#commands.targetCommand.unwatchTargets({
+      types: [this.#commands.targetCommand.TYPES.FRAME],
+      onAvailable: this.#onTargetAvailable,
+      onDestroyed: this.#onTargetDestroyed,
+    });
+
+    if (this.#uiAbortController) {
+      this.#uiAbortController.abort();
+      this.#uiAbortController = null;
+    }
+    this.#clearStyleSheetEditors();
+
+    this.#seenSheets = null;
+    this.#filterInput = null;
+    this.#filterInputClearButton = null;
+    this.#nav = null;
+    this.#side = null;
+    this.#tplDetails = null;
+    this.#tplSummary = null;
+
+    const sidebar = this.#panelDoc.querySelector(".splitview-controller");
+    const sidebarWidth = parseInt(sidebar.style.width, 10);
+    if (!isNaN(sidebarWidth)) {
+      Services.prefs.setIntPref(PREF_NAV_WIDTH, sidebarWidth);
+    }
+
+    if (this.#sourceMapPrefObserver) {
+      this.#sourceMapPrefObserver.off(
+        PREF_ORIG_SOURCES,
+        this.#onOrigSourcesPrefChanged
+      );
+      this.#sourceMapPrefObserver.destroy();
+      this.#sourceMapPrefObserver = null;
+    }
+
+    if (this.#prefObserver) {
+      this.#prefObserver.off(
+        PREF_AT_RULES_SIDEBAR,
+        this.#onAtRulesSidebarPrefChanged
+      );
+      this.#prefObserver.destroy();
+      this.#prefObserver = null;
+    }
+
+    if (this.#shortcuts) {
+      this.#shortcuts.destroy();
+      this.#shortcuts = null;
+    }
+  }
+}
diff --git a/devtools/client/styleeditor/StyleEditorUtil.sys.mjs b/devtools/client/styleeditor/StyleEditorUtil.sys.mjs
new file mode 100644
index 0000000000..739dc55fc5
--- /dev/null
+++ b/devtools/client/styleeditor/StyleEditorUtil.sys.mjs
@@ -0,0 +1,213 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* All top-level definitions here are exports.  */
+/* eslint no-unused-vars: [2, {"vars": "local"}] */
+
+const PROPERTIES_URL = "chrome://devtools/locale/styleeditor.properties";
+
+import { loader } from "resource://devtools/shared/loader/Loader.sys.mjs";
+
+const gStringBundle = Services.strings.createBundle(PROPERTIES_URL);
+
+const lazy = {};
+
+loader.lazyRequireGetter(
+  lazy,
+  "Menu",
+  "resource://devtools/client/framework/menu.js"
+);
+loader.lazyRequireGetter(
+  lazy,
+  "MenuItem",
+  "resource://devtools/client/framework/menu-item.js"
+);
+
+const PREF_AT_RULES_SIDEBAR = "devtools.styleeditor.showAtRulesSidebar";
+const PREF_ORIG_SOURCES = "devtools.source-map.client-service.enabled";
+
+/**
+ * Returns a localized string with the given key name from the string bundle.
+ *
+ * @param name
+ * @param ...rest
+ *        Optional arguments to format in the string.
+ * @return string
+ */
+export function getString(name) {
+  try {
+    if (arguments.length == 1) {
+      return gStringBundle.GetStringFromName(name);
+    }
+    const rest = Array.prototype.slice.call(arguments, 1);
+    return gStringBundle.formatStringFromName(name, rest);
+  } catch (ex) {
+    console.error(ex);
+    throw new Error(
+      "L10N error. '" + name + "' is missing from " + PROPERTIES_URL
+    );
+  }
+}
+
+/**
+ * Assert an expression is true or throw if false.
+ *
+ * @param expression
+ * @param message
+ *        Optional message.
+ * @return expression
+ */
+export function assert(expression, message) {
+  if (!expression) {
+    const msg = message ? "ASSERTION FAILURE:" + message : "ASSERTION FAILURE";
+    log(msg);
+    throw new Error(msg);
+  }
+  return expression;
+}
+
+/**
+ * Retrieve or set the text content of an element.
+ *
+ * @param DOMElement root
+ *        The element to use for querySelector.
+ * @param string selector
+ *        Selector string for the element to get/set the text content.
+ * @param string textContent
+ *        Optional text to set.
+ * @return string
+ *         Text content of matching element or null if there were no element
+ *         matching selector.
+ */
+export function text(root, selector, textContent) {
+  const element = root.querySelector(selector);
+  if (!element) {
+    return null;
+  }
+
+  if (textContent === undefined) {
+    return element.textContent;
+  }
+  element.textContent = textContent;
+  return textContent;
+}
+
+/**
+ * Log a message to the console.
+ *
+ * @param ...rest
+ *        One or multiple arguments to log.
+ *        If multiple arguments are given, they will be joined by " "
+ *        in the log.
+ */
+export function log() {
+  console.logStringMessage(Array.prototype.slice.call(arguments).join(" "));
+}
+
+/**
+ * Show file picker and return the file user selected.
+ *
+ * @param mixed file
+ *        Optional nsIFile or string representing the filename to auto-select.
+ * @param boolean toSave
+ *        If true, the user is selecting a filename to save.
+ * @param nsIWindow parentWindow
+ *        Optional parent window. If null the parent window of the file picker
+ *        will be the window of the attached input element.
+ * @param callback
+ *        The callback method, which will be called passing in the selected
+ *        file or null if the user did not pick one.
+ * @param AString suggestedFilename
+ *        The suggested filename when toSave is true.
+ */
+export function showFilePicker(
+  path,
+  toSave,
+  parentWindow,
+  callback,
+  suggestedFilename
+) {
+  if (typeof path == "string") {
+    try {
+      if (Services.io.extractScheme(path) == "file") {
+        const uri = Services.io.newURI(path);
+        const file = uri.QueryInterface(Ci.nsIFileURL).file;
+        callback(file);
+        return;
+      }
+    } catch (ex) {
+      callback(null);
+      return;
+    }
+    try {
+      const file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
+      file.initWithPath(path);
+      callback(file);
+      return;
+    } catch (ex) {
+      callback(null);
+      return;
+    }
+  }
+  if (path) {
+    // "path" is an nsIFile
+    callback(path);
+    return;
+  }
+
+  const fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+  const mode = toSave ? fp.modeSave : fp.modeOpen;
+  const key = toSave ? "saveStyleSheet" : "importStyleSheet";
+  const fpCallback = function (result) {
+    if (result == Ci.nsIFilePicker.returnCancel) {
+      callback(null);
+    } else {
+      callback(fp.file);
+    }
+  };
+
+  if (toSave && suggestedFilename) {
+    fp.defaultString = suggestedFilename;
+  }
+
+  fp.init(parentWindow, getString(key + ".title"), mode);
+  fp.appendFilter(getString(key + ".filter"), "*.css");
+  fp.appendFilters(fp.filterAll);
+  fp.open(fpCallback);
+}
+
+/**
+ * Returns a Popup Menu for the Options ("gear") Button
+ * @param {function} toggleOrigSources
+ *        To toggle the original source pref
+ * @param {function} toggleAtRulesSidebar
+ *        To toggle the pref to show at-rules side bar
+ * @return {object} popupMenu
+ *         A Menu object holding the MenuItems
+ */
+export function optionsPopupMenu(toggleOrigSources, toggleAtRulesSidebar) {
+  const popupMenu = new lazy.Menu();
+  popupMenu.append(
+    new lazy.MenuItem({
+      id: "options-origsources",
+      label: getString("showOriginalSources.label"),
+      accesskey: getString("showOriginalSources.accesskey"),
+      type: "checkbox",
+      checked: Services.prefs.getBoolPref(PREF_ORIG_SOURCES),
+      click: () => toggleOrigSources(),
+    })
+  );
+  popupMenu.append(
+    new lazy.MenuItem({
+      id: "options-show-at-rules",
+      label: getString("showAtRulesSidebar.label"),
+      accesskey: getString("showAtRulesSidebar.accesskey"),
+      type: "checkbox",
+      checked: Services.prefs.getBoolPref(PREF_AT_RULES_SIDEBAR),
+      click: () => toggleAtRulesSidebar(),
+    })
+  );
+
+  return popupMenu;
+}
diff --git a/devtools/client/styleeditor/StyleSheetEditor.sys.mjs b/devtools/client/styleeditor/StyleSheetEditor.sys.mjs
new file mode 100644
index 0000000000..c863b5b267
--- /dev/null
+++ b/devtools/client/styleeditor/StyleSheetEditor.sys.mjs
@@ -0,0 +1,1040 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import {
+  require,
+  loader,
+} from "resource://devtools/shared/loader/Loader.sys.mjs";
+
+const Editor = require("resource://devtools/client/shared/sourceeditor/editor.js");
+const {
+  shortSource,
+  prettifyCSS,
+} = require("resource://devtools/shared/inspector/css-logic.js");
+const { throttle } = require("resource://devtools/shared/throttle.js");
+const EventEmitter = require("resource://devtools/shared/event-emitter.js");
+
+const lazy = {};
+
+loader.lazyGetter(lazy, "BufferStream", () => {
+  return Components.Constructor(
+    "@mozilla.org/io/arraybuffer-input-stream;1",
+    "nsIArrayBufferInputStream",
+    "setData"
+  );
+});
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  FileUtils: "resource://gre/modules/FileUtils.sys.mjs",
+});
+ChromeUtils.defineModuleGetter(
+  lazy,
+  "NetUtil",
+  "resource://gre/modules/NetUtil.jsm"
+);
+
+import {
+  getString,
+  showFilePicker,
+} from "resource://devtools/client/styleeditor/StyleEditorUtil.sys.mjs";
+
+const LOAD_ERROR = "error-load";
+const SAVE_ERROR = "error-save";
+const SELECTOR_HIGHLIGHTER_TYPE = "SelectorHighlighter";
+
+// max update frequency in ms (avoid potential typing lag and/or flicker)
+// @see StyleEditor.updateStylesheet
+const UPDATE_STYLESHEET_DELAY = 500;
+
+// Pref which decides if CSS autocompletion is enabled in Style Editor or not.
+const AUTOCOMPLETION_PREF = "devtools.styleeditor.autocompletion-enabled";
+
+// Pref which decides whether updates to the stylesheet use transitions
+const TRANSITION_PREF = "devtools.styleeditor.transitions";
+
+// How long to wait to update linked CSS file after original source was saved
+// to disk. Time in ms.
+const CHECK_LINKED_SHEET_DELAY = 500;
+
+// How many times to check for linked file changes
+const MAX_CHECK_COUNT = 10;
+
+// How much time should the mouse be still before the selector at that position
+// gets highlighted?
+const SELECTOR_HIGHLIGHT_TIMEOUT = 500;
+
+// Minimum delay between firing two at-rules-changed events.
+const EMIT_AT_RULES_THROTTLING = 500;
+
+const STYLE_SHEET_UPDATE_CAUSED_BY_STYLE_EDITOR = "styleeditor";
+
+/**
+ * StyleSheetEditor controls the editor linked to a particular StyleSheet
+ * object.
+ *
+ * Emits events:
+ *   'property-change': A property on the underlying stylesheet has changed
+ *   'source-editor-load': The source editor for this editor has been loaded
+ *   'error': An error has occured
+ *
+ * @param  {Resource} resource
+ *         The STYLESHEET resource which is received from resource command.
+ * @param {DOMWindow}  win
+ *        panel window for style editor
+ * @param {Number} styleSheetFriendlyIndex
+ *        Optional Integer representing the index of the current stylesheet
+ *        among all stylesheets of its type (inline or user-created)
+ */
+export function StyleSheetEditor(resource, win, styleSheetFriendlyIndex) {
+  EventEmitter.decorate(this);
+
+  this._resource = resource;
+  this._inputElement = null;
+  this.sourceEditor = null;
+  this._window = win;
+  this._isNew = this.styleSheet.isNew;
+  this.styleSheetFriendlyIndex = styleSheetFriendlyIndex;
+
+  // True when we've just set the editor text based on a style-applied
+  // event from the StyleSheetActor.
+  this._justSetText = false;
+
+  // state to use when inputElement attaches
+  this._state = {
+    text: "",
+    selection: {
+      start: { line: 0, ch: 0 },
+      end: { line: 0, ch: 0 },
+    },
+  };
+
+  this._styleSheetFilePath = null;
+  if (
+    this.styleSheet.href &&
+    Services.io.extractScheme(this.styleSheet.href) == "file"
+  ) {
+    this._styleSheetFilePath = this.styleSheet.href;
+  }
+
+  this.onPropertyChange = this.onPropertyChange.bind(this);
+  this.onAtRulesChanged = this.onAtRulesChanged.bind(this);
+  this.checkLinkedFileForChanges = this.checkLinkedFileForChanges.bind(this);
+  this.markLinkedFileBroken = this.markLinkedFileBroken.bind(this);
+  this.saveToFile = this.saveToFile.bind(this);
+  this.updateStyleSheet = this.updateStyleSheet.bind(this);
+  this._updateStyleSheet = this._updateStyleSheet.bind(this);
+  this._onMouseMove = this._onMouseMove.bind(this);
+
+  this._focusOnSourceEditorReady = false;
+  this.savedFile = this.styleSheet.file;
+  this.linkCSSFile();
+
+  this.emitAtRulesChanged = throttle(
+    this.emitAtRulesChanged,
+    EMIT_AT_RULES_THROTTLING,
+    this
+  );
+
+  this.atRules = [];
+}
+
+StyleSheetEditor.prototype = {
+  get resourceId() {
+    return this._resource.resourceId;
+  },
+
+  get styleSheet() {
+    return this._resource;
+  },
+
+  /**
+   * Whether there are unsaved changes in the editor
+   */
+  get unsaved() {
+    return this.sourceEditor && !this.sourceEditor.isClean();
+  },
+
+  /**
+   * Whether the editor is for a stylesheet created by the user
+   * through the style editor UI.
+   */
+  get isNew() {
+    return this._isNew;
+  },
+
+  /**
+   * The style sheet or the generated style sheet for this source if it's an
+   * original source.
+   */
+  get cssSheet() {
+    if (this.styleSheet.isOriginalSource) {
+      return this.styleSheet.relatedStyleSheet;
+    }
+    return this.styleSheet;
+  },
+
+  get savedFile() {
+    return this._savedFile;
+  },
+
+  set savedFile(name) {
+    this._savedFile = name;
+
+    this.linkCSSFile();
+  },
+
+  /**
+   * Get a user-friendly name for the style sheet.
+   *
+   * @return string
+   */
+  get friendlyName() {
+    if (this.savedFile) {
+      return this.savedFile.leafName;
+    }
+
+    if (this._isNew) {
+      const index = this.styleSheetFriendlyIndex + 1 || 0;
+      return getString("newStyleSheet", index);
+    }
+
+    if (!this.styleSheet.href) {
+      // TODO(bug 1809107): Probably a different index + string for
+      // constructable stylesheets, they can't be meaningfully edited right now
+      // because we don't have their original text.
+      const index = this.styleSheetFriendlyIndex + 1 || 0;
+      return getString("inlineStyleSheet", index);
+    }
+
+    if (!this._friendlyName) {
+      this._friendlyName = shortSource(this.styleSheet);
+      try {
+        this._friendlyName = decodeURI(this._friendlyName);
+      } catch (ex) {
+        // Ignore.
+      }
+    }
+    return this._friendlyName;
+  },
+
+  /**
+   * Check if transitions are enabled for style changes.
+   *
+   * @return Boolean
+   */
+  get transitionsEnabled() {
+    return Services.prefs.getBoolPref(TRANSITION_PREF);
+  },
+
+  /**
+   * If this is an original source, get the path of the CSS file it generated.
+   */
+  linkCSSFile() {
+    if (!this.styleSheet.isOriginalSource) {
+      return;
+    }
+
+    const relatedSheet = this.styleSheet.relatedStyleSheet;
+    if (!relatedSheet || !relatedSheet.href) {
+      return;
+    }
+
+    let path;
+    const href = removeQuery(relatedSheet.href);
+    const uri = lazy.NetUtil.newURI(href);
+
+    if (uri.scheme == "file") {
+      const file = uri.QueryInterface(Ci.nsIFileURL).file;
+      path = file.path;
+    } else if (this.savedFile) {
+      const origHref = removeQuery(this.styleSheet.href);
+      const origUri = lazy.NetUtil.newURI(origHref);
+      path = findLinkedFilePath(uri, origUri, this.savedFile);
+    } else {
+      // we can't determine path to generated file on disk
+      return;
+    }
+
+    if (this.linkedCSSFile == path) {
+      return;
+    }
+
+    this.linkedCSSFile = path;
+
+    this.linkedCSSFileError = null;
+
+    // save last file change time so we can compare when we check for changes.
+    IOUtils.stat(path).then(info => {
+      this._fileModDate = info.lastModified;
+    }, this.markLinkedFileBroken);
+
+    this.emit("linked-css-file");
+  },
+
+  /**
+   * A helper function that fetches the source text from the style
+   * sheet.
+   *
+   * This will set |this._state.text| to the new text.
+   */
+  async _fetchSourceText(options = {}) {
+    const styleSheetsFront = await this._getStyleSheetsFront();
+
+    let longStr = null;
+    if (this.styleSheet.isOriginalSource) {
+      // If the stylesheet is OriginalSource, we should get the texts from SourceMapLoader.
+      // So, for now, we use OriginalSource.getText() as it is.
+      longStr = await this.styleSheet.getText();
+    } else {
+      longStr = await styleSheetsFront.getText(this.resourceId);
+    }
+
+    this._state.text = await longStr.string();
+  },
+
+  /**
+   * Attempt to prettify the current text if the corresponding stylesheet is not
+   * an original source. The text will be read from |this._state.text|.
+   *
+   * This will set |this._state.text| to the prettified text if needed.
+   */
+  _prettifySourceTextIfNeeded() {
+    if (!this.styleSheet.isOriginalSource) {
+      const ruleCount = this.styleSheet.ruleCount;
+      const { result, mappings } = prettifyCSS(this._state.text, ruleCount);
+      // Store the list of objects with mappings between CSS token positions from the
+      // original source to the prettified source. These will be used when requested to
+      // jump to a specific position within the editor.
+      this._mappings = mappings;
+      this._state.text = result;
+    }
+  },
+
+  /**
+   * Start fetching the full text source for this editor's sheet.
+   */
+  async fetchSource() {
+    try {
+      await this._fetchSourceText();
+      this.sourceLoaded = true;
+    } catch (e) {
+      if (this._isDestroyed) {
+        console.warn(
+          `Could not fetch the source for ${this.styleSheet.href}, the editor was destroyed`
+        );
+        console.error(e);
+      } else {
+        console.error(e);
+        this.emit("error", {
+          key: LOAD_ERROR,
+          append: this.styleSheet.href,
+          level: "warning",
+        });
+        throw e;
+      }
+    }
+  },
+
+  /**
+   * Set the cursor at the given line and column location within the code editor.
+   *
+   * @param {Number} line
+   * @param {Number} column
+   */
+  setCursor(line, column) {
+    line = line || 0;
+    column = column || 0;
+
+    const position = this.translateCursorPosition(line, column);
+    this.sourceEditor.setCursor({ line: position.line, ch: position.column });
+  },
+
+  /**
+   * If the stylesheet was automatically prettified, there should be a list of line
+   * and column mappings from the original to the generated source that can be used
+   * to translate the cursor position to the correct location in the prettified source.
+   * If no mappings exist, return the original cursor position unchanged.
+   *
+   * @param  {Number} line
+   * @param  {Numer} column
+   *
+   * @return {Object}
+   */
+  translateCursorPosition(line, column) {
+    if (Array.isArray(this._mappings)) {
+      for (const mapping of this._mappings) {
+        if (
+          mapping.original.line === line &&
+          mapping.original.column === column
+        ) {
+          line = mapping.generated.line;
+          column = mapping.generated.column;
+          continue;
+        }
+      }
+    }
+
+    return { line, column };
+  },
+
+  /**
+   * Forward property-change event from stylesheet.
+   *
+   * @param  {string} event
+   *         Event type
+   * @param  {string} property
+   *         Property that has changed on sheet
+   */
+  onPropertyChange(property, value) {
+    this.emit("property-change", property, value);
+  },
+
+  /**
+   * Called when the stylesheet text changes.
+   * @param {Object} update: The stylesheet resource update packet.
+   */
+  async onStyleApplied(update) {
+    const updateIsFromSyleSheetEditor =
+      update?.event?.cause === STYLE_SHEET_UPDATE_CAUSED_BY_STYLE_EDITOR;
+
+    if (updateIsFromSyleSheetEditor) {
+      // We just applied an edit in the editor, so we can drop this notification.
+      this.emit("style-applied");
+      return;
+    }
+
+    if (this.sourceEditor) {
+      await this._fetchSourceText();
+
+      // sourceEditor is already loaded, so we can prettify immediately.
+      this._prettifySourceTextIfNeeded();
+
+      // The updated stylesheet text should have been set in this._state.text
+      // by _fetchSourceText and _prettifySourceTextIfNeeded.
+      const sourceText = this._state.text;
+
+      this._justSetText = true;
+      const firstLine = this.sourceEditor.getFirstVisibleLine();
+      const pos = this.sourceEditor.getCursor();
+      this.sourceEditor.setText(sourceText);
+      this.sourceEditor.setFirstVisibleLine(firstLine);
+      this.sourceEditor.setCursor(pos);
+      this.emit("style-applied");
+    }
+  },
+
+  /**
+   * Handles changes to the list of at-rules (@media, @layer, @container, …) in the stylesheet.
+   * Emits 'at-rules-changed' if the list has changed.
+   *
+   * @param  {array} rules
+   *         Array of MediaRuleFronts for new media rules of sheet.
+   */
+  onAtRulesChanged(rules) {
+    if (!rules.length && !this.atRules.length) {
+      return;
+    }
+
+    this.atRules = rules;
+    this.emitAtRulesChanged();
+  },
+
+  /**
+   * Forward at-rules-changed event from stylesheet.
+   */
+  emitAtRulesChanged() {
+    this.emit("at-rules-changed", this.atRules);
+  },
+
+  /**
+   * Create source editor and load state into it.
+   * @param  {DOMElement} inputElement
+   *         Element to load source editor in
+   * @param  {CssProperties} cssProperties
+   *         A css properties database.
+   *
+   * @return {Promise}
+   *         Promise that will resolve when the style editor is loaded.
+   */
+  async load(inputElement, cssProperties) {
+    if (this._isDestroyed) {
+      throw new Error(
+        "Won't load source editor as the style sheet has " +
+          "already been removed from Style Editor."
+      );
+    }
+
+    this._inputElement = inputElement;
+
+    // Attempt to prettify the source before loading the source editor.
+    this._prettifySourceTextIfNeeded();
+
+    const walker = await this.getWalker();
+    const config = {
+      value: this._state.text,
+      lineNumbers: true,
+      mode: Editor.modes.css,
+      readOnly: false,
+      autoCloseBrackets: "{}()",
+      extraKeys: this._getKeyBindings(),
+      contextMenu: "sourceEditorContextMenu",
+      autocomplete: Services.prefs.getBoolPref(AUTOCOMPLETION_PREF),
+      autocompleteOpts: { walker, cssProperties },
+      cssProperties,
+    };
+    const sourceEditor = (this._sourceEditor = new Editor(config));
+
+    sourceEditor.on("dirty-change", this.onPropertyChange);
+
+    await sourceEditor.appendTo(inputElement);
+
+    sourceEditor.on("saveRequested", this.saveToFile);
+
+    if (!this.styleSheet.isOriginalSource) {
+      sourceEditor.on("change", this.updateStyleSheet);
+    }
+
+    this.sourceEditor = sourceEditor;
+
+    if (this._focusOnSourceEditorReady) {
+      this._focusOnSourceEditorReady = false;
+      sourceEditor.focus();
+    }
+
+    sourceEditor.setSelection(
+      this._state.selection.start,
+      this._state.selection.end
+    );
+
+    const highlighter = await this.getHighlighter();
+    if (highlighter && walker && sourceEditor.container?.contentWindow) {
+      sourceEditor.container.contentWindow.addEventListener(
+        "mousemove",
+        this._onMouseMove
+      );
+    }
+
+    // Add the commands controller for the source-editor.
+    sourceEditor.insertCommandsController();
+
+    this.emit("source-editor-load");
+  },
+
+  /**
+   * Get the source editor for this editor.
+   *
+   * @return {Promise}
+   *         Promise that will resolve with the editor.
+   */
+  getSourceEditor() {
+    const self = this;
+
+    if (this.sourceEditor) {
+      return Promise.resolve(this);
+    }
+
+    return new Promise(resolve => {
+      this.on("source-editor-load", () => {
+        resolve(self);
+      });
+    });
+  },
+
+  /**
+   * Focus the Style Editor input.
+   */
+  focus() {
+    if (this.sourceEditor) {
+      this.sourceEditor.focus();
+    } else {
+      this._focusOnSourceEditorReady = true;
+    }
+  },
+
+  /**
+   * Event handler for when the editor is shown.
+   *
+   * @param {Object} options
+   * @param {String} options.reason: Indicates why the editor is shown
+   */
+  onShow(options = {}) {
+    if (this.sourceEditor) {
+      // CodeMirror needs refresh to restore scroll position after hiding and
+      // showing the editor.
+      this.sourceEditor.refresh();
+    }
+
+    // We don't want to focus the editor if it was shown because of the list being filtered,
+    // as the user might still be typing in the filter input.
+    if (options.reason !== "filter-auto") {
+      this.focus();
+    }
+  },
+
+  /**
+   * Toggled the disabled state of the underlying stylesheet.
+   */
+  async toggleDisabled() {
+    const styleSheetsFront = await this._getStyleSheetsFront();
+    styleSheetsFront.toggleDisabled(this.resourceId).catch(console.error);
+  },
+
+  /**
+   * Queue a throttled task to update the live style sheet.
+   */
+  updateStyleSheet() {
+    if (this._updateTask) {
+      // cancel previous queued task not executed within throttle delay
+      this._window.clearTimeout(this._updateTask);
+    }
+
+    this._updateTask = this._window.setTimeout(
+      this._updateStyleSheet,
+      UPDATE_STYLESHEET_DELAY
+    );
+  },
+
+  /**
+   * Update live style sheet according to modifications.
+   */
+  async _updateStyleSheet() {
+    if (this.styleSheet.disabled) {
+      // TODO: do we want to do this?
+      return;
+    }
+
+    if (this._justSetText) {
+      this._justSetText = false;
+      return;
+    }
+
+    // reset only if we actually perform an update
+    // (stylesheet is enabled) so that 'missed' updates
+    // while the stylesheet is disabled can be performed
+    // when it is enabled back. @see enableStylesheet
+    this._updateTask = null;
+
+    if (this.sourceEditor) {
+      this._state.text = this.sourceEditor.getText();
+    }
+
+    try {
+      const styleSheetsFront = await this._getStyleSheetsFront();
+      await styleSheetsFront.update(
+        this.resourceId,
+        this._state.text,
+        this.transitionsEnabled,
+        STYLE_SHEET_UPDATE_CAUSED_BY_STYLE_EDITOR
+      );
+
+      // Clear any existing mappings from automatic CSS prettification
+      // because they were likely invalided by manually editing the stylesheet.
+      this._mappings = null;
+    } catch (e) {
+      console.error(e);
+    }
+  },
+
+  /**
+   * Handle mousemove events, calling _highlightSelectorAt after a delay only
+   * and reseting the delay everytime.
+   */
+  _onMouseMove(e) {
+    // As we only want to hide an existing highlighter, we can use this.highlighter directly
+    // (and not this.getHighlighter).
+    if (this.highlighter) {
+      this.highlighter.hide();
+    }
+
+    if (this.mouseMoveTimeout) {
+      this._window.clearTimeout(this.mouseMoveTimeout);
+      this.mouseMoveTimeout = null;
+    }
+
+    this.mouseMoveTimeout = this._window.setTimeout(() => {
+      this._highlightSelectorAt(e.clientX, e.clientY);
+    }, SELECTOR_HIGHLIGHT_TIMEOUT);
+  },
+
+  /**
+   * Highlight nodes matching the selector found at coordinates x,y in the
+   * editor, if any.
+   *
+   * @param {Number} x
+   * @param {Number} y
+   */
+  async _highlightSelectorAt(x, y) {
+    const pos = this.sourceEditor.getPositionFromCoords({ left: x, top: y });
+    const info = this.sourceEditor.getInfoAt(pos);
+    if (!info || info.state !== "selector") {
+      return;
+    }
+
+    const onGetHighlighter = this.getHighlighter();
+    const walker = await this.getWalker();
+    const node = await walker.getStyleSheetOwnerNode(this.resourceId);
+
+    const highlighter = await onGetHighlighter;
+    await highlighter.show(node, {
+      selector: info.selector,
+      hideInfoBar: true,
+      showOnly: "border",
+      region: "border",
+    });
+
+    this.emit("node-highlighted");
+  },
+
+  /**
+   * Returns the walker front associated with this._resource target.
+   *
+   * @returns {Promise<WalkerFront>}
+   */
+  async getWalker() {
+    if (this.walker) {
+      return this.walker;
+    }
+
+    const { targetFront } = this._resource;
+    const inspectorFront = await targetFront.getFront("inspector");
+    this.walker = inspectorFront.walker;
+    return this.walker;
+  },
+
+  /**
+   * Returns or creates the selector highlighter associated with this._resource target.
+   *
+   * @returns {CustomHighlighterFront|null}
+   */
+  async getHighlighter() {
+    if (this.highlighter) {
+      return this.highlighter;
+    }
+
+    const walker = await this.getWalker();
+    try {
+      this.highlighter = await walker.parentFront.getHighlighterByType(
+        SELECTOR_HIGHLIGHTER_TYPE
+      );
+      return this.highlighter;
+    } catch (e) {
+      // The selectorHighlighter can't always be instantiated, for example
+      // it doesn't work with XUL windows (until bug 1094959 gets fixed);
+      // or the selectorHighlighter doesn't exist on the backend.
+      console.warn(
+        "The selectorHighlighter couldn't be instantiated, " +
+          "elements matching hovered selectors will not be highlighted"
+      );
+    }
+    return null;
+  },
+
+  /**
+   * Save the editor contents into a file and set savedFile property.
+   * A file picker UI will open if file is not set and editor is not headless.
+   *
+   * @param mixed file
+   *        Optional nsIFile or string representing the filename to save in the
+   *        background, no UI will be displayed.
+   *        If not specified, the original style sheet URI is used.
+   *        To implement 'Save' instead of 'Save as', you can pass
+   *        savedFile here.
+   * @param function(nsIFile aFile) callback
+   *        Optional callback called when the operation has finished.
+   *        aFile has the nsIFile object for saved file or null if the operation
+   *        has failed or has been canceled by the user.
+   * @see savedFile
+   */
+  saveToFile(file, callback) {
+    const onFile = returnFile => {
+      if (!returnFile) {
+        if (callback) {
+          callback(null);
+        }
+        return;
+      }
+
+      if (this.sourceEditor) {
+        this._state.text = this.sourceEditor.getText();
+      }
+
+      const ostream = lazy.FileUtils.openSafeFileOutputStream(returnFile);
+      const buffer = new TextEncoder().encode(this._state.text).buffer;
+      const istream = new lazy.BufferStream(buffer, 0, buffer.byteLength);
+
+      lazy.NetUtil.asyncCopy(istream, ostream, status => {
+        if (!Components.isSuccessCode(status)) {
+          if (callback) {
+            callback(null);
+          }
+          this.emit("error", { key: SAVE_ERROR });
+          return;
+        }
+        lazy.FileUtils.closeSafeFileOutputStream(ostream);
+
+        this.onFileSaved(returnFile);
+
+        if (callback) {
+          callback(returnFile);
+        }
+      });
+    };
+
+    let defaultName;
+    if (this._friendlyName) {
+      defaultName = PathUtils.isAbsolute(this._friendlyName)
+        ? PathUtils.filename(this._friendlyName)
+        : this._friendlyName;
+    }
+    showFilePicker(
+      file || this._styleSheetFilePath,
+      true,
+      this._window,
+      onFile,
+      defaultName
+    );
+  },
+
+  /**
+   * Called when this source has been successfully saved to disk.
+   */
+  onFileSaved(returnFile) {
+    this._friendlyName = null;
+    this.savedFile = returnFile;
+
+    if (this.sourceEditor) {
+      this.sourceEditor.setClean();
+    }
+
+    this.emit("property-change");
+
+    // TODO: replace with file watching
+    this._modCheckCount = 0;
+    this._window.clearTimeout(this._timeout);
+
+    if (this.linkedCSSFile && !this.linkedCSSFileError) {
+      this._timeout = this._window.setTimeout(
+        this.checkLinkedFileForChanges,
+        CHECK_LINKED_SHEET_DELAY
+      );
+    }
+  },
+
+  /**
+   * Check to see if our linked CSS file has changed on disk, and
+   * if so, update the live style sheet.
+   */
+  checkLinkedFileForChanges() {
+    IOUtils.stat(this.linkedCSSFile).then(info => {
+      const lastChange = info.lastModified;
+
+      if (this._fileModDate && lastChange != this._fileModDate) {
+        this._fileModDate = lastChange;
+        this._modCheckCount = 0;
+
+        this.updateLinkedStyleSheet();
+        return;
+      }
+
+      if (++this._modCheckCount > MAX_CHECK_COUNT) {
+        this.updateLinkedStyleSheet();
+        return;
+      }
+
+      // try again in a bit
+      this._timeout = this._window.setTimeout(
+        this.checkLinkedFileForChanges,
+        CHECK_LINKED_SHEET_DELAY
+      );
+    }, this.markLinkedFileBroken);
+  },
+
+  /**
+   * Notify that the linked CSS file (if this is an original source)
+   * doesn't exist on disk in the place we think it does.
+   *
+   * @param string error
+   *        The error we got when trying to access the file.
+   */
+  markLinkedFileBroken(error) {
+    this.linkedCSSFileError = error || true;
+    this.emit("linked-css-file-error");
+
+    error +=
+      " querying " +
+      this.linkedCSSFile +
+      " original source location: " +
+      this.savedFile.path;
+    console.error(error);
+  },
+
+  /**
+   * For original sources (e.g. Sass files). Fetch contents of linked CSS
+   * file from disk and live update the stylesheet object with the contents.
+   */
+  updateLinkedStyleSheet() {
+    IOUtils.read(this.linkedCSSFile).then(async array => {
+      const decoder = new TextDecoder();
+      const text = decoder.decode(array);
+
+      // Ensure we don't re-fetch the text from the original source
+      // actor when we're notified that the style sheet changed.
+      const styleSheetsFront = await this._getStyleSheetsFront();
+
+      await styleSheetsFront.update(
+        this.resourceId,
+        text,
+        this.transitionsEnabled,
+        STYLE_SHEET_UPDATE_CAUSED_BY_STYLE_EDITOR
+      );
+    }, this.markLinkedFileBroken);
+  },
+
+  /**
+   * Retrieve custom key bindings objects as expected by Editor.
+   * Editor action names are not displayed to the user.
+   *
+   * @return {array} key binding objects for the source editor
+   */
+  _getKeyBindings() {
+    const saveStyleSheetKeybind = Editor.accel(
+      getString("saveStyleSheet.commandkey")
+    );
+    const focusFilterInputKeybind = Editor.accel(
+      getString("focusFilterInput.commandkey")
+    );
+
+    return {
+      Esc: false,
+      [saveStyleSheetKeybind]: () => {
+        this.saveToFile(this.savedFile);
+      },
+      ["Shift-" + saveStyleSheetKeybind]: () => {
+        this.saveToFile();
+      },
+      // We can't simply ignore this (with `false`, or returning `CodeMirror.Pass`), as the
+      // event isn't received by the event listener in StyleSheetUI.
+      [focusFilterInputKeybind]: () => {
+        this.emit("filter-input-keyboard-shortcut");
+      },
+    };
+  },
+
+  _getStyleSheetsFront() {
+    return this._resource.targetFront.getFront("stylesheets");
+  },
+
+  /**
+   * Clean up for this editor.
+   */
+  destroy() {
+    if (this._sourceEditor) {
+      this._sourceEditor.off("dirty-change", this.onPropertyChange);
+      this._sourceEditor.off("saveRequested", this.saveToFile);
+      this._sourceEditor.off("change", this.updateStyleSheet);
+      if (this._sourceEditor.container?.contentWindow) {
+        this._sourceEditor.container.contentWindow.removeEventListener(
+          "mousemove",
+          this._onMouseMove
+        );
+      }
+      this._sourceEditor.destroy();
+    }
+    this._isDestroyed = true;
+  },
+};
+
+/**
+ * Find a path on disk for a file given it's hosted uri, the uri of the
+ * original resource that generated it (e.g. Sass file), and the location of the
+ * local file for that source.
+ *
+ * @param {nsIURI} uri
+ *        The uri of the resource
+ * @param {nsIURI} origUri
+ *        The uri of the original source for the resource
+ * @param {nsIFile} file
+ *        The local file for the resource on disk
+ *
+ * @return {string}
+ *         The path of original file on disk
+ */
+function findLinkedFilePath(uri, origUri, file) {
+  const { origBranch, branch } = findUnsharedBranches(origUri, uri);
+  const project = findProjectPath(file, origBranch);
+
+  const parts = project.concat(branch);
+  const path = PathUtils.join.apply(this, parts);
+
+  return path;
+}
+
+/**
+ * Find the path of a project given a file in the project and its branch
+ * off the root. e.g.:
+ * /Users/moz/proj/src/a.css" and "src/a.css"
+ * would yield ["Users", "moz", "proj"]
+ *
+ * @param {nsIFile} file
+ *        file for that resource on disk
+ * @param {array} branch
+ *        path parts for branch to chop off file path.
+ * @return {array}
+ *        array of path parts
+ */
+function findProjectPath(file, branch) {
+  const path = PathUtils.split(file.path);
+
+  for (let i = 2; i <= branch.length; i++) {
+    // work backwards until we find a differing directory name
+    if (path[path.length - i] != branch[branch.length - i]) {
+      return path.slice(0, path.length - i + 1);
+    }
+  }
+
+  // if we don't find a differing directory, just chop off the branch
+  return path.slice(0, path.length - branch.length);
+}
+
+/**
+ * Find the parts of a uri past the root it shares with another uri. e.g:
+ * "http://localhost/built/a.scss" and "http://localhost/src/a.css"
+ * would yield ["built", "a.scss"] and ["src", "a.css"]
+ *
+ * @param {nsIURI} origUri
+ *        uri to find unshared branch of. Usually is uri for original source.
+ * @param {nsIURI} uri
+ *        uri to compare against to get a shared root
+ * @return {object}
+ *         object with 'branch' and 'origBranch' array of path parts for branch
+ */
+function findUnsharedBranches(origUri, uri) {
+  origUri = PathUtils.split(origUri.pathQueryRef);
+  uri = PathUtils.split(uri.pathQueryRef);
+
+  for (let i = 0; i < uri.length - 1; i++) {
+    if (uri[i] != origUri[i]) {
+      return {
+        branch: uri.slice(i),
+        origBranch: origUri.slice(i),
+      };
+    }
+  }
+  return {
+    branch: uri,
+    origBranch: origUri,
+  };
+}
+
+/**
+ * Remove the query string from a url.
+ *
+ * @param  {string} href
+ *         Url to remove query string from
+ * @return {string}
+ *         Url without query string
+ */
+function removeQuery(href) {
+  return href.replace(/\?.*/, "");
+}
diff --git a/devtools/client/styleeditor/index.xhtml b/devtools/client/styleeditor/index.xhtml
new file mode 100644
index 0000000000..9178f7c2f5
--- /dev/null
+++ b/devtools/client/styleeditor/index.xhtml
@@ -0,0 +1,238 @@
+<?xml version="1.0"?>
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
+<!DOCTYPE window>
+
+<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
+<?xml-stylesheet href="chrome://devtools/content/shared/widgets/widgets.css" type="text/css"?>
+<?xml-stylesheet href="chrome://devtools/content/shared/toolbarbutton.css" type="text/css"?>
+<?xml-stylesheet href="chrome://devtools/skin/chart.css" type="text/css"?>
+<?xml-stylesheet href="chrome://devtools/skin/widgets.css" type="text/css"?>
+<?xml-stylesheet href="chrome://devtools/skin/splitview.css" type="text/css"?>
+<?xml-stylesheet href="chrome://devtools/skin/styleeditor.css" type="text/css"?>
+
+<window
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+  xmlns:html="http://www.w3.org/1999/xhtml"
+  id="style-editor-chrome-window"
+>
+  <linkset>
+    <html:link rel="localization" href="toolkit/global/textActions.ftl" />
+    <html:link rel="localization" href="devtools/client/styleeditor.ftl" />
+  </linkset>
+
+  <script src="chrome://devtools/content/shared/theme-switching.js" />
+  <script src="chrome://global/content/globalOverlay.js" />
+  <script src="chrome://browser/content/utilityOverlay.js" />
+  <script src="chrome://global/content/editMenuOverlay.js" />
+  <script>
+    "use strict";
+    /* import-globals-from ../../../toolkit/content/globalOverlay.js */
+    /* import-globals-from ../../../toolkit/content/editMenuOverlay.js */
+    /* exported goUpdateSourceEditorMenuItems */
+    function goUpdateSourceEditorMenuItems() {
+      goUpdateGlobalEditMenuItems();
+
+      [
+        "cmd_undo",
+        "cmd_redo",
+        "cmd_cut",
+        "cmd_paste",
+        "cmd_delete",
+        "cmd_find",
+        "cmd_findAgain",
+      ].forEach(goUpdateCommand);
+    }
+  </script>
+
+  <popupset id="style-editor-popups">
+    <menupopup
+      id="sourceEditorContextMenu"
+      incontentshell="false"
+      onpopupshowing="goUpdateSourceEditorMenuItems()"
+    >
+      <menuitem
+        id="cMenu_undo"
+        data-l10n-id="text-action-undo"
+        command="cmd_undo"
+      />
+      <menuseparator />
+      <menuitem
+        id="cMenu_cut"
+        data-l10n-id="text-action-cut"
+        command="cmd_cut"
+      />
+      <menuitem
+        id="cMenu_copy"
+        data-l10n-id="text-action-copy"
+        command="cmd_copy"
+      />
+      <menuitem
+        id="cMenu_paste"
+        data-l10n-id="text-action-paste"
+        command="cmd_paste"
+      />
+      <menuitem
+        id="cMenu_delete"
+        data-l10n-id="text-action-delete"
+        command="cmd_delete"
+      />
+      <menuseparator />
+      <menuitem
+        id="cMenu_selectAll"
+        data-l10n-id="text-action-select-all"
+        command="cmd_selectAll"
+      />
+      <menuseparator />
+      <menuitem
+        id="se-menu-find"
+        data-l10n-id="styleeditor-find"
+        command="cmd_find"
+      />
+      <menuitem
+        id="cMenu_findAgain"
+        data-l10n-id="styleeditor-find-again"
+        command="cmd_findAgain"
+      />
+      <menuseparator />
+      <menuitem
+        id="se-menu-gotoLine"
+        data-l10n-id="styleeditor-go-to-line"
+        command="cmd_gotoLine"
+      />
+    </menupopup>
+    <menupopup id="sidebar-context" incontentshell="false">
+      <menuitem
+        id="context-openlinknewtab"
+        data-l10n-id="styleeditor-open-link-new-tab"
+      />
+      <menuitem id="context-copyurl" data-l10n-id="styleeditor-copy-url" />
+    </menupopup>
+  </popupset>
+
+  <commandset id="sourceEditorCommands">
+    <command id="cmd_gotoLine" oncommand="goDoCommand('cmd_gotoLine')" />
+    <command id="cmd_find" oncommand="goDoCommand('cmd_find')" />
+    <command id="cmd_findAgain" oncommand="goDoCommand('cmd_findAgain')" />
+  </commandset>
+
+  <keyset id="sourceEditorKeys" />
+
+  <box
+    id="style-editor-chrome"
+    class="devtools-responsive-container loading theme-body"
+    context="sidebar-context"
+  >
+    <box class="splitview-controller">
+      <box class="splitview-main">
+        <toolbar class="devtools-toolbar">
+          <toolbarbutton
+            class="style-editor-newButton devtools-toolbarbutton"
+            data-l10n-id="styleeditor-new-button"
+          />
+          <toolbarbutton
+            class="style-editor-importButton devtools-toolbarbutton"
+            data-l10n-id="styleeditor-import-button"
+          />
+          <toolbaritem class="devtools-searchbox" flex="1">
+            <html:input
+              class="devtools-filterinput"
+              data-l10n-id="styleeditor-filter-input"
+            />
+            <html:button
+              class="devtools-searchinput-clear"
+              tabindex="-1"
+              hidden=""
+            ></html:button>
+          </toolbaritem>
+          <toolbarbutton
+            id="style-editor-options"
+            class="devtools-toolbarbutton devtools-option-toolbarbutton"
+            data-l10n-id="styleeditor-options-button"
+          />
+        </toolbar>
+      </box>
+      <box
+        id="splitview-resizer-target"
+        class="theme-sidebar splitview-nav-container"
+        persist="height"
+      >
+        <html:ol class="splitview-nav" tabindex="0"></html:ol>
+        <html:div class="splitview-nav placeholder empty">
+          <html:p>
+            <html:strong data-l10n-id="styleeditor-no-stylesheet"></html:strong>
+          </html:p>
+          <html:p data-l10n-id="styleeditor-no-stylesheet-tip">
+            <html:a
+              class="style-editor-newButton"
+              data-l10n-name="append-new-stylesheet"
+              href="#"
+            />
+          </html:p>
+        </html:div>
+        <html:div class="splitview-nav placeholder all-filtered">
+          <html:p data-l10n-id="styleeditor-stylesheet-all-filtered"></html:p>
+        </html:div>
+      </box>
+    </box>
+    <splitter
+      class="devtools-side-splitter devtools-invisible-splitter"
+      resizebefore="sibling"
+      resizeafter="none"
+    />
+    <box class="splitview-side-details devtools-main-content" />
+
+    <html:div id="splitview-templates" hidden="">
+      <html:li id="splitview-tpl-summary-stylesheet" tabindex="0">
+        <label
+          class="stylesheet-toggle"
+          tabindex="0"
+          data-l10n-id="styleeditor-visibility-toggle"
+        ></label>
+        <html:hgroup class="stylesheet-info">
+          <html:h1
+            ><html:a class="stylesheet-name" tabindex="0"
+              ><label crop="center" /></html:a
+          ></html:h1>
+          <html:div class="stylesheet-more">
+            <html:h3 class="stylesheet-title"></html:h3>
+            <html:h3 class="stylesheet-linked-file"></html:h3>
+            <html:h3 class="stylesheet-rule-count"></html:h3>
+            <spacer />
+            <html:h3
+              ><label
+                class="stylesheet-saveButton"
+                data-l10n-id="styleeditor-save-button"
+              ></label
+            ></html:h3>
+          </html:div>
+        </html:hgroup>
+      </html:li>
+
+      <box id="splitview-tpl-details-stylesheet" class="splitview-details">
+        <hbox class="stylesheet-details-container">
+          <box
+            class="stylesheet-editor-input textbox"
+            data-l10n-id="styleeditor-editor-textbox"
+          />
+          <splitter
+            class="devtools-side-splitter"
+            resizebefore="none"
+            resizeafter="sibling"
+          />
+          <vbox class="stylesheet-sidebar theme-sidebar" hidden="true">
+            <toolbar
+              class="devtools-toolbar"
+              data-l10n-id="styleeditor-at-rules"
+            >
+            </toolbar>
+            <vbox class="stylesheet-at-rules-container" flex="1">
+              <html:div class="stylesheet-at-rules-list" />
+            </vbox>
+          </vbox>
+        </hbox>
+      </box>
+    </html:div>
+  </box>
+</window>
diff --git a/devtools/client/styleeditor/moz.build b/devtools/client/styleeditor/moz.build
new file mode 100644
index 0000000000..4c5e58e0c1
--- /dev/null
+++ b/devtools/client/styleeditor/moz.build
@@ -0,0 +1,18 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+BROWSER_CHROME_MANIFESTS += ["test/browser.ini"]
+
+DevToolsModules(
+    "original-source.js",
+    "panel.js",
+    "StyleEditorUI.sys.mjs",
+    "StyleEditorUtil.sys.mjs",
+    "StyleSheetEditor.sys.mjs",
+)
+
+with Files("**"):
+    BUG_COMPONENT = ("DevTools", "Style Editor")
diff --git a/devtools/client/styleeditor/original-source.js b/devtools/client/styleeditor/original-source.js
new file mode 100644
index 0000000000..1c01ae0355
--- /dev/null
+++ b/devtools/client/styleeditor/original-source.js
@@ -0,0 +1,103 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+/**
+ * An object of this type represents an original source for the style
+ * editor.  An "original" source is one that is mentioned in a source
+ * map.
+ *
+ * @param {String} url
+ *        The URL of the original source.
+ * @param {String} sourceID
+ *        The source ID of the original source, as used by the source
+ *        map service.
+ * @param {SourceMapLoader} sourceMapLoader
+ *        The source map loader; @see Toolbox.sourceMapLoader
+ */
+function OriginalSource(url, sourceId, sourceMapLoader) {
+  this.isOriginalSource = true;
+
+  this._url = url;
+  this._sourceId = sourceId;
+  this._sourceMapLoader = sourceMapLoader;
+}
+
+OriginalSource.prototype = {
+  get sourceId() {
+    return this._sourceId;
+  },
+
+  /** Get the original source's URL.  */
+  get url() {
+    return this._url;
+  },
+
+  /** Get the original source's URL.  */
+  get href() {
+    return this._url;
+  },
+
+  /**
+   * Return a promise that will resolve to the original source's full
+   * text.  The return result is actually an object with a single
+   * `string` method; this method will return the source text as a
+   * string.  This is done because the style editor elsewhere expects
+   * a long string actor.
+   */
+  getText() {
+    if (!this._sourcePromise) {
+      this._sourcePromise = this._sourceMapLoader
+        .getOriginalSourceText(this._sourceId)
+        .then(contents => {
+          // Make it look like a long string actor.
+          return {
+            string: () => contents.text,
+          };
+        });
+    }
+    return this._sourcePromise;
+  },
+
+  /**
+   * Given a source-mapped, generated style sheet, a line, and a
+   * column, return the corresponding original location in this style
+   * sheet.
+   *
+   * @param {StyleSheetResource} relatedSheet
+   *        The generated style sheet's resource
+   * @param {Number} line
+   *        Line number.
+   * @param {Number} column
+   *        Column number.
+   * @return {Location}
+   *        The original location, an object with at least
+   *        `sourceUrl`, `source`, `styleSheet`, `line`, and `column`
+   *        properties.
+   */
+  getOriginalLocation(relatedSheet, line, column) {
+    const { href, nodeHref, resourceId: sourceId } = relatedSheet;
+    const sourceUrl = href || nodeHref;
+    return this._sourceMapLoader
+      .getOriginalLocation({
+        sourceId,
+        line,
+        column,
+        sourceUrl,
+      })
+      .then(location => {
+        // Add some properties for the style editor.
+        location.source = location.sourceUrl;
+        location.styleSheet = relatedSheet;
+        return location;
+      });
+  },
+
+  // Dummy implementations, as we never emit an event.
+  on() {},
+  off() {},
+};
+
+exports.OriginalSource = OriginalSource;
diff --git a/devtools/client/styleeditor/panel.js b/devtools/client/styleeditor/panel.js
new file mode 100644
index 0000000000..46ea6c28c0
--- /dev/null
+++ b/devtools/client/styleeditor/panel.js
@@ -0,0 +1,171 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+var { XPCOMUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/XPCOMUtils.sys.mjs"
+);
+var EventEmitter = require("resource://devtools/shared/event-emitter.js");
+
+var { StyleEditorUI } = ChromeUtils.importESModule(
+  "resource://devtools/client/styleeditor/StyleEditorUI.sys.mjs"
+);
+var { getString } = ChromeUtils.importESModule(
+  "resource://devtools/client/styleeditor/StyleEditorUtil.sys.mjs"
+);
+
+var StyleEditorPanel = function StyleEditorPanel(panelWin, toolbox, commands) {
+  EventEmitter.decorate(this);
+
+  this._toolbox = toolbox;
+  this._commands = commands;
+  this._panelWin = panelWin;
+  this._panelDoc = panelWin.document;
+
+  this._showError = this._showError.bind(this);
+};
+
+exports.StyleEditorPanel = StyleEditorPanel;
+
+StyleEditorPanel.prototype = {
+  get panelWindow() {
+    return this._panelWin;
+  },
+
+  /**
+   * open is effectively an asynchronous constructor
+   */
+  async open(options) {
+    // Initialize the CSS properties database.
+    const { cssProperties } = await this._toolbox.target.getFront(
+      "cssProperties"
+    );
+
+    // Initialize the UI
+    this.UI = new StyleEditorUI(
+      this._toolbox,
+      this._commands,
+      this._panelDoc,
+      cssProperties
+    );
+    this.UI.on("error", this._showError);
+    await this.UI.initialize(options);
+
+    return this;
+  },
+
+  /**
+   * Show an error message from the style editor in the toolbox
+   * notification box.
+   *
+   * @param  {string} data
+   *         The parameters to customize the error message
+   */
+  _showError(data) {
+    if (!this._toolbox) {
+      // could get an async error after we've been destroyed
+      return;
+    }
+
+    let errorMessage = getString(data.key);
+    if (data.append) {
+      errorMessage += " " + data.append;
+    }
+
+    const notificationBox = this._toolbox.getNotificationBox();
+    const notification =
+      notificationBox.getNotificationWithValue("styleeditor-error");
+
+    let level = notificationBox.PRIORITY_CRITICAL_LOW;
+    if (data.level === "info") {
+      level = notificationBox.PRIORITY_INFO_LOW;
+    } else if (data.level === "warning") {
+      level = notificationBox.PRIORITY_WARNING_LOW;
+    }
+
+    if (!notification) {
+      notificationBox.appendNotification(
+        errorMessage,
+        "styleeditor-error",
+        "",
+        level
+      );
+    }
+  },
+
+  /**
+   * Select a stylesheet.
+   *
+   * @param {StyleSheetResource} stylesheet
+   *        The resource for the stylesheet to find and select in editor.
+   * @param {number} line
+   *        Line number to jump to after selecting. One-indexed
+   * @param {number} col
+   *        Column number to jump to after selecting. One-indexed
+   * @return {Promise}
+   *         Promise that will resolve when the editor is selected and ready
+   *         to be used.
+   */
+  selectStyleSheet(stylesheet, line, col) {
+    if (!this.UI) {
+      return null;
+    }
+
+    return this.UI.selectStyleSheet(stylesheet, line - 1, col ? col - 1 : 0);
+  },
+
+  /**
+   * Given a location in an original file, open that file in the editor.
+   *
+   * @param {string} originalId
+   *        The original "sourceId" returned from the sourcemap worker.
+   * @param {number} line
+   *        Line number to jump to after selecting. One-indexed
+   * @param {number} col
+   *        Column number to jump to after selecting. One-indexed
+   * @return {Promise}
+   *         Promise that will resolve when the editor is selected and ready
+   *         to be used.
+   */
+  selectOriginalSheet(originalId, line, col) {
+    if (!this.UI) {
+      return null;
+    }
+
+    const originalSheet = this.UI.getOriginalSourceSheet(originalId);
+    return this.UI.selectStyleSheet(originalSheet, line - 1, col ? col - 1 : 0);
+  },
+
+  getStylesheetResourceForGeneratedURL(url) {
+    if (!this.UI) {
+      return null;
+    }
+
+    return this.UI.getStylesheetResourceForGeneratedURL(url);
+  },
+
+  /**
+   * Destroy the style editor.
+   */
+  destroy() {
+    if (this._destroyed) {
+      return;
+    }
+    this._destroyed = true;
+
+    this._toolbox = null;
+    this._panelWin = null;
+    this._panelDoc = null;
+
+    this.UI.destroy();
+    this.UI = null;
+  },
+};
+
+XPCOMUtils.defineLazyGetter(StyleEditorPanel.prototype, "strings", function () {
+  return Services.strings.createBundle(
+    "chrome://devtools/locale/styleeditor.properties"
+  );
+});
diff --git a/devtools/client/styleeditor/test/autocomplete.html b/devtools/client/styleeditor/test/autocomplete.html
new file mode 100644
index 0000000000..801eb4d4b9
--- /dev/null
+++ b/devtools/client/styleeditor/test/autocomplete.html
@@ -0,0 +1,23 @@
+<!doctype html>
+<html>
+<head>
+  <title>testcase for autocomplete testing</title>
+  <link rel="stylesheet" type="text/css" href="resources_inpage1.css"/>
+  <style type="text/css">
+  div {
+    font-size: 4em;
+  }
+
+  div > span {
+     text-decoration: underline;
+  }
+
+  div + button {
+    border: 2px dotted red;
+  }
+  </style>
+</head>
+<body>
+  <div>parent <span>child</span></div><button>sibling</button>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/browser.ini b/devtools/client/styleeditor/test/browser.ini
new file mode 100644
index 0000000000..089f1b26e0
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser.ini
@@ -0,0 +1,141 @@
+[DEFAULT]
+tags = devtools
+subsuite = devtools
+support-files =
+  autocomplete.html
+  bug_1405342_serviceworker_iframes.html
+  four.html
+  head.js
+  iframe_with_service_worker.html
+  iframe_service_worker.js
+  import.css
+  import.html
+  import2.css
+  inline-1.html
+  inline-2.html
+  longload.html
+  longname.html
+  many-media-rules-sourcemaps/index.html
+  many-media-rules-sourcemaps/sourcemap/sourcemap-css/sourcemaps.css
+  many-media-rules-sourcemaps/sourcemap/sourcemap-css/sourcemaps.css.map
+  many-media-rules-sourcemaps/sourcemap/sourcemap-sass/_partial.scss
+  many-media-rules-sourcemaps/sourcemap/sourcemap-sass/sourcemaps.scss
+  media-small.css
+  media.html
+  media-rules.html
+  media-rules.css
+  media-rules-sourcemaps.html
+  minified.html
+  missing.html
+  nostyle.html
+  pretty.css
+  resources_inpage.jsi
+  resources_inpage1.css
+  resources_inpage2.css
+  selector-highlighter.html
+  simple.css
+  simple.css.gz
+  simple.css.gz^headers^
+  simple.gz.html
+  simple.html
+  sjs_huge-css-server.sjs
+  sourcemap-css/contained.css
+  sourcemap-css/sourcemaps.css
+  sourcemap-css/sourcemaps_chrome.css
+  sourcemap-css/sourcemaps.css.map
+  # add nosniff header to test against Bug 1330383
+  sourcemap-css/sourcemaps.css.map^headers^
+  sourcemap-css/media-rules.css
+  sourcemap-css/media-rules.css.map
+  sourcemap-css/test-bootstrap-scss.css
+  sourcemap-css/test-stylus.css
+  sourcemap-sass/sourcemaps.scss
+  # add nosniff header to test against Bug 1330383
+  sourcemap-sass/sourcemaps.scss^headers^
+  sourcemap-sass/media-rules.scss
+  sourcemap-styl/test-stylus.styl
+  sourcemaps.html
+  sourcemaps-inline.html
+  sourcemaps-large.html
+  sourcemaps-watching.html
+  test_private.css
+  test_private.html
+  doc_empty.html
+  doc_fetch_from_netmonitor.html
+  doc_long_string.css
+  doc_long.css
+  doc_short_string.css
+  doc_sourcemap_chrome.html
+  doc_xulpage.xhtml
+  sync.html
+  sync_with_csp.css
+  sync_with_csp.html
+  utf-16.css
+  veryveryverylongnamethatcanbreakthestyleeditor.css
+  !/devtools/client/framework/browser-toolbox/test/helpers-browser-toolbox.js
+  !/devtools/client/inspector/shared/test/head.js
+  !/devtools/client/inspector/test/head.js
+  !/devtools/client/inspector/test/shared-head.js
+  !/devtools/client/shared/test/shared-head.js
+  !/devtools/client/shared/test/telemetry-test-helpers.js
+  !/devtools/client/shared/test/highlighter-test-actor.js
+
+[browser_styleeditor_add_stylesheet.js]
+[browser_styleeditor_at_rules_sidebar.js]
+[browser_styleeditor_autocomplete-disabled.js]
+[browser_styleeditor_autocomplete.js]
+[browser_styleeditor_bom.js]
+[browser_styleeditor_bug_1247083_inline_stylesheet_numbering.js]
+[browser_styleeditor_bug_1405342_serviceworker_iframes.js]
+skip-if = !debug && (os == "win") || (os == "linux" && os_version == "18.04") #bug 1424914
+[browser_styleeditor_bug_740541_iframes.js]
+[browser_styleeditor_bug_851132_middle_click.js]
+[browser_styleeditor_bug_870339.js]
+[browser_styleeditor_copyurl.js]
+[browser_styleeditor_enabled.js]
+[browser_styleeditor_fetch-from-netmonitor.js]
+skip-if = http3 # Bug 1829298
+[browser_styleeditor_filesave.js]
+skip-if = http3 # Bug 1829298
+[browser_styleeditor_filter.js]
+[browser_styleeditor_fission_switch_target.js]
+[browser_styleeditor_highlight-selector.js]
+[browser_styleeditor_import.js]
+[browser_styleeditor_import_rule.js]
+[browser_styleeditor_init.js]
+[browser_styleeditor_inline_friendly_names.js]
+[browser_styleeditor_loading.js]
+skip-if = http3 # Bug 1829298
+[browser_styleeditor_loading_with_containers.js]
+[browser_styleeditor_media_sidebar_links.js]
+[browser_styleeditor_media_sidebar_sourcemaps.js]
+[browser_styleeditor_missing_stylesheet.js]
+[browser_styleeditor_navigate.js]
+[browser_styleeditor_new.js]
+[browser_styleeditor_nostyle.js]
+[browser_styleeditor_opentab.js]
+[browser_styleeditor_pretty.js]
+[browser_styleeditor_private_perwindowpb.js]
+[browser_styleeditor_reload.js]
+[browser_styleeditor_resize_performance.js]
+[browser_styleeditor_scroll.js]
+[browser_styleeditor_selectstylesheet.js]
+[browser_styleeditor_sidebars.js]
+[browser_styleeditor_sourcemap_chrome.js]
+[browser_styleeditor_sourcemap_large.js]
+[browser_styleeditor_sourcemap_watching.js]
+skip-if = http3 # Bug 1829298
+[browser_styleeditor_sourcemaps.js]
+[browser_styleeditor_sourcemaps_inline.js]
+[browser_styleeditor_sv_keynav.js]
+[browser_styleeditor_sv_resize.js]
+[browser_styleeditor_sync.js]
+[browser_styleeditor_syncAddProperty.js]
+[browser_styleeditor_syncAddRule.js]
+[browser_styleeditor_syncAlreadyOpen.js]
+[browser_styleeditor_syncEditSelector.js]
+[browser_styleeditor_syncIntoRuleView.js]
+[browser_styleeditor_transition_rule.js]
+[browser_styleeditor_xul.js]
+[browser_toolbox_styleeditor.js]
+skip-if = asan # Bug 1591064
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_add_stylesheet.js b/devtools/client/styleeditor/test/browser_styleeditor_add_stylesheet.js
new file mode 100644
index 0000000000..794de2c328
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_add_stylesheet.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that a newly-added style sheet shows up in the style editor.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 2, "Two sheets present after load.");
+
+  // We have to wait for the length to change, because we might still
+  // be seeing events from the initial open.
+  const added = new Promise(resolve => {
+    const handler = () => {
+      if (ui.editors.length === 3) {
+        ui.off("editor-added", handler);
+        resolve();
+      }
+    };
+    ui.on("editor-added", handler);
+  });
+
+  info("Adding a style sheet");
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
+    const document = content.document;
+    const style = document.createElement("style");
+    style.appendChild(document.createTextNode("div { background: #f06; }"));
+    document.head.appendChild(style);
+  });
+  await added;
+
+  is(ui.editors.length, 3, "Three sheets present after new style sheet");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_at_rules_sidebar.js b/devtools/client/styleeditor/test/browser_styleeditor_at_rules_sidebar.js
new file mode 100644
index 0000000000..6a7c7cc4b8
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_at_rules_sidebar.js
@@ -0,0 +1,312 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// https rather than chrome to improve coverage
+const TESTCASE_URI = TEST_BASE_HTTPS + "media-rules.html";
+const SIDEBAR_PREF = "devtools.styleeditor.showAtRulesSidebar";
+
+const RESIZE_W = 300;
+const RESIZE_H = 450;
+const LABELS = [
+  "not all",
+  "all",
+  "(max-width: 550px)",
+  "(min-height: 300px) and (max-height: 320px)",
+  "(max-width: 750px)",
+  "print",
+];
+const LINE_NOS = [1, 7, 19, 25, 31, 36];
+const NEW_RULE = `
+  @media (max-width: 750px) {
+    div {
+      color: blue;
+    }
+
+    @media print {
+      body {
+        filter: grayscale(100%);
+      }
+    }
+  }`;
+
+waitForExplicitFinish();
+
+add_task(async function () {
+  await pushPref("layout.css.container-queries.enabled", true);
+
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 4, "correct number of editors");
+
+  info("Test first plain css editor");
+  const plainEditor = ui.editors[0];
+  await openEditor(plainEditor);
+  testPlainEditor(plainEditor);
+
+  info("Test editor for inline sheet with @media rules");
+  const inlineMediaEditor = ui.editors[3];
+  await openEditor(inlineMediaEditor);
+  await testInlineMediaEditor(ui, inlineMediaEditor);
+
+  info("Test editor with @media rules");
+  const mediaEditor = ui.editors[1];
+  await openEditor(mediaEditor);
+  await testMediaEditor(ui, mediaEditor);
+
+  info("Test that sidebar hides when flipping pref");
+  await testShowHide(ui, mediaEditor);
+
+  info("Test adding a rule updates the list");
+  await testMediaRuleAdded(ui, mediaEditor);
+
+  info("Test resizing and seeing @media matching state change");
+  const originalWidth = window.outerWidth;
+  const originalHeight = window.outerHeight;
+
+  const onMatchesChange = ui.once("at-rules-list-changed");
+  window.resizeTo(RESIZE_W, RESIZE_H);
+  await onMatchesChange;
+
+  testMediaMatchChanged(mediaEditor);
+
+  window.resizeTo(originalWidth, originalHeight);
+});
+
+function testPlainEditor(editor) {
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  is(sidebar.hidden, true, "sidebar is hidden on editor without @media");
+}
+
+async function testInlineMediaEditor(ui, editor) {
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  is(sidebar.hidden, false, "sidebar is showing on editor with @media");
+
+  const entries = sidebar.querySelectorAll(".at-rule-label");
+  is(entries.length, 5, "5 @media rules displayed in sidebar");
+
+  await testRule({
+    ui,
+    editor,
+    rule: entries[0],
+    conditionText: "screen",
+    matches: true,
+    line: 2,
+    type: "media",
+  });
+
+  await testRule({
+    ui,
+    editor,
+    rule: entries[1],
+    conditionText: "(display: flex)",
+    line: 7,
+    type: "support",
+  });
+
+  await testRule({
+    ui,
+    editor,
+    rule: entries[2],
+    conditionText: "(1px < height < 10000px)",
+    matches: true,
+    line: 8,
+    type: "media",
+  });
+
+  await testRule({
+    ui,
+    editor,
+    rule: entries[3],
+    conditionText: "",
+    line: 16,
+    type: "layer",
+    layerName: "myLayer",
+  });
+
+  await testRule({
+    ui,
+    editor,
+    rule: entries[4],
+    conditionText: "(min-width: 1px)",
+    line: 17,
+    type: "container",
+  });
+}
+
+async function testMediaEditor(ui, editor) {
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  is(sidebar.hidden, false, "sidebar is showing on editor with @media");
+
+  const entries = [...sidebar.querySelectorAll(".at-rule-label")];
+  is(entries.length, 4, "four @media rules displayed in sidebar");
+
+  await testRule({
+    ui,
+    editor,
+    rule: entries[0],
+    conditionText: LABELS[0],
+    matches: false,
+    line: LINE_NOS[0],
+  });
+  await testRule({
+    ui,
+    editor,
+    rule: entries[1],
+    conditionText: LABELS[1],
+    matches: true,
+    line: LINE_NOS[1],
+  });
+  await testRule({
+    ui,
+    editor,
+    rule: entries[2],
+    conditionText: LABELS[2],
+    matches: false,
+    line: LINE_NOS[2],
+  });
+  await testRule({
+    ui,
+    editor,
+    rule: entries[3],
+    conditionText: LABELS[3],
+    matches: false,
+    line: LINE_NOS[3],
+  });
+}
+
+function testMediaMatchChanged(editor) {
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+
+  const cond = sidebar.querySelectorAll(".at-rule-condition")[2];
+  is(
+    cond.textContent,
+    "(max-width: 550px)",
+    "third rule condition text is correct"
+  );
+  ok(
+    !cond.classList.contains("media-condition-unmatched"),
+    "media rule is now matched after resizing"
+  );
+}
+
+async function testShowHide(ui, editor) {
+  let sidebarChange = ui.once("at-rules-list-changed");
+  Services.prefs.setBoolPref(SIDEBAR_PREF, false);
+  await sidebarChange;
+
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  is(sidebar.hidden, true, "sidebar is hidden after flipping pref");
+
+  sidebarChange = ui.once("at-rules-list-changed");
+  Services.prefs.clearUserPref(SIDEBAR_PREF);
+  await sidebarChange;
+
+  is(sidebar.hidden, false, "sidebar is showing after flipping pref back");
+}
+
+async function testMediaRuleAdded(ui, editor) {
+  await editor.getSourceEditor();
+  let text = editor.sourceEditor.getText();
+  text += NEW_RULE;
+
+  const listChange = ui.once("at-rules-list-changed");
+  editor.sourceEditor.setText(text);
+  await listChange;
+
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  const entries = [...sidebar.querySelectorAll(".at-rule-label")];
+  is(entries.length, 6, "six @media rules after changing text");
+
+  await testRule({
+    ui,
+    editor,
+    rule: entries[4],
+    conditionText: LABELS[4],
+    matches: false,
+    line: LINE_NOS[4],
+  });
+
+  await testRule({
+    ui,
+    editor,
+    rule: entries[5],
+    conditionText: LABELS[5],
+    matches: false,
+    line: LINE_NOS[5],
+  });
+}
+
+/**
+ * Run assertion on given rule
+ *
+ * @param {Object} options
+ * @param {StyleEditorUI} options.ui
+ * @param {StyleSheetEditor} options.editor: The editor the rule is displayed in
+ * @param {Element} options.rule: The rule element in the media sidebar
+ * @param {String} options.conditionText: media query condition text
+ * @param {Boolean} options.matches: Whether or not the document matches the rule
+ * @param {String} options.layerName: Optional name of the @layer
+ * @param {Number} options.line: Line of the rule
+ * @param {String} options.type: The type of the rule (container, layer, media, support ).
+ *                               Defaults to "media".
+ */
+async function testRule({
+  ui,
+  editor,
+  rule,
+  conditionText,
+  matches,
+  layerName,
+  line,
+  type = "media",
+}) {
+  const atTypeEl = rule.querySelector(".at-rule-type");
+  is(
+    atTypeEl.textContent,
+    `@${type}\u00A0${layerName ? `${layerName}\u00A0` : ""}`,
+    "label for at-rule type is correct"
+  );
+
+  const cond = rule.querySelector(".at-rule-condition");
+  is(
+    cond.textContent,
+    conditionText,
+    "condition label is correct for " + conditionText
+  );
+
+  if (type == "media") {
+    const matched = !cond.classList.contains("media-condition-unmatched");
+    ok(
+      matches ? matched : !matched,
+      "media rule is " + (matches ? "matched" : "unmatched")
+    );
+  }
+
+  const ruleLine = rule.querySelector(".at-rule-line");
+  is(ruleLine.textContent, ":" + line, "correct line number shown");
+
+  info(
+    "Check that clicking on the rule jumps to the expected position in the stylesheet"
+  );
+  rule.click();
+  await waitFor(
+    () =>
+      ui.selectedEditor == editor &&
+      editor.sourceEditor.getCursor().line == line - 1
+  );
+  ok(true, "Jumped to the expected location");
+}
+
+/* Helpers */
+
+function openEditor(editor) {
+  getLinkFor(editor).click();
+
+  return editor.getSourceEditor();
+}
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_autocomplete-disabled.js b/devtools/client/styleeditor/test/browser_styleeditor_autocomplete-disabled.js
new file mode 100644
index 0000000000..fd7d4969d0
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_autocomplete-disabled.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that autocomplete can be disabled.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "autocomplete.html";
+
+// Pref which decides if CSS autocompletion is enabled in Style Editor or not.
+const AUTOCOMPLETION_PREF = "devtools.styleeditor.autocompletion-enabled";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+  const editor = await ui.editors[0].getSourceEditor();
+  editor.sourceEditor.setOption("autocomplete", false);
+
+  is(
+    editor.sourceEditor.getOption("autocomplete"),
+    false,
+    "Autocompletion option does not exist"
+  );
+  ok(
+    !editor.sourceEditor.getAutocompletionPopup(),
+    "Autocompletion popup does not exist"
+  );
+});
+
+add_task(async function () {
+  Services.prefs.setBoolPref(AUTOCOMPLETION_PREF, false);
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+  const editor = await ui.editors[0].getSourceEditor();
+
+  is(
+    editor.sourceEditor.getOption("autocomplete"),
+    false,
+    "Autocompletion option does not exist"
+  );
+});
+
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref(AUTOCOMPLETION_PREF);
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_autocomplete.js b/devtools/client/styleeditor/test/browser_styleeditor_autocomplete.js
new file mode 100644
index 0000000000..b1377c62ab
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_autocomplete.js
@@ -0,0 +1,284 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that autocompletion works as expected.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "autocomplete.html";
+const MAX_SUGGESTIONS = 15;
+
+// Test cases to test that autocompletion works correctly when enabled.
+// Format:
+// [
+//   key,
+//   {
+//     total: Number of suggestions in the popup (-1 if popup is closed),
+//     current: Index of selected suggestion,
+//     inserted: 1 to check whether the selected suggestion is inserted into the
+//               editor or not,
+//     entered: 1 if the suggestion is inserted and finalized
+//   }
+// ]
+
+function getTestCases(cssProperties) {
+  const keywords = getCSSKeywords(cssProperties);
+  const getSuggestionNumberFor = suggestionNumberGetter(keywords);
+
+  return [
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["Ctrl+Space", { total: 1, current: 0 }],
+    ["VK_LEFT"],
+    ["VK_RIGHT"],
+    ["VK_DOWN"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["Ctrl+Space", { total: getSuggestionNumberFor("font"), current: 0 }],
+    ["VK_END"],
+    ["VK_RETURN"],
+    ["b", { total: getSuggestionNumberFor("b"), current: 0 }],
+    ["a", { total: getSuggestionNumberFor("ba"), current: 0 }],
+    [
+      "VK_DOWN",
+      { total: getSuggestionNumberFor("ba"), current: 0, inserted: 1 },
+    ],
+    [
+      "VK_DOWN",
+      { total: getSuggestionNumberFor("ba"), current: 1, inserted: 1 },
+    ],
+    [
+      "VK_TAB",
+      { total: getSuggestionNumberFor("ba"), current: 2, inserted: 1 },
+    ],
+    ["VK_RETURN", { current: 2, inserted: 1, entered: 1 }],
+    ["b", { total: getSuggestionNumberFor("background", "b"), current: 0 }],
+    ["l", { total: getSuggestionNumberFor("background", "bl"), current: 0 }],
+    [
+      "VK_TAB",
+      {
+        total: getSuggestionNumberFor("background", "bl"),
+        current: 0,
+        inserted: 1,
+      },
+    ],
+    [
+      "VK_DOWN",
+      {
+        total: getSuggestionNumberFor("background", "bl"),
+        current: 1,
+        inserted: 1,
+      },
+    ],
+    [
+      "VK_UP",
+      {
+        total: getSuggestionNumberFor("background", "bl"),
+        current: 0,
+        inserted: 1,
+      },
+    ],
+    [
+      "VK_TAB",
+      {
+        total: getSuggestionNumberFor("background", "bl"),
+        current: 1,
+        inserted: 1,
+      },
+    ],
+    [
+      "VK_TAB",
+      {
+        total: getSuggestionNumberFor("background", "bl"),
+        current: 2,
+        inserted: 1,
+      },
+    ],
+    [";"],
+    ["VK_RETURN"],
+    ["c", { total: getSuggestionNumberFor("c"), current: 0 }],
+    ["o", { total: getSuggestionNumberFor("co"), current: 0 }],
+    ["VK_RETURN", { current: 0, inserted: 1 }],
+    ["r", { total: getSuggestionNumberFor("color", "r"), current: 0 }],
+    ["VK_RETURN", { current: 0, inserted: 1 }],
+    [";"],
+    ["VK_LEFT"],
+    ["VK_RIGHT"],
+    ["VK_DOWN"],
+    ["VK_RETURN"],
+    ["b", { total: 2, current: 0 }],
+    ["u", { total: 1, current: 0 }],
+    ["VK_RETURN", { current: 0, inserted: 1 }],
+    ["{"],
+    ["VK_HOME"],
+    ["VK_DOWN"],
+    ["VK_DOWN"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["VK_RIGHT"],
+    ["Ctrl+Space", { total: 1, current: 0 }],
+  ];
+}
+
+add_task(async function () {
+  // We try to type "background" above, so backdrop-filter enabledness affects
+  // the expectations. Instead of branching on the test set the pref to true
+  // here as that is the end state, and it doesn't interact with the test in
+  // other ways.
+  await SpecialPowers.pushPrefEnv({
+    set: [["layout.css.backdrop-filter.enabled", true]],
+  });
+  const { panel, ui } = await openStyleEditorForURL(TESTCASE_URI);
+  const { cssProperties } = ui;
+  const testCases = getTestCases(cssProperties);
+
+  await ui.selectStyleSheet(ui.editors[1].styleSheet);
+  const editor = await ui.editors[1].getSourceEditor();
+
+  const sourceEditor = editor.sourceEditor;
+  const popup = sourceEditor.getAutocompletionPopup();
+
+  await SimpleTest.promiseFocus(panel.panelWindow);
+
+  for (const index in testCases) {
+    await testState(testCases, index, sourceEditor, popup, panel.panelWindow);
+    await checkState(testCases, index, sourceEditor, popup);
+  }
+});
+
+function testState(testCases, index, sourceEditor, popup, panelWindow) {
+  let [key, details] = testCases[index];
+  let entered;
+  if (details) {
+    entered = details.entered;
+  }
+  const mods = {};
+
+  info(
+    "pressing key " +
+      key +
+      " to get result: " +
+      JSON.stringify(testCases[index]) +
+      " for index " +
+      index
+  );
+
+  let evt = "after-suggest";
+
+  if (key == "Ctrl+Space") {
+    key = " ";
+    mods.ctrlKey = true;
+  } else if (key == "VK_RETURN" && entered) {
+    evt = "popup-hidden";
+  } else if (
+    /(left|right|return|home|end)/gi.test(key) ||
+    (key == "VK_DOWN" && !popup.isOpen)
+  ) {
+    evt = "cursorActivity";
+  } else if (key == "VK_TAB" || key == "VK_UP" || key == "VK_DOWN") {
+    evt = "suggestion-entered";
+  }
+
+  const ready = sourceEditor.once(evt);
+  EventUtils.synthesizeKey(key, mods, panelWindow);
+
+  return ready;
+}
+
+function checkState(testCases, index, sourceEditor, popup) {
+  return new Promise(resolve => {
+    executeSoon(() => {
+      let [, details] = testCases[index];
+      details = details || {};
+      const { total, current, inserted } = details;
+
+      if (total != undefined) {
+        ok(popup.isOpen, "Popup is open for index " + index);
+        is(
+          total,
+          popup.itemCount,
+          "Correct total suggestions for index " + index
+        );
+        is(
+          current,
+          popup.selectedIndex,
+          "Correct index is selected for index " + index
+        );
+        if (inserted) {
+          const { text } = popup.getItemAtIndex(current);
+          const { line, ch } = sourceEditor.getCursor();
+          const lineText = sourceEditor.getText(line);
+          is(
+            lineText.substring(ch - text.length, ch),
+            text,
+            "Current suggestion from the popup is inserted into the editor."
+          );
+        }
+      } else {
+        ok(!popup.isOpen, "Popup is closed for index " + index);
+        if (inserted) {
+          const { text } = popup.getItemAtIndex(current);
+          const { line, ch } = sourceEditor.getCursor();
+          const lineText = sourceEditor.getText(line);
+          is(
+            lineText.substring(ch - text.length, ch),
+            text,
+            "Current suggestion from the popup is inserted into the editor."
+          );
+        }
+      }
+      resolve();
+    });
+  });
+}
+
+/**
+ * Returns a list of all property names and a map of property name vs possible
+ * CSS values provided by the Gecko engine.
+ *
+ * @return {Object} An object with following properties:
+ *         - CSSProperties {Array} Array of string containing all the possible
+ *                         CSS property names.
+ *         - CSSValues {Object|Map} A map where key is the property name and
+ *                     value is an array of string containing all the possible
+ *                     CSS values the property can have.
+ */
+function getCSSKeywords(cssProperties) {
+  const props = {};
+  const propNames = cssProperties.getNames();
+  propNames.forEach(prop => {
+    props[prop] = cssProperties.getValues(prop).sort();
+  });
+  return {
+    CSSValues: props,
+    CSSProperties: propNames.sort(),
+  };
+}
+
+/**
+ * Returns a function that returns the number of expected suggestions for the given
+ * property and value. If the value is not null, returns the number of values starting
+ * with `value`. Returns the number of properties starting with `property` otherwise.
+ */
+function suggestionNumberGetter({ CSSProperties, CSSValues }) {
+  return (property, value) => {
+    if (value == null) {
+      return CSSProperties.filter(prop => prop.startsWith(property)).slice(
+        0,
+        MAX_SUGGESTIONS
+      ).length;
+    }
+    return CSSValues[property]
+      .filter(val => val.startsWith(value))
+      .slice(0, MAX_SUGGESTIONS).length;
+  };
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_bom.js b/devtools/client/styleeditor/test/browser_styleeditor_bom.js
new file mode 100644
index 0000000000..863351a32c
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_bom.js
@@ -0,0 +1,37 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const BOM_CSS = TEST_BASE_HTTPS + "utf-16.css";
+const DOCUMENT =
+  "data:text/html;charset=UTF-8," +
+  encodeURIComponent(
+    [
+      "<!DOCTYPE html>",
+      "<html>",
+      " <head>",
+      "  <title>Bug 1301854</title>",
+      '  <link rel="stylesheet" type="text/css" href="' + BOM_CSS + '">',
+      " </head>",
+      " <body>",
+      " </body>",
+      "</html>",
+    ].join("\n")
+  );
+
+const CONTENTS =
+  "// Note that this file must be utf-16 with a " +
+  "BOM for the test to make sense.\n";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(DOCUMENT);
+
+  is(ui.editors.length, 1, "correct number of editors");
+
+  const editor = ui.editors[0];
+  await editor.getSourceEditor();
+
+  const text = editor.sourceEditor.getText();
+  is(text, CONTENTS, "editor contains expected text");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_bug_1247083_inline_stylesheet_numbering.js b/devtools/client/styleeditor/test/browser_styleeditor_bug_1247083_inline_stylesheet_numbering.js
new file mode 100644
index 0000000000..1f40d44cc1
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_bug_1247083_inline_stylesheet_numbering.js
@@ -0,0 +1,104 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that the displayed numbering of inline and user-created stylesheets are independent of their absolute index
+// See bug 1247083.
+
+const SIMPLE = TEST_BASE_HTTP + "simple.css";
+const LONG = TEST_BASE_HTTP + "doc_long.css";
+const DOCUMENT_WITH_LONG_SHEET =
+  "data:text/html;charset=UTF-8," +
+  encodeURIComponent(
+    [
+      "<!DOCTYPE html>",
+      "<html>",
+      " <head>",
+      "  <title>Style editor numbering test page</title>",
+
+      // first inline stylesheet
+      "  <style>",
+      "   #p-blue {",
+      "    color: blue;",
+      "   }",
+      "  </style>",
+      // first external stylesheet
+      '  <link rel="stylesheet" type="text/css" href="' + SIMPLE + '">',
+      // second external stylesheet
+      '  <link rel="stylesheet" type="text/css" href="' + LONG + '">',
+      // second inline stylesheet
+      "  <style>",
+      "   #p-green {",
+      "    color: green;",
+      "   }",
+      "   #p-red {",
+      "    color: red;",
+      "   }",
+      "  </style>",
+
+      " </head>",
+      " <body>",
+      " </body>",
+      "</html>",
+    ].join("\n")
+  );
+
+add_task(async function () {
+  info("Test that inline stylesheets are numbered correctly");
+  const { ui } = await openStyleEditorForURL(DOCUMENT_WITH_LONG_SHEET);
+
+  is(ui.editors.length, 4, "4 editors present.");
+
+  const firstEditor = ui.editors[0];
+  is(
+    firstEditor.styleSheetFriendlyIndex,
+    0,
+    "1st inline stylesheet's index is 0"
+  );
+
+  is(
+    firstEditor.styleSheet.styleSheetIndex,
+    0,
+    "1st inline stylesheet is also the first stylesheet declared"
+  );
+
+  is(firstEditor.styleSheet.ruleCount, 1, "1st inline stylesheet has 1 rule");
+
+  const secondEditor = ui.editors[3];
+  is(
+    secondEditor.styleSheetFriendlyIndex,
+    1,
+    "2nd inline stylesheet's index is 1"
+  );
+
+  is(
+    secondEditor.styleSheet.styleSheetIndex,
+    3,
+    "2nd inline stylesheet is the last stylesheet"
+  );
+
+  is(secondEditor.styleSheet.ruleCount, 2, "2nd inline stylesheet has 2 rules");
+});
+
+add_task(async function () {
+  info("Test that user-created stylesheets are numbered correctly");
+  const { panel, ui } = await openStyleEditorForURL(DOCUMENT_WITH_LONG_SHEET);
+  await createNewStyleSheet(ui, panel.panelWindow);
+  await createNewStyleSheet(ui, panel.panelWindow);
+
+  is(ui.editors.length, 6, "6 editors present.");
+
+  ok(ui.editors[4].isNew, "2nd to last editor is user-created");
+  is(
+    ui.editors[4].styleSheetFriendlyIndex,
+    0,
+    "2nd to last user created stylesheet's index is 0"
+  );
+
+  ok(ui.editors[5].isNew, "Last editor is user-created");
+  is(
+    ui.editors[5].styleSheetFriendlyIndex,
+    1,
+    "Last user created stylesheet's index is 1"
+  );
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_bug_1405342_serviceworker_iframes.js b/devtools/client/styleeditor/test/browser_styleeditor_bug_1405342_serviceworker_iframes.js
new file mode 100644
index 0000000000..cccd92fedd
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_bug_1405342_serviceworker_iframes.js
@@ -0,0 +1,27 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that sheets inside cross origin iframes, served from a service worker
+// are correctly fetched via the service worker in the stylesheet editor.
+
+add_task(async function () {
+  const TEST_URL =
+    "https://test1.example.com/browser/devtools/client/styleeditor/test/bug_1405342_serviceworker_iframes.html";
+  const { ui } = await openStyleEditorForURL(TEST_URL);
+
+  if (ui.editors.length != 1) {
+    info("Stylesheet isn't available immediately, waiting for it");
+    await ui.once("editor-added");
+  }
+  is(ui.editors.length, 1, "Got the iframe stylesheet");
+
+  await ui.selectStyleSheet(ui.editors[0].styleSheet);
+  const editor = await ui.editors[0].getSourceEditor();
+  const text = editor.sourceEditor.getText();
+  is(
+    text,
+    "* { color: green; }",
+    "stylesheet content is the one served by the service worker"
+  );
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_bug_740541_iframes.js b/devtools/client/styleeditor/test/browser_styleeditor_bug_740541_iframes.js
new file mode 100644
index 0000000000..9eaf0be0f2
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_bug_740541_iframes.js
@@ -0,0 +1,107 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that sheets inside iframes are shown in the editor.
+
+add_task(async function () {
+  function makeStylesheet(selector) {
+    return (
+      "data:text/css;charset=UTF-8," + encodeURIComponent(selector + " { }")
+    );
+  }
+
+  function makeDocument(stylesheets, framedDocuments) {
+    stylesheets = stylesheets || [];
+    framedDocuments = framedDocuments || [];
+    return (
+      "data:text/html;charset=UTF-8," +
+      encodeURIComponent(
+        Array.prototype.concat
+          .call(
+            [
+              "<!DOCTYPE html>",
+              "<html>",
+              "<head>",
+              "<title>Bug 740541</title>",
+            ],
+            stylesheets.map(function (sheet) {
+              return (
+                '<link rel="stylesheet" type="text/css" href="' + sheet + '">'
+              );
+            }),
+            ["</head>", "<body>"],
+            framedDocuments.map(function (doc) {
+              return '<iframe src="' + doc + '"></iframe>';
+            }),
+            ["</body>", "</html>"]
+          )
+          .join("\n")
+      )
+    );
+  }
+
+  const DOCUMENT_WITH_INLINE_STYLE =
+    "data:text/html;charset=UTF-8," +
+    encodeURIComponent(
+      [
+        "<!DOCTYPE html>",
+        "<html>",
+        " <head>",
+        "  <title>Bug 740541</title>",
+        '  <style type="text/css">',
+        "    .something {",
+        "    }",
+        "  </style>",
+        " </head>",
+        " <body>",
+        " </body>",
+        " </html>",
+      ].join("\n")
+    );
+
+  const FOUR = TEST_BASE_HTTP + "four.html";
+
+  const SIMPLE = TEST_BASE_HTTP + "simple.css";
+
+  const SIMPLE_DOCUMENT = TEST_BASE_HTTP + "simple.html";
+
+  const TESTCASE_URI = makeDocument(
+    [makeStylesheet(".a")],
+    [
+      makeDocument([], [FOUR, DOCUMENT_WITH_INLINE_STYLE]),
+      makeDocument(
+        [makeStylesheet(".b"), SIMPLE],
+        [makeDocument([makeStylesheet(".c")], [])]
+      ),
+      makeDocument([SIMPLE], []),
+      SIMPLE_DOCUMENT,
+    ]
+  );
+
+  const EXPECTED_STYLE_SHEET_COUNT = 12;
+
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(
+    ui.editors.length,
+    EXPECTED_STYLE_SHEET_COUNT,
+    "Got the expected number of style sheets."
+  );
+
+  // Verify that stylesheets are removed when their related target is destroyed
+  if (isFissionEnabled() || isEveryFrameTargetEnabled()) {
+    info("Remove all iframes");
+    await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
+      const iframes = content.document.querySelectorAll("iframe");
+      for (const iframe of iframes) {
+        iframe.remove();
+      }
+    });
+
+    await waitFor(
+      () => ui.editors.length == 1,
+      "Wait until all iframe stylesheets are removed and we only have the top document one"
+    );
+  }
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_bug_851132_middle_click.js b/devtools/client/styleeditor/test/browser_styleeditor_bug_851132_middle_click.js
new file mode 100644
index 0000000000..ed0d5838b2
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_bug_851132_middle_click.js
@@ -0,0 +1,63 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that middle click on style sheet doesn't open index.xhtml in a new
+// tab (bug 851132).
+
+const TESTCASE_URI = TEST_BASE_HTTP + "four.html";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+  gBrowser.tabContainer.addEventListener("TabOpen", onTabAdded);
+
+  await ui.editors[0].getSourceEditor();
+  info("first editor selected");
+
+  await waitFor(
+    () => ui.editors[0].sourceEditor.hasFocus(),
+    "Wait until the initially selected editor grabs the focus"
+  );
+
+  info("Left-clicking on the second editor link.");
+  await clickOnStyleSheetLink(ui.editors[1], 0);
+
+  info("Waiting for the second editor to be selected.");
+  const editor = await ui.once("editor-selected");
+
+  ok(
+    editor.sourceEditor.hasFocus(),
+    "Left mouse click gave second editor focus."
+  );
+
+  // middle mouse click should not open a new tab
+  info("Middle clicking on the third editor link.");
+  await clickOnStyleSheetLink(ui.editors[2], 1);
+});
+
+/**
+ * A helper that clicks on style sheet link in the sidebar.
+ *
+ * @param {StyleSheetEditor} editor
+ *        The editor of which link should be clicked.
+ * @param {MouseEvent.button} button
+ *        The button to click the link with.
+ */
+async function clickOnStyleSheetLink(editor, button) {
+  const window = editor._window;
+  const link = editor.summary.querySelector(".stylesheet-name");
+
+  info("Waiting for focus.");
+  await SimpleTest.promiseFocus(window);
+
+  info("Pressing button " + button + " on style sheet name link.");
+  EventUtils.synthesizeMouseAtCenter(link, { button }, window);
+}
+
+function onTabAdded() {
+  ok(false, "middle mouse click has opened a new tab");
+}
+
+registerCleanupFunction(function () {
+  gBrowser.tabContainer.removeEventListener("TabOpen", onTabAdded);
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_bug_870339.js b/devtools/client/styleeditor/test/browser_styleeditor_bug_870339.js
new file mode 100644
index 0000000000..926048223d
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_bug_870339.js
@@ -0,0 +1,49 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+const SIMPLE = TEST_BASE_HTTP + "simple.css";
+const DOCUMENT_WITH_ONE_STYLESHEET =
+  "data:text/html;charset=UTF-8," +
+  encodeURIComponent(
+    [
+      "<!DOCTYPE html>",
+      "<html>",
+      " <head>",
+      "  <title>Bug 870339</title>",
+      '  <link rel="stylesheet" type="text/css" href="' + SIMPLE + '">',
+      " </head>",
+      " <body>",
+      " </body>",
+      "</html>",
+    ].join("\n")
+  );
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(DOCUMENT_WITH_ONE_STYLESHEET);
+
+  // Spam the "devtools.source-map.client-service.enabled" pref observer callback (#onOrigSourcesPrefChanged)
+  // multiple times before the StyleEditorActor has a chance to respond to the first one.
+  const SPAM_COUNT = 2;
+  let prefValue = false;
+  for (let i = 0; i < SPAM_COUNT; ++i) {
+    pushPref("devtools.source-map.client-service.enabled", prefValue);
+    prefValue = !prefValue;
+  }
+
+  // Wait for the StyleEditorActor to respond to each pref changes.
+  await new Promise(resolve => {
+    let loadCount = 0;
+    ui.on("stylesheets-refreshed", function onReset() {
+      ++loadCount;
+      if (loadCount == SPAM_COUNT) {
+        ui.off("stylesheets-refreshed", onReset);
+        // No matter how large SPAM_COUNT is, the number of style
+        // sheets should never be more than the number of style sheets
+        // in the document.
+        is(ui.editors.length, 1, "correct style sheet count");
+        resolve();
+      }
+    });
+  });
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_copyurl.js b/devtools/client/styleeditor/test/browser_styleeditor_copyurl.js
new file mode 100644
index 0000000000..8b2919a173
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_copyurl.js
@@ -0,0 +1,43 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test to check the 'Copy URL' functionality in the context menu item for stylesheets.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+
+add_task(async function () {
+  const { panel, ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  const doc = panel.panelWindow.document;
+  const contextMenu = getContextMenuElement(panel);
+  const copyUrlItem = doc.getElementById("context-copyurl");
+
+  const onContextMenuShown = new Promise(resolve => {
+    contextMenu.addEventListener("popupshown", resolve, { once: true });
+  });
+
+  info("Right-click the first stylesheet editor.");
+  const editor = ui.editors[0];
+
+  is(editor.friendlyName, "simple.css", "editor is the expected one");
+
+  const stylesheetEl = editor.summary.querySelector(".stylesheet-name");
+  await EventUtils.synthesizeMouseAtCenter(
+    stylesheetEl,
+    { button: 2, type: "contextmenu" },
+    panel.panelWindow
+  );
+  await onContextMenuShown;
+
+  ok(!copyUrlItem.hidden, "Copy URL menu item should be showing.");
+
+  info(
+    "Click on Copy URL menu item and wait for the URL to be copied to the clipboard."
+  );
+  await waitForClipboardPromise(
+    () => contextMenu.activateItem(copyUrlItem),
+    `${TEST_BASE_HTTPS}simple.css`
+  );
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_enabled.js b/devtools/client/styleeditor/test/browser_styleeditor_enabled.js
new file mode 100644
index 0000000000..40324b2ea6
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_enabled.js
@@ -0,0 +1,129 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that style sheets can be disabled and enabled.
+
+// https rather than chrome to improve coverage
+const SIMPLE_URI = TEST_BASE_HTTPS + "simple.html";
+const LONGNAME_URI = TEST_BASE_HTTPS + "longname.html";
+
+add_task(async function () {
+  const { panel, ui } = await openStyleEditorForURL(SIMPLE_URI);
+  const editor = await ui.editors[0].getSourceEditor();
+
+  const summary = editor.summary;
+  const stylesheetToggle = summary.querySelector(".stylesheet-toggle");
+  ok(stylesheetToggle, "stylesheet toggle button exists");
+
+  is(
+    editor.styleSheet.disabled,
+    false,
+    "first stylesheet is initially enabled"
+  );
+
+  is(
+    summary.classList.contains("disabled"),
+    false,
+    "first stylesheet is initially enabled, UI does not have DISABLED class"
+  );
+
+  info("Disabling the first stylesheet.");
+  await toggleEnabled(editor, stylesheetToggle, panel.panelWindow);
+
+  is(editor.styleSheet.disabled, true, "first stylesheet is now disabled");
+  is(
+    summary.classList.contains("disabled"),
+    true,
+    "first stylesheet is now disabled, UI has DISABLED class"
+  );
+
+  info("Enabling the first stylesheet again.");
+  await toggleEnabled(editor, stylesheetToggle, panel.panelWindow);
+
+  is(
+    editor.styleSheet.disabled,
+    false,
+    "first stylesheet is now enabled again"
+  );
+  is(
+    summary.classList.contains("disabled"),
+    false,
+    "first stylesheet is now enabled again, UI does not have DISABLED class"
+  );
+});
+
+// Check that stylesheets with long names do not prevent the toggle button
+// from being visible.
+add_task(async function testLongNameStylesheet() {
+  const { ui } = await openStyleEditorForURL(LONGNAME_URI);
+
+  is(ui.editors.length, 2, "Expected 2 stylesheet editors");
+
+  // Test that the first editor, which should have a stylesheet with a short
+  // name.
+  let editor = ui.editors[0];
+  let stylesheetToggle = editor.summary.querySelector(".stylesheet-toggle");
+  is(editor.friendlyName, "simple.css");
+  ok(stylesheetToggle, "stylesheet toggle button exists");
+  ok(stylesheetToggle.getBoundingClientRect().width > 0);
+  ok(stylesheetToggle.getBoundingClientRect().height > 0);
+
+  const expectedWidth = stylesheetToggle.getBoundingClientRect().width;
+  const expectedHeight = stylesheetToggle.getBoundingClientRect().height;
+
+  // Test that the second editor, which should have a stylesheet with a long
+  // name.
+  editor = ui.editors[1];
+  stylesheetToggle = editor.summary.querySelector(".stylesheet-toggle");
+  is(editor.friendlyName, "veryveryverylongnamethatcanbreakthestyleeditor.css");
+  ok(stylesheetToggle, "stylesheet toggle button exists");
+  is(stylesheetToggle.getBoundingClientRect().width, expectedWidth);
+  is(stylesheetToggle.getBoundingClientRect().height, expectedHeight);
+});
+
+add_task(async function testSystemStylesheet() {
+  const { ui } = await openStyleEditorForURL("about:support");
+
+  const aboutSupportEditor = ui.editors.find(
+    editor => editor.friendlyName === "aboutSupport.css"
+  );
+  ok(!!aboutSupportEditor, "Found the editor for aboutSupport.css");
+  const aboutSupportToggle =
+    aboutSupportEditor.summary.querySelector(".stylesheet-toggle");
+  ok(aboutSupportToggle, "enabled toggle button exists");
+  ok(!aboutSupportToggle.disabled, "enabled toggle button is not disabled");
+  is(
+    aboutSupportToggle.getAttribute("tooltiptext"),
+    "Toggle style sheet visibility"
+  );
+
+  const formsEditor = ui.editors.find(
+    editor => editor.friendlyName === "forms.css"
+  );
+  ok(!!formsEditor, "Found the editor for forms.css");
+  const formsToggle = formsEditor.summary.querySelector(".stylesheet-toggle");
+  ok(formsToggle, "enabled toggle button exists");
+  ok(formsToggle.disabled, "enabled toggle button is disabled");
+  is(
+    formsToggle.getAttribute("tooltiptext"),
+    "System style sheets can’t be disabled"
+  );
+});
+
+async function toggleEnabled(editor, stylesheetToggle, panelWindow) {
+  const changed = editor.once("property-change");
+
+  info("Waiting for focus.");
+  await SimpleTest.promiseFocus(panelWindow);
+
+  info("Clicking on the toggle.");
+  EventUtils.synthesizeMouseAtCenter(stylesheetToggle, {}, panelWindow);
+
+  info("Waiting for stylesheet to be disabled.");
+  let property = await changed;
+  while (property !== "disabled") {
+    info("Ignoring property-change for '" + property + "'.");
+    property = await editor.once("property-change");
+  }
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_fetch-from-netmonitor.js b/devtools/client/styleeditor/test/browser_styleeditor_fetch-from-netmonitor.js
new file mode 100644
index 0000000000..7169de8bf5
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_fetch-from-netmonitor.js
@@ -0,0 +1,80 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// A test to ensure Style Editor only issues 1 request for each stylesheet (instead of 2)
+// by using the cache on the platform.
+
+const EMPTY_TEST_URL = TEST_BASE_HTTPS + "doc_empty.html";
+const TEST_URL = TEST_BASE_HTTPS + "doc_fetch_from_netmonitor.html";
+
+add_task(async function () {
+  info("Opening netmonitor");
+  // Navigate first to an empty document in order to:
+  // * avoid introducing a cross process navigation when calling navigateTo()
+  // * properly wait for request updates when calling navigateTo, while showToolbox
+  //   won't necessarily wait for all pending requests. (If we were loading TEST_URL
+  //   in the tab, we might have pending updates in the netmonitor which won't be
+  //   awaited for by showToolbox)
+  const tab = await addTab(EMPTY_TEST_URL);
+  const toolbox = await gDevTools.showToolboxForTab(tab, {
+    toolId: "netmonitor",
+  });
+  const monitor = toolbox.getPanel("netmonitor");
+  const { store, windowRequire } = monitor.panelWin;
+  const Actions = windowRequire("devtools/client/netmonitor/src/actions/index");
+  const { getSortedRequests } = windowRequire(
+    "devtools/client/netmonitor/src/selectors/index"
+  );
+
+  store.dispatch(Actions.batchEnable(false));
+
+  info("Navigating to test page");
+  await navigateTo(TEST_URL);
+
+  info("Opening Style Editor");
+  const styleeditor = await toolbox.selectTool("styleeditor");
+  const ui = styleeditor.UI;
+
+  info("Waiting for the sources to be loaded.");
+  await ui.editors[0].getSourceEditor();
+  await ui.selectStyleSheet(ui.editors[1].styleSheet);
+  await ui.editors[1].getSourceEditor();
+
+  // Wait till there is 4 requests in Netmonitor store.
+  await waitUntil(() => getSortedRequests(store.getState()).length == 4);
+
+  info("Checking Netmonitor contents.");
+  const shortRequests = [];
+  const longRequests = [];
+  const hugeRequests = [];
+  for (const item of getSortedRequests(store.getState())) {
+    if (item.url.endsWith("doc_short_string.css")) {
+      shortRequests.push(item);
+    }
+    if (item.url.endsWith("doc_long_string.css")) {
+      longRequests.push(item);
+    }
+    if (item.url.endsWith("sjs_huge-css-server.sjs")) {
+      hugeRequests.push(item);
+    }
+  }
+
+  is(
+    shortRequests.length,
+    1,
+    "Got one request for doc_short_string.css after Style Editor was loaded."
+  );
+  is(
+    longRequests.length,
+    1,
+    "Got one request for doc_long_string.css after Style Editor was loaded."
+  );
+
+  is(
+    hugeRequests.length,
+    1,
+    "Got one requests for sjs_huge-css-server.sjs after Style Editor was loaded."
+  );
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_filesave.js b/devtools/client/styleeditor/test/browser_styleeditor_filesave.js
new file mode 100644
index 0000000000..e49d3cf8a9
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_filesave.js
@@ -0,0 +1,91 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that 'Save' function works.
+
+const TESTCASE_URI_HTML = TEST_BASE_HTTP + "simple.html";
+const TESTCASE_URI_CSS = TEST_BASE_HTTP + "simple.css";
+
+add_task(async function () {
+  const htmlFile = await copy(TESTCASE_URI_HTML, "simple.html");
+  await copy(TESTCASE_URI_CSS, "simple.css");
+  const uri = Services.io.newFileURI(htmlFile);
+  const filePath = uri.resolve("");
+
+  const { ui } = await openStyleEditorForURL(filePath);
+
+  const editor = ui.editors[0];
+  await editor.getSourceEditor();
+
+  info("Editing the style sheet.");
+  let dirty = editor.sourceEditor.once("dirty-change");
+  const beginCursor = { line: 0, ch: 0 };
+  editor.sourceEditor.replaceText("DIRTY TEXT", beginCursor, beginCursor);
+
+  await dirty;
+
+  is(editor.sourceEditor.isClean(), false, "Editor is dirty.");
+  ok(
+    editor.summary.classList.contains("unsaved"),
+    "Star icon is present in the corresponding summary."
+  );
+
+  info("Saving the changes.");
+  dirty = editor.sourceEditor.once("dirty-change");
+
+  editor.saveToFile(null, function (file) {
+    ok(file, "file should get saved directly when using a file:// URI");
+  });
+
+  await dirty;
+
+  is(editor.sourceEditor.isClean(), true, "Editor is clean.");
+  ok(
+    !editor.summary.classList.contains("unsaved"),
+    "Star icon is not present in the corresponding summary."
+  );
+});
+
+function copy(srcChromeURL, destFileName) {
+  return new Promise(resolve => {
+    const destFile = FileUtils.getFile("ProfD", [destFileName]);
+    write(read(srcChromeURL), destFile, resolve);
+  });
+}
+
+function read(srcChromeURL) {
+  const scriptableStream = Cc[
+    "@mozilla.org/scriptableinputstream;1"
+  ].getService(Ci.nsIScriptableInputStream);
+
+  const channel = NetUtil.newChannel({
+    uri: srcChromeURL,
+    loadUsingSystemPrincipal: true,
+  });
+  const input = channel.open();
+  scriptableStream.init(input);
+
+  let data = "";
+  while (input.available()) {
+    data = data.concat(scriptableStream.read(input.available()));
+  }
+  scriptableStream.close();
+  input.close();
+
+  return data;
+}
+
+function write(data, file, callback) {
+  const istream = getInputStream(data);
+  const ostream = FileUtils.openSafeFileOutputStream(file);
+
+  NetUtil.asyncCopy(istream, ostream, function (status) {
+    if (!Components.isSuccessCode(status)) {
+      info("Couldn't write to " + file.path);
+      return;
+    }
+
+    callback(file);
+  });
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_filter.js b/devtools/client/styleeditor/test/browser_styleeditor_filter.js
new file mode 100644
index 0000000000..c8472b5f40
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_filter.js
@@ -0,0 +1,343 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+requestLongerTimeout(2);
+
+// Check that the stylesheets list can be filtered
+
+const INITIAL_INLINE_STYLE_SHEETS_COUNT = 100;
+
+const TEST_URI =
+  "data:text/html;charset=UTF-8," +
+  encodeURIComponent(
+    `
+      <!DOCTYPE html>
+      <html>
+        <head>
+          <title>Test filter</title>
+          <link rel="stylesheet" type="text/css" href="${TEST_BASE_HTTPS}simple.css">
+          ${Array.from({ length: INITIAL_INLINE_STYLE_SHEETS_COUNT })
+            .map((_, i) => `<style>/* inline ${i} */</style>`)
+            .join("\n")}
+          <link rel="stylesheet" type="text/css" href="${TEST_BASE_HTTPS}pretty.css">
+        </head>
+        <body>
+        </body>
+      </html>
+    `
+  );
+
+add_task(async function () {
+  const { panel, ui } = await openStyleEditorForURL(TEST_URI);
+  const { panelWindow } = panel;
+  is(
+    ui.editors.length,
+    INITIAL_INLINE_STYLE_SHEETS_COUNT + 2,
+    "correct number of editors"
+  );
+
+  const doc = panel.panelWindow.document;
+
+  const filterInput = doc.querySelector(".devtools-filterinput");
+  const filterInputClearButton = doc.querySelector(
+    ".devtools-searchinput-clear"
+  );
+  ok(filterInput, "There's a filter input");
+  ok(filterInputClearButton, "There's a clear button next to the filter input");
+  ok(
+    filterInputClearButton.hasAttribute("hidden"),
+    "The clear button is hidden by default"
+  );
+
+  const setFilterInputValue = value => {
+    // The keyboard shortcut focuses the input and select its content, so we should
+    // be able to type right-away.
+    synthesizeKeyShortcut("CmdOrCtrl+P");
+    EventUtils.sendString(value);
+  };
+
+  info(
+    "Check that the list can be filtered with the stylesheet name, regardless of the casing"
+  );
+  let onEditorSelected = ui.once("editor-selected");
+  setFilterInputValue("PREttY");
+  ok(
+    !filterInputClearButton.hasAttribute("hidden"),
+    "The clear button is visible when the input isn't empty"
+  );
+  Assert.deepEqual(
+    getVisibleStyleSheetsNames(doc),
+    ["pretty.css"],
+    "Only pretty.css is now displayed"
+  );
+
+  await onEditorSelected;
+  is(
+    ui.selectedEditor,
+    ui.editors.at(-1),
+    "When the selected stylesheet is filtered out, the first visible one gets selected"
+  );
+  is(
+    filterInput.ownerGlobal.document.activeElement,
+    filterInput,
+    "Even when a stylesheet was automatically opened, the filter input is still focused"
+  );
+  ok(!ui.selectedEditor.sourceEditor.hasFocus(), "Editor doesn't have focus.");
+
+  info(
+    "Clicking on the clear button should clear the input and unfilter the list"
+  );
+  EventUtils.synthesizeMouseAtCenter(
+    filterInputClearButton,
+    {},
+    panel.panelWindow
+  );
+  is(filterInput.value, "", "input was cleared");
+  ok(!isListFiltered(doc), "List isn't filtered anymore");
+  ok(
+    filterInputClearButton.hasAttribute("hidden"),
+    "The clear button is hidden after clicking on it"
+  );
+
+  info("Check that the list can be filtered with name-less stylesheets");
+  onEditorSelected = ui.once("editor-selected");
+  setFilterInputValue("#1");
+  Assert.deepEqual(
+    getVisibleStyleSheetsNames(doc),
+    [
+      "<inline style sheet #1>",
+      "<inline style sheet #10>",
+      "<inline style sheet #11>",
+      "<inline style sheet #12>",
+      "<inline style sheet #13>",
+      "<inline style sheet #14>",
+      "<inline style sheet #15>",
+      "<inline style sheet #16>",
+      "<inline style sheet #17>",
+      "<inline style sheet #18>",
+      "<inline style sheet #19>",
+      "<inline style sheet #100>",
+    ],
+    `List is showing inline stylesheets whose index start with "1"`
+  );
+  await onEditorSelected;
+  is(
+    ui.selectedEditor,
+    ui.editors[1],
+    "The first visible stylesheet got selected"
+  );
+
+  info("Check that keyboard navigation still works when the list is filtered");
+  // Move focus out of the input
+  EventUtils.synthesizeKey("VK_TAB", {}, panelWindow);
+  EventUtils.synthesizeKey("VK_DOWN", {}, panelWindow);
+
+  is(
+    panelWindow.document.activeElement.childNodes[0].value,
+    "<inline style sheet #1>",
+    "focus is on first inline stylesheet"
+  );
+
+  EventUtils.synthesizeKey("VK_DOWN", {}, panelWindow);
+  is(
+    panelWindow.document.activeElement.childNodes[0].value,
+    "<inline style sheet #10>",
+    "focus is on inline stylesheet #10"
+  );
+
+  EventUtils.synthesizeKey("VK_DOWN", {}, panelWindow);
+  is(
+    panelWindow.document.activeElement.childNodes[0].value,
+    "<inline style sheet #11>",
+    "focus is on inline stylesheet #11"
+  );
+
+  info(
+    "Check that when stylesheets are added in the page, they respect the filter state"
+  );
+  let onEditorAdded = ui.once("editor-added");
+  // Adding an inline stylesheet that will match the search
+  await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
+    const document = content.document;
+    const style = document.createElement("style");
+    style.appendChild(document.createTextNode(`/* inline 101 */`));
+    document.head.appendChild(style);
+  });
+  await onEditorAdded;
+  ok(
+    getVisibleStyleSheetsNames(doc).includes("<inline style sheet #101>"),
+    "New inline stylesheet is visible as it matches the search"
+  );
+
+  // Adding a stylesheet that won't match the search
+  onEditorAdded = ui.once("editor-added");
+  await SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [TEST_BASE_HTTPS],
+    baseUrl => {
+      const document = content.document;
+      const link = document.createElement("link");
+      link.setAttribute("rel", "stylesheet");
+      link.setAttribute("type", "text/css");
+      link.setAttribute("href", `${baseUrl}doc_short_string.css`);
+      document.head.appendChild(link);
+    }
+  );
+  await onEditorAdded;
+
+  ok(
+    !getVisibleStyleSheetsNames(doc).includes("doc_short_string.css"),
+    "doc_short_string.css is not visible as its name does not match the search"
+  );
+
+  info(
+    "Check that clicking on the Add New Stylesheet button clears the list and show the stylesheet"
+  );
+  onEditorAdded = ui.once("editor-added");
+  await createNewStyleSheet(ui, panel.panelWindow);
+  is(filterInput.value, "", "Filter input was cleared");
+
+  ok(!isListFiltered(doc), "List is not filtered anymore");
+  is(ui.selectedEditor, ui.editors.at(-1), "The new stylesheet got selected");
+
+  info(
+    "Check that when no stylesheet matches the search, a class is added to the nav"
+  );
+  setFilterInputValue("sync_with_csp");
+  ok(navHasAllFilteredClass(panel), `"splitview-all-filtered" was added`);
+  ok(
+    filterInput
+      .closest(".devtools-searchbox")
+      .classList.contains("devtools-searchbox-no-match"),
+    `The searchbox has the "devtools-searchbox-no-match" class`
+  );
+
+  info(
+    "Check that adding a stylesheet matching the search remove the splitview-all-filtered class"
+  );
+  onEditorAdded = ui.once("editor-added");
+  await SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [TEST_BASE_HTTPS],
+    baseUrl => {
+      const document = content.document;
+      const link = document.createElement("link");
+      link.setAttribute("rel", "stylesheet");
+      link.setAttribute("type", "text/css");
+      link.setAttribute("href", `${baseUrl}sync_with_csp.css`);
+      document.head.appendChild(link);
+    }
+  );
+  await onEditorAdded;
+  ok(!navHasAllFilteredClass(panel), `"splitview-all-filtered" was removed`);
+  ok(
+    !filterInput
+      .closest(".devtools-searchbox")
+      .classList.contains("devtools-searchbox-no-match"),
+    `The searchbox does not have the "devtools-searchbox-no-match" class anymore`
+  );
+
+  info(
+    "Check that reloading the page when the filter don't match anything won't select anything"
+  );
+  setFilterInputValue("XXXDONTMATCHANYTHING");
+  ok(navHasAllFilteredClass(panel), `"splitview-all-filtered" was added`);
+  await reloadPageAndWaitForStyleSheets(
+    ui,
+    INITIAL_INLINE_STYLE_SHEETS_COUNT + 2
+  );
+  ok(
+    navHasAllFilteredClass(panel),
+    `"splitview-all-filtered" is still applied`
+  );
+  is(getVisibleStyleSheets(doc).length, 0, "No stylesheets are displayed");
+  is(ui.selectedEditor, null, "No editor was selected");
+
+  info(
+    "Check that reloading the page when the filter was matching elements keep the same state"
+  );
+  onEditorSelected = ui.once("editor-selected");
+  setFilterInputValue("pretty");
+  await onEditorSelected;
+  Assert.deepEqual(
+    getVisibleStyleSheetsNames(doc),
+    ["pretty.css"],
+    "Only pretty.css is now displayed"
+  );
+
+  onEditorSelected = ui.once("editor-selected");
+  await reloadPageAndWaitForStyleSheets(
+    ui,
+    INITIAL_INLINE_STYLE_SHEETS_COUNT + 2
+  );
+  await onEditorSelected;
+  Assert.deepEqual(
+    getVisibleStyleSheetsNames(doc),
+    ["pretty.css"],
+    "pretty.css is still the only stylesheet displayed"
+  );
+  is(
+    ui.selectedEditor.friendlyName,
+    "pretty.css",
+    "pretty.css editor is active"
+  );
+
+  info("Check that clearing the input does show all the stylesheets");
+  EventUtils.synthesizeMouseAtCenter(
+    filterInputClearButton,
+    {},
+    panel.panelWindow
+  );
+  ok(!isListFiltered(doc), "List is not filtered anymore");
+  is(
+    ui.selectedEditor.friendlyName,
+    "pretty.css",
+    "pretty.css editor is still active"
+  );
+});
+
+/**
+ * @param {StyleEditorPanel} panel
+ * @returns Boolean
+ */
+function navHasAllFilteredClass(panel) {
+  return panel.panelWindow.document
+    .querySelector(".splitview-nav")
+    .classList.contains("splitview-all-filtered");
+}
+
+/**
+ * Returns true if there's at least one stylesheet filtered out
+ *
+ * @param {Document} doc: StyleEditor document
+ * @returns Boolean
+ */
+function isListFiltered(doc) {
+  return !!doc.querySelectorAll("ol > li.splitview-filtered").length;
+}
+
+/**
+ * Returns the list of stylesheet list elements.
+ *
+ * @param {Document} doc: StyleEditor document
+ * @returns Array<Element>
+ */
+function getVisibleStyleSheets(doc) {
+  return Array.from(
+    doc.querySelectorAll(
+      "ol > li:not(.splitview-filtered) .stylesheet-name label"
+    )
+  );
+}
+
+/**
+ * Returns the list of stylesheet names visible in the style editor list.
+ *
+ * @param {Document} doc: StyleEditor document
+ * @returns Array<String>
+ */
+function getVisibleStyleSheetsNames(doc) {
+  return getVisibleStyleSheets(doc).map(label => label.value);
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_fission_switch_target.js b/devtools/client/styleeditor/test/browser_styleeditor_fission_switch_target.js
new file mode 100644
index 0000000000..9150e88729
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_fission_switch_target.js
@@ -0,0 +1,33 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test switching for the top-level target.
+
+const PARENT_PROCESS_URI = "about:robots";
+const CONTENT_PROCESS_URI = TEST_BASE_HTTPS + "simple.html";
+
+add_task(async function () {
+  // We use about:robots, because this page will run in the parent process.
+  // Navigating from about:robots to a regular content page will always trigger a target
+  // switch, with or without fission.
+
+  info("Open a page that runs in the parent process");
+  const { ui } = await openStyleEditorForURL(PARENT_PROCESS_URI);
+  await waitUntil(() => ui.editors.length === 6);
+  ok(true, `Six style sheets for ${PARENT_PROCESS_URI}`);
+
+  info("Navigate to a page that runs in the child process");
+  await navigateToAndWaitForStyleSheets(CONTENT_PROCESS_URI, ui, 2);
+  // We also have to wait for the toolbox to complete the target switching
+  // in order to avoid pending requests during test teardown.
+  ok(
+    ui.editors.every(
+      editor => editor._resource.nodeHref == CONTENT_PROCESS_URI
+    ),
+    `Two sheets present for ${CONTENT_PROCESS_URI}`
+  );
+
+  info("Wait until the editor is ready");
+  await waitFor(() => ui.selectedEditor?.sourceEditor);
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_highlight-selector.js b/devtools/client/styleeditor/test/browser_styleeditor_highlight-selector.js
new file mode 100644
index 0000000000..8936d86ce6
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_highlight-selector.js
@@ -0,0 +1,199 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that hovering over a simple selector in the style-editor requests the
+// highlighting of the corresponding nodes, even in remote iframes.
+
+const REMOTE_IFRAME_URL = `https://example.org/document-builder.sjs?html=
+    <style>h2{color:cyan}</style>
+    <h2>highlighter test</h2>`;
+const TOP_LEVEL_URL = `https://example.com/document-builder.sjs?html=
+    <style>h1{color:red}</style>
+    <h1>highlighter test</h1>
+    <iframe src='${REMOTE_IFRAME_URL}'></iframe>`;
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TOP_LEVEL_URL);
+
+  info(
+    "Wait until both stylesheet are loaded and ready to handle mouse events"
+  );
+  await waitFor(() => ui.editors.length == 2);
+  const topLevelStylesheetEditor = ui.editors.find(e =>
+    e._resource.nodeHref.startsWith("https://example.com")
+  );
+  const iframeStylesheetEditor = ui.editors.find(e =>
+    e._resource.nodeHref.startsWith("https://example.org")
+  );
+
+  await ui.selectStyleSheet(topLevelStylesheetEditor.styleSheet);
+  await waitFor(() => topLevelStylesheetEditor.highlighter);
+
+  info("Check that highlighting works on the top-level document");
+  const topLevelHighlighterTestFront =
+    await topLevelStylesheetEditor._resource.targetFront.getFront(
+      "highlighterTest"
+    );
+  topLevelHighlighterTestFront.highlighter =
+    topLevelStylesheetEditor.highlighter;
+
+  info("Expecting a node-highlighted event");
+  let onHighlighted = topLevelStylesheetEditor.once("node-highlighted");
+
+  info("Simulate a mousemove event on the h1 selector");
+  // mousemove event listeners is set on editor.sourceEditor, which is not defined right away.
+  await waitFor(() => !!topLevelStylesheetEditor.sourceEditor);
+  let selectorEl = querySelectorCodeMirrorCssRuleSelectorToken(
+    topLevelStylesheetEditor
+  );
+  EventUtils.synthesizeMouseAtCenter(
+    selectorEl,
+    { type: "mousemove" },
+    selectorEl.ownerDocument.defaultView
+  );
+  await onHighlighted;
+
+  ok(
+    await topLevelHighlighterTestFront.isNodeRectHighlighted(
+      await getElementNodeRectWithinTarget(["h1"])
+    ),
+    "The highlighter's outline corresponds to the h1 node"
+  );
+
+  info(
+    "Simulate a mousemove event on the property name to hide the highlighter"
+  );
+  EventUtils.synthesizeMouseAtCenter(
+    querySelectorCodeMirrorCssPropertyNameToken(topLevelStylesheetEditor),
+    { type: "mousemove" },
+    selectorEl.ownerDocument.defaultView
+  );
+
+  await waitFor(async () => !topLevelStylesheetEditor.highlighter.isShown());
+  let isVisible = await topLevelHighlighterTestFront.isHighlighting();
+  is(isVisible, false, "The highlighter is now hidden");
+
+  info("Check that highlighting works on the iframe document");
+  await ui.selectStyleSheet(iframeStylesheetEditor.styleSheet);
+  await waitFor(() => iframeStylesheetEditor.highlighter);
+
+  const iframeHighlighterTestFront =
+    await iframeStylesheetEditor._resource.targetFront.getFront(
+      "highlighterTest"
+    );
+  iframeHighlighterTestFront.highlighter = iframeStylesheetEditor.highlighter;
+
+  info("Expecting a node-highlighted event");
+  onHighlighted = iframeStylesheetEditor.once("node-highlighted");
+
+  info("Simulate a mousemove event on the h2 selector");
+  // mousemove event listeners is set on editor.sourceEditor, which is not defined right away.
+  await waitFor(() => !!iframeStylesheetEditor.sourceEditor);
+  selectorEl = querySelectorCodeMirrorCssRuleSelectorToken(
+    iframeStylesheetEditor
+  );
+  EventUtils.synthesizeMouseAtCenter(
+    selectorEl,
+    { type: "mousemove" },
+    selectorEl.ownerDocument.defaultView
+  );
+  await onHighlighted;
+
+  isVisible = await iframeHighlighterTestFront.isHighlighting();
+  ok(isVisible, "The highlighter is shown");
+  ok(
+    await iframeHighlighterTestFront.isNodeRectHighlighted(
+      await getElementNodeRectWithinTarget(["iframe", "h2"])
+    ),
+    "The highlighter's outline corresponds to the h2 node"
+  );
+
+  info("Simulate a mousemove event elsewhere in the editor");
+  EventUtils.synthesizeMouseAtCenter(
+    querySelectorCodeMirrorCssPropertyNameToken(iframeStylesheetEditor),
+    { type: "mousemove" },
+    selectorEl.ownerDocument.defaultView
+  );
+
+  await waitFor(async () => !topLevelStylesheetEditor.highlighter.isShown());
+
+  isVisible = await iframeHighlighterTestFront.isHighlighting();
+  is(isVisible, false, "The highlighter is now hidden");
+});
+
+function querySelectorCodeMirrorCssRuleSelectorToken(stylesheetEditor) {
+  // CSS Rules selector (e.g. `h1`) are displayed in a .cm-tag span
+  return querySelectorCodeMirror(stylesheetEditor, ".cm-tag");
+}
+
+function querySelectorCodeMirrorCssPropertyNameToken(stylesheetEditor) {
+  // properties name (e.g. `color`) are displayed in a .cm-property span
+  return querySelectorCodeMirror(stylesheetEditor, ".cm-property");
+}
+
+function querySelectorCodeMirror(stylesheetEditor, selector) {
+  return stylesheetEditor.sourceEditor.codeMirror
+    .getWrapperElement()
+    .querySelector(selector);
+}
+
+/**
+ * Return the bounds of the element matching the selector, relatively to the target bounds
+ * (e.g. if Fission is enabled, it's related to the iframe bound, if Fission is disabled,
+ * it's related to the top level document).
+ *
+ * @param {Array<string>} selectors: Arrays of CSS selectors from the root document to the node.
+ *        The last CSS selector of the array is for the node in its frame doc.
+ *        The before-last CSS selector is for the frame in its parent frame, etc...
+ *        Ex: ["frame.first-frame", ..., "frame.last-frame", ".target-node"]
+ * @returns {Object} with left/top/width/height properties representing the node bounds
+ */
+async function getElementNodeRectWithinTarget(selectors) {
+  // Retrieve the browsing context in which the element is
+  const inBCSelector = selectors.pop();
+  const frameSelectors = selectors;
+  const bc = frameSelectors.length
+    ? await getBrowsingContextInFrames(
+        gBrowser.selectedBrowser.browsingContext,
+        frameSelectors
+      )
+    : gBrowser.selectedBrowser.browsingContext;
+
+  // Get the element bounds within the Firefox window
+  const elementBounds = await SpecialPowers.spawn(
+    bc,
+    [inBCSelector],
+    _selector => {
+      const el = content.document.querySelector(_selector);
+      const { left, top, width, height } = el
+        .getBoxQuadsFromWindowOrigin()[0]
+        .getBounds();
+      return { left, top, width, height };
+    }
+  );
+
+  // Then we need to offset the element bounds from a frame bounds
+  // When fission/EFT is enabled, the highlighter is only shown within the iframe bounds.
+  // So we only need to retrieve the element bounds within the iframe.
+  // Otherwise, we retrieve the top frame bounds
+  const relativeBrowsingContext =
+    isFissionEnabled() || isEveryFrameTargetEnabled()
+      ? bc
+      : gBrowser.selectedBrowser.browsingContext;
+  const relativeDocumentBounds = await SpecialPowers.spawn(
+    relativeBrowsingContext,
+    [],
+    () =>
+      content.document.documentElement
+        .getBoxQuadsFromWindowOrigin()[0]
+        .getBounds()
+  );
+
+  // Adjust the element bounds based on the relative document bounds
+  elementBounds.left = elementBounds.left - relativeDocumentBounds.left;
+  elementBounds.top = elementBounds.top - relativeDocumentBounds.top;
+
+  return elementBounds;
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_import.js b/devtools/client/styleeditor/test/browser_styleeditor_import.js
new file mode 100644
index 0000000000..456985f384
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_import.js
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that the import button in the UI works.
+
+// http rather than chrome to improve coverage
+const TESTCASE_URI = TEST_BASE_HTTP + "simple.html";
+
+const FILENAME = "styleeditor-import-test.css";
+const SOURCE = "body{background:red;}";
+
+add_task(async function () {
+  const { panel, ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  const added = ui.once("test:editor-updated");
+  importSheet(ui, panel.panelWindow);
+
+  info("Waiting for editor to be added for the imported sheet.");
+  const editor = await added;
+
+  is(
+    editor.savedFile.leafName,
+    FILENAME,
+    "imported stylesheet will be saved directly into the same file"
+  );
+  is(
+    editor.friendlyName,
+    FILENAME,
+    "imported stylesheet has the same name as the filename"
+  );
+});
+
+function importSheet(ui, panelWindow) {
+  // create file to import first
+  const file = FileUtils.getFile("ProfD", [FILENAME]);
+  const ostream = FileUtils.openSafeFileOutputStream(file);
+  const istream = getInputStream(SOURCE);
+
+  NetUtil.asyncCopy(istream, ostream, function () {
+    FileUtils.closeSafeFileOutputStream(ostream);
+
+    // click the import button now that the file to import is ready
+    ui._mockImportFile = file;
+
+    waitForFocus(function () {
+      const document = panelWindow.document;
+      const importButton = document.querySelector(".style-editor-importButton");
+      ok(importButton, "import button exists");
+
+      EventUtils.synthesizeMouseAtCenter(importButton, {}, panelWindow);
+    }, panelWindow);
+  });
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_import_rule.js b/devtools/client/styleeditor/test/browser_styleeditor_import_rule.js
new file mode 100644
index 0000000000..1aba71634c
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_import_rule.js
@@ -0,0 +1,32 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that style editor shows sheets loaded with @import rules.
+
+// http rather than chrome to improve coverage
+const TESTCASE_URI = TEST_BASE_HTTPS + "import.html";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 3, "there are 3 stylesheets after loading @imports");
+
+  is(
+    ui.editors[0].styleSheet.href,
+    TEST_BASE_HTTPS + "simple.css",
+    "stylesheet 1 is simple.css"
+  );
+
+  is(
+    ui.editors[1].styleSheet.href,
+    TEST_BASE_HTTPS + "import.css",
+    "stylesheet 2 is import.css"
+  );
+
+  is(
+    ui.editors[2].styleSheet.href,
+    TEST_BASE_HTTPS + "import2.css",
+    "stylesheet 3 is import2.css"
+  );
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_init.js b/devtools/client/styleeditor/test/browser_styleeditor_init.js
new file mode 100644
index 0000000000..2183495441
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_init.js
@@ -0,0 +1,52 @@
+"use strict";
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Checks that style editor contains correct stylesheets after initialization.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "simple.html";
+const EXPECTED_SHEETS = [
+  {
+    sheetIndex: 0,
+    name: /^simple.css$/,
+    rules: 1,
+    active: true,
+  },
+  {
+    sheetIndex: 1,
+    name: /^<.*>$/,
+    rules: 3,
+    active: false,
+  },
+];
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 2, "The UI contains two style sheets.");
+  checkSheet(ui.editors[0], EXPECTED_SHEETS[0]);
+  checkSheet(ui.editors[1], EXPECTED_SHEETS[1]);
+});
+
+function checkSheet(editor, expected) {
+  is(
+    editor.styleSheet.styleSheetIndex,
+    expected.sheetIndex,
+    "Style sheet has correct index."
+  );
+
+  const summary = editor.summary;
+  const name = summary
+    .querySelector(".stylesheet-name > label")
+    .getAttribute("value");
+  ok(expected.name.test(name), "The name '" + name + "' is correct.");
+
+  const ruleCount = summary.querySelector(".stylesheet-rule-count").textContent;
+  is(parseInt(ruleCount, 10), expected.rules, "the rule count is correct");
+
+  is(
+    summary.classList.contains("splitview-active"),
+    expected.active,
+    "The active status for this sheet is correct."
+  );
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_inline_friendly_names.js b/devtools/client/styleeditor/test/browser_styleeditor_inline_friendly_names.js
new file mode 100644
index 0000000000..35a23fe016
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_inline_friendly_names.js
@@ -0,0 +1,101 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that inline style sheets get correct names if they are saved to disk and
+// that those names survice a reload but not navigation to another page.
+
+const FIRST_TEST_PAGE = TEST_BASE_HTTPS + "inline-1.html";
+const SECOND_TEST_PAGE = TEST_BASE_HTTPS + "inline-2.html";
+const SAVE_PATH = "test.css";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(FIRST_TEST_PAGE);
+
+  testIndentifierGeneration(ui);
+
+  await saveFirstInlineStyleSheet(ui);
+  await testFriendlyNamesAfterSave(ui);
+  await reloadPageAndWaitForStyleSheets(ui, 2);
+  await testFriendlyNamesAfterSave(ui);
+  await navigateToAndWaitForStyleSheets(SECOND_TEST_PAGE, ui, 2);
+  await testFriendlyNamesAfterNavigation(ui);
+});
+
+function testIndentifierGeneration(ui) {
+  const fakeStyleSheetFile = {
+    href: "http://example.com/test.css",
+    nodeHref: "http://example.com/",
+    styleSheetIndex: 1,
+  };
+
+  const fakeInlineStyleSheet = {
+    href: null,
+    nodeHref: "http://example.com/",
+    styleSheetIndex: 2,
+  };
+
+  is(
+    ui.getStyleSheetIdentifier(fakeStyleSheetFile),
+    "http://example.com/test.css",
+    "URI is the identifier of style sheet file."
+  );
+
+  is(
+    ui.getStyleSheetIdentifier(fakeInlineStyleSheet),
+    "inline-2-at-http://example.com/",
+    "Inline sheets are identified by their page and position in the page."
+  );
+}
+
+function saveFirstInlineStyleSheet(ui) {
+  return new Promise(resolve => {
+    const editor = ui.editors[0];
+    const destFile = FileUtils.getFile("ProfD", [SAVE_PATH]);
+
+    editor.saveToFile(destFile, function (file) {
+      ok(file, "File was correctly saved.");
+      resolve();
+    });
+  });
+}
+
+function testFriendlyNamesAfterSave(ui) {
+  const firstEditor = ui.editors[0];
+  const secondEditor = ui.editors[1];
+
+  // The friendly name of first sheet should've been remembered, the second
+  // should not be the same (bug 969900).
+  is(
+    firstEditor.friendlyName,
+    SAVE_PATH,
+    "Friendly name is correct for the saved inline style sheet."
+  );
+  isnot(
+    secondEditor.friendlyName,
+    SAVE_PATH,
+    "Friendly name for the second inline sheet isn't the same as the first."
+  );
+
+  return Promise.resolve(null);
+}
+
+function testFriendlyNamesAfterNavigation(ui) {
+  const firstEditor = ui.editors[0];
+  const secondEditor = ui.editors[1];
+
+  // Inline style sheets shouldn't have the name of previously saved file as the
+  // page is different.
+  isnot(
+    firstEditor.friendlyName,
+    SAVE_PATH,
+    "The first editor doesn't have the save path as a friendly name."
+  );
+  isnot(
+    secondEditor.friendlyName,
+    SAVE_PATH,
+    "The second editor doesn't have the save path as a friendly name."
+  );
+
+  return Promise.resolve(null);
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_loading.js b/devtools/client/styleeditor/test/browser_styleeditor_loading.js
new file mode 100644
index 0000000000..40d70cf924
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_loading.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that style editor loads correctly.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "longload.html";
+
+add_task(async function () {
+  // launch Style Editor right when the tab is created (before load)
+  // this checks that the Style Editor still launches correctly when it is
+  // opened *while* the page is still loading. The Style Editor should not
+  // signal that it is loaded until the accompanying content page is loaded.
+  const tabAdded = addTab(TESTCASE_URI);
+  const tab = gBrowser.selectedTab;
+  const styleEditorLoaded = gDevTools.showToolboxForTab(tab, {
+    toolId: "styleeditor",
+  });
+
+  await Promise.all([tabAdded, styleEditorLoaded]);
+
+  const toolbox = await gDevTools.getToolboxForTab(tab);
+  const panel = toolbox.getPanel("styleeditor");
+  const { panelWindow } = panel;
+
+  ok(
+    !getRootElement(panel).classList.contains("loading"),
+    "style editor root element does not have 'loading' class name anymore"
+  );
+
+  let button = panelWindow.document.querySelector(".style-editor-newButton");
+  ok(!button.hasAttribute("disabled"), "new style sheet button is enabled");
+
+  button = panelWindow.document.querySelector(".style-editor-importButton");
+  ok(!button.hasAttribute("disabled"), "import button is enabled");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_loading_with_containers.js b/devtools/client/styleeditor/test/browser_styleeditor_loading_with_containers.js
new file mode 100644
index 0000000000..ecf788e412
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_loading_with_containers.js
@@ -0,0 +1,70 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that the stylesheets can be loaded correctly with containers
+// (bug 1282660).
+
+const TESTCASE_URI = TEST_BASE_HTTP + "simple.html";
+const EXPECTED_SHEETS = [
+  {
+    sheetIndex: 0,
+    name: /^simple.css$/,
+    rules: 1,
+    active: true,
+  },
+  {
+    sheetIndex: 1,
+    name: /^<.*>$/,
+    rules: 3,
+    active: false,
+  },
+];
+
+add_task(async function () {
+  // Using the personal container.
+  const userContextId = 1;
+  const { tab } = await openTabInUserContext(TESTCASE_URI, userContextId);
+  const { ui } = await openStyleEditor(tab);
+
+  is(ui.editors.length, 2, "The UI contains two style sheets.");
+  checkSheet(ui.editors[0], EXPECTED_SHEETS[0]);
+  checkSheet(ui.editors[1], EXPECTED_SHEETS[1]);
+});
+
+async function openTabInUserContext(uri, userContextId) {
+  // Open the tab in the correct userContextId.
+  const tab = BrowserTestUtils.addTab(gBrowser, uri, { userContextId });
+
+  // Select tab and make sure its browser is focused.
+  gBrowser.selectedTab = tab;
+  tab.ownerDocument.defaultView.focus();
+
+  const browser = gBrowser.getBrowserForTab(tab);
+  await BrowserTestUtils.browserLoaded(browser);
+  return { tab, browser };
+}
+
+function checkSheet(editor, expected) {
+  is(
+    editor.styleSheet.styleSheetIndex,
+    expected.sheetIndex,
+    "Style sheet has correct index."
+  );
+
+  const summary = editor.summary;
+  const name = summary
+    .querySelector(".stylesheet-name > label")
+    .getAttribute("value");
+  ok(expected.name.test(name), "The name '" + name + "' is correct.");
+
+  const ruleCount = summary.querySelector(".stylesheet-rule-count").textContent;
+  is(parseInt(ruleCount, 10), expected.rules, "the rule count is correct");
+
+  is(
+    summary.classList.contains("splitview-active"),
+    expected.active,
+    "The active status for this sheet is correct."
+  );
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_links.js b/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_links.js
new file mode 100644
index 0000000000..1fb9a13195
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_links.js
@@ -0,0 +1,158 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/* Tests responsive mode links for
+ * @media sidebar width and height related conditions */
+
+loader.lazyRequireGetter(
+  this,
+  "ResponsiveUIManager",
+  "resource://devtools/client/responsive/manager.js"
+);
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "media-rules.html";
+const responsiveModeToggleClass = ".media-responsive-mode-toggle";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  const editor = ui.editors[1];
+  await openEditor(editor);
+
+  const tab = gBrowser.selectedTab;
+  testNumberOfLinks(editor);
+  await testMediaLink(editor, tab, ui, 2, "width", 550);
+  await testMediaLink(editor, tab, ui, 3, "height", 300);
+
+  const onMediaChange = waitForManyEvents(ui, 1000);
+  await closeRDM(tab);
+
+  info("Wait for at-rules-list-changed events to settle on StyleEditorUI");
+  await onMediaChange;
+  doFinalChecks(editor);
+});
+
+function testNumberOfLinks(editor) {
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  const conditions = sidebar.querySelectorAll(".at-rule-condition");
+
+  info("Testing if media rules have the appropriate number of links");
+  ok(
+    !conditions[0].querySelector(responsiveModeToggleClass),
+    "There should be no links in the first media rule."
+  );
+  ok(
+    !conditions[1].querySelector(responsiveModeToggleClass),
+    "There should be no links in the second media rule."
+  );
+  ok(
+    conditions[2].querySelector(responsiveModeToggleClass),
+    "There should be 1 responsive mode link in the media rule"
+  );
+  is(
+    conditions[3].querySelectorAll(responsiveModeToggleClass).length,
+    2,
+    "There should be 2 responsive mode links in the media rule"
+  );
+}
+
+async function testMediaLink(editor, tab, ui, itemIndex, type, value) {
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  let conditions = sidebar.querySelectorAll(".at-rule-condition");
+
+  const onMediaChange = once(ui, "at-rules-list-changed");
+  const onRDMOpened = once(ui, "responsive-mode-opened");
+
+  info("Launching responsive mode");
+  conditions[itemIndex].querySelector(responsiveModeToggleClass).click();
+  await onRDMOpened;
+  const rdmUI = ResponsiveUIManager.getResponsiveUIForTab(tab);
+  await waitForResizeTo(rdmUI, type, value);
+  rdmUI.transitionsEnabled = false;
+
+  info("Wait for RDM ui to be fully loaded");
+  await waitForRDMLoaded(rdmUI);
+
+  info("Waiting for the @media list to update");
+  await onMediaChange;
+
+  // Ensure that the content has reflowed, which will ensure that all the
+  // element classes are reported correctly.
+  await promiseContentReflow(rdmUI);
+
+  ok(
+    ResponsiveUIManager.isActiveForTab(tab),
+    "Responsive mode should be active."
+  );
+  conditions = sidebar.querySelectorAll(".at-rule-condition");
+  ok(
+    !conditions[itemIndex].classList.contains("media-condition-unmatched"),
+    "media rule should now be matched after responsive mode is active"
+  );
+
+  const dimension = (await getSizing(rdmUI))[type];
+  is(dimension, value, `${type} should be properly set.`);
+}
+
+function doFinalChecks(editor) {
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  let conditions = sidebar.querySelectorAll(".at-rule-condition");
+  conditions = sidebar.querySelectorAll(".at-rule-condition");
+  ok(
+    conditions[2].classList.contains("media-condition-unmatched"),
+    "The width condition should now be unmatched"
+  );
+  ok(
+    conditions[3].classList.contains("media-condition-unmatched"),
+    "The height condition should now be unmatched"
+  );
+}
+
+/* Helpers */
+function waitForResizeTo(rdmUI, type, value) {
+  return new Promise(resolve => {
+    const onResize = data => {
+      if (data[type] != value) {
+        return;
+      }
+      rdmUI.off("content-resize", onResize);
+      info(`Got content-resize to a ${type} of ${value}`);
+      resolve();
+    };
+    info(`Waiting for content-resize to a ${type} of ${value}`);
+    rdmUI.on("content-resize", onResize);
+  });
+}
+
+function promiseContentReflow(ui) {
+  return SpecialPowers.spawn(ui.getViewportBrowser(), [], async function () {
+    return new Promise(resolve => {
+      content.window.requestAnimationFrame(() => {
+        content.window.requestAnimationFrame(resolve);
+      });
+    });
+  });
+}
+
+async function getSizing(rdmUI) {
+  const browser = rdmUI.getViewportBrowser();
+  const sizing = await SpecialPowers.spawn(browser, [], async function () {
+    return {
+      width: content.innerWidth,
+      height: content.innerHeight,
+    };
+  });
+  return sizing;
+}
+
+function openEditor(editor) {
+  getLinkFor(editor).click();
+
+  return editor.getSourceEditor();
+}
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_sourcemaps.js b/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_sourcemaps.js
new file mode 100644
index 0000000000..5086058402
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_media_sidebar_sourcemaps.js
@@ -0,0 +1,62 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// https rather than chrome to improve coverage
+const TESTCASE_URI = TEST_BASE_HTTPS + "media-rules-sourcemaps.html";
+const MAP_PREF = "devtools.source-map.client-service.enabled";
+
+const LABELS = [
+  "screen and (max-width: 320px)",
+  "screen and (min-width: 1200px)",
+];
+const LINE_NOS = [5, 8];
+
+waitForExplicitFinish();
+
+add_task(async function () {
+  Services.prefs.setBoolPref(MAP_PREF, true);
+
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 1, "correct number of editors");
+
+  // Test editor with @media rules
+  const mediaEditor = ui.editors[0];
+  await openEditor(mediaEditor);
+  testAtRulesEditor(mediaEditor);
+
+  Services.prefs.clearUserPref(MAP_PREF);
+});
+
+function testAtRulesEditor(editor) {
+  const sidebar = editor.details.querySelector(".stylesheet-sidebar");
+  is(sidebar.hidden, false, "sidebar is showing on editor with @media");
+
+  const entries = [...sidebar.querySelectorAll(".at-rule-label")];
+  is(entries.length, 2, "two @media rules displayed in sidebar");
+
+  testRule(entries[0], LABELS[0], LINE_NOS[0]);
+  testRule(entries[1], LABELS[1], LINE_NOS[1]);
+}
+
+function testRule(rule, text, lineno) {
+  const cond = rule.querySelector(".at-rule-condition");
+  is(cond.textContent, text, "media label is correct for " + text);
+
+  const line = rule.querySelector(".at-rule-line");
+  is(line.textContent, ":" + lineno, "correct line number shown");
+}
+
+/* Helpers */
+
+function openEditor(editor) {
+  getLinkFor(editor).click();
+
+  return editor.getSourceEditor();
+}
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_missing_stylesheet.js b/devtools/client/styleeditor/test/browser_styleeditor_missing_stylesheet.js
new file mode 100644
index 0000000000..97e6b78b49
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_missing_stylesheet.js
@@ -0,0 +1,37 @@
+"use strict";
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Checks that the style editor manages to finalize its stylesheet loading phase
+// even if one stylesheet is missing, and that an error message is displayed.
+
+const TESTCASE_URI = TEST_BASE + "missing.html";
+
+add_task(async function () {
+  const { ui, toolbox, panel } = await openStyleEditorForURL(TESTCASE_URI);
+
+  // Note that we're not testing for a specific number of stylesheet editors
+  // below because the test-page is loaded with chrome:// URL and, right now,
+  // that means UA stylesheets are shown. So we avoid hardcoding the number of
+  // stylesheets here.
+  await waitUntil(() => ui.editors.length);
+  ok(true, "The UI contains style sheets.");
+
+  const rootEl = panel.panelWindow.document.getElementById(
+    "style-editor-chrome"
+  );
+  ok(!rootEl.classList.contains("loading"), "The loading indicator is hidden");
+
+  const notifBox = toolbox.getNotificationBox();
+  await waitUntil(() => notifBox.getCurrentNotification());
+  const notif = notifBox.getCurrentNotification();
+  ok(notif, "The notification box contains a message");
+  ok(
+    notif.label.includes("Style sheet could not be loaded"),
+    "The error message is the correct one"
+  );
+  ok(
+    notif.label.includes("missing-stylesheet.css"),
+    "The error message contains the missing stylesheet's URL"
+  );
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_navigate.js b/devtools/client/styleeditor/test/browser_styleeditor_navigate.js
new file mode 100644
index 0000000000..68f76915e4
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_navigate.js
@@ -0,0 +1,31 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that selected sheet and cursor position is reset during navigation.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+const NEW_URI = TEST_BASE_HTTPS + "media.html";
+
+const LINE_NO = 5;
+const COL_NO = 3;
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 2, "Two sheets present after load.");
+
+  info("Selecting the second editor");
+  await ui.selectStyleSheet(ui.editors[1].styleSheet, LINE_NO, COL_NO);
+
+  await navigateToAndWaitForStyleSheets(NEW_URI, ui, 2);
+
+  info("Waiting for source editor to be ready.");
+  await ui.editors[0].getSourceEditor();
+
+  is(ui.selectedEditor, ui.editors[0], "first editor is selected");
+
+  const { line, ch } = ui.selectedEditor.sourceEditor.getCursor();
+  is(line, 0, "first line is selected");
+  is(ch, 0, "first column is selected");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_new.js b/devtools/client/styleeditor/test/browser_styleeditor_new.js
new file mode 100644
index 0000000000..27df58235c
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_new.js
@@ -0,0 +1,97 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that new sheets can be added and edited.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "simple.html";
+
+const TESTCASE_CSS_SOURCE = "body{background-color:red;";
+
+add_task(async function () {
+  const { panel, ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  const editor = await createNewStyleSheet(ui, panel.panelWindow);
+  await testInitialState(editor);
+
+  const originalHref = editor.styleSheet.href;
+  const waitForPropertyChange = onPropertyChange(editor);
+
+  await typeInEditor(editor, panel.panelWindow);
+
+  await waitForPropertyChange;
+
+  testUpdated(editor, originalHref);
+});
+
+function onPropertyChange(editor) {
+  return new Promise(resolve => {
+    editor.on("property-change", function onProp(property) {
+      // wait for text to be entered fully
+      const text = editor.sourceEditor.getText();
+      if (property == "ruleCount" && text == TESTCASE_CSS_SOURCE + "}") {
+        editor.off("property-change", onProp);
+        resolve();
+      }
+    });
+  });
+}
+
+async function testInitialState(editor) {
+  info("Testing the initial state of the new editor");
+
+  let summary = editor.summary;
+
+  ok(editor.sourceLoaded, "new editor is loaded when attached");
+  ok(editor.isNew, "new editor has isNew flag");
+
+  if (!editor.sourceEditor.hasFocus()) {
+    info("Waiting for stylesheet editor to gain focus");
+    await editor.sourceEditor.once("focus");
+  }
+  ok(editor.sourceEditor.hasFocus(), "new editor has focus");
+
+  summary = editor.summary;
+  const ruleCount = summary.querySelector(".stylesheet-rule-count").textContent;
+  is(parseInt(ruleCount, 10), 0, "new editor initially shows 0 rules");
+
+  const color = await getComputedStyleProperty({
+    selector: "body",
+    name: "background-color",
+  });
+  is(
+    color,
+    "rgb(255, 255, 255)",
+    "content's background color is initially white"
+  );
+}
+
+function typeInEditor(editor, panelWindow) {
+  return new Promise(resolve => {
+    waitForFocus(function () {
+      for (const c of TESTCASE_CSS_SOURCE) {
+        EventUtils.synthesizeKey(c, {}, panelWindow);
+      }
+      ok(editor.unsaved, "new editor has unsaved flag");
+
+      resolve();
+    }, panelWindow);
+  });
+}
+
+function testUpdated(editor, originalHref) {
+  info("Testing the state of the new editor after editing it");
+
+  is(
+    editor.sourceEditor.getText(),
+    TESTCASE_CSS_SOURCE + "}",
+    "rule bracket has been auto-closed"
+  );
+
+  const ruleCount = editor.summary.querySelector(
+    ".stylesheet-rule-count"
+  ).textContent;
+  is(parseInt(ruleCount, 10), 1, "new editor shows 1 rule after modification");
+
+  is(editor.styleSheet.href, originalHref, "style sheet href did not change");
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_nostyle.js b/devtools/client/styleeditor/test/browser_styleeditor_nostyle.js
new file mode 100644
index 0000000000..c8a2134135
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_nostyle.js
@@ -0,0 +1,56 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that 'no styles' indicator is shown if a page doesn't contain any style
+// sheets.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "nostyle.html";
+
+add_task(async function () {
+  // Make enough room for the "append style sheet" link to not wrap,
+  // as it messes up with EvenEventUtils.synthesizeMouse
+  await pushPref("devtools.styleeditor.navSidebarWidth", 500);
+  const { panel, ui } = await openStyleEditorForURL(TESTCASE_URI);
+  const { panelWindow } = panel;
+
+  ok(
+    !getRootElement(panel).classList.contains("loading"),
+    "style editor root element does not have 'loading' class name anymore"
+  );
+
+  const newButton = panelWindow.document.querySelector(
+    "toolbarbutton.style-editor-newButton"
+  );
+  ok(!newButton.hasAttribute("disabled"), "new style sheet button is enabled");
+
+  const importButton = panelWindow.document.querySelector(
+    ".style-editor-importButton"
+  );
+  ok(!importButton.hasAttribute("disabled"), "import button is enabled");
+
+  const emptyPlaceHolderEl =
+    getRootElement(panel).querySelector(".empty.placeholder");
+  isnot(
+    emptyPlaceHolderEl.ownerGlobal.getComputedStyle(emptyPlaceHolderEl).display,
+    "none",
+    "showing 'no style' indicator"
+  );
+
+  info(
+    "Check that clicking on the append new stylesheet link do add a stylesheet"
+  );
+  const onEditorAdded = ui.once("editor-added");
+  const newLink = emptyPlaceHolderEl.querySelector("a.style-editor-newButton");
+
+  // Use synthesizeMouse to also check that the element is visible
+  EventUtils.synthesizeMouseAtCenter(newLink, {}, newLink.ownerGlobal);
+  await onEditorAdded;
+
+  ok(true, "A stylesheet was added");
+  is(
+    emptyPlaceHolderEl.ownerGlobal.getComputedStyle(emptyPlaceHolderEl).display,
+    "none",
+    "The empty placeholder element is now hidden"
+  );
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_opentab.js b/devtools/client/styleeditor/test/browser_styleeditor_opentab.js
new file mode 100644
index 0000000000..55494f4166
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_opentab.js
@@ -0,0 +1,133 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// A test to check the 'Open Link in new tab' functionality in the
+// context menu item for stylesheets (bug 992947).
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+
+add_task(async function () {
+  const { panel, ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  const openLinkNewTabItem = panel.panelWindow.document.getElementById(
+    "context-openlinknewtab"
+  );
+
+  let menu = await rightClickStyleSheet(panel, ui.editors[0]);
+  is(
+    openLinkNewTabItem.getAttribute("disabled"),
+    "false",
+    "The menu item is not disabled"
+  );
+  ok(!openLinkNewTabItem.hidden, "The menu item is not hidden");
+
+  const url = TEST_BASE_HTTPS + "simple.css";
+
+  const browserWindow = Services.wm.getMostRecentWindow(
+    gDevTools.chromeWindowType
+  );
+  const originalOpenWebLinkIn = browserWindow.openWebLinkIn;
+  const tabOpenedDefer = new Promise(resolve => {
+    browserWindow.openWebLinkIn = newUrl => {
+      // Reset the actual openWebLinkIn function before proceeding.
+      browserWindow.openWebLinkIn = originalOpenWebLinkIn;
+
+      is(newUrl, url, "The correct tab has been opened");
+      resolve();
+    };
+  });
+
+  const hidden = onPopupHide(menu);
+
+  menu.activateItem(openLinkNewTabItem);
+
+  info(`Waiting for a tab to open - ${url}`);
+  await tabOpenedDefer;
+
+  await hidden;
+
+  menu = await rightClickInlineStyleSheet(panel, ui.editors[1]);
+  is(
+    openLinkNewTabItem.getAttribute("disabled"),
+    "true",
+    "The menu item is disabled"
+  );
+  ok(!openLinkNewTabItem.hidden, "The menu item should not be hidden");
+  menu.hidePopup();
+
+  menu = await rightClickNoStyleSheet(panel);
+  ok(openLinkNewTabItem.hidden, "The menu item should be hidden");
+  menu.hidePopup();
+});
+
+function onPopupShow(contextMenu) {
+  return new Promise(resolve => {
+    contextMenu.addEventListener(
+      "popupshown",
+      function () {
+        resolve();
+      },
+      { once: true }
+    );
+  });
+}
+
+function onPopupHide(contextMenu) {
+  return new Promise(resolve => {
+    contextMenu.addEventListener(
+      "popuphidden",
+      function () {
+        resolve();
+      },
+      { once: true }
+    );
+  });
+}
+
+function rightClickStyleSheet(panel, editor) {
+  const contextMenu = getContextMenuElement(panel);
+  return new Promise(resolve => {
+    onPopupShow(contextMenu).then(() => {
+      resolve(contextMenu);
+    });
+
+    EventUtils.synthesizeMouseAtCenter(
+      editor.summary.querySelector(".stylesheet-name"),
+      { button: 2, type: "contextmenu" },
+      panel.panelWindow
+    );
+  });
+}
+
+function rightClickInlineStyleSheet(panel, editor) {
+  const contextMenu = getContextMenuElement(panel);
+  return new Promise(resolve => {
+    onPopupShow(contextMenu).then(() => {
+      resolve(contextMenu);
+    });
+
+    EventUtils.synthesizeMouseAtCenter(
+      editor.summary.querySelector(".stylesheet-name"),
+      { button: 2, type: "contextmenu" },
+      panel.panelWindow
+    );
+  });
+}
+
+function rightClickNoStyleSheet(panel) {
+  const contextMenu = getContextMenuElement(panel);
+  return new Promise(resolve => {
+    onPopupShow(contextMenu).then(() => {
+      resolve(contextMenu);
+    });
+
+    EventUtils.synthesizeMouseAtCenter(
+      panel.panelWindow.document.querySelector(
+        "#splitview-tpl-summary-stylesheet"
+      ),
+      { button: 2, type: "contextmenu" },
+      panel.panelWindow
+    );
+  });
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_pretty.js b/devtools/client/styleeditor/test/browser_styleeditor_pretty.js
new file mode 100644
index 0000000000..102daf9d97
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_pretty.js
@@ -0,0 +1,82 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that minified sheets are automatically prettified but other are left
+// untouched.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "minified.html";
+
+/*
+  body {
+    background:white;
+  }
+  div {
+    font-size:4em;
+    color:red
+  }
+  span {
+    color:green;
+  }
+*/
+const PRETTIFIED_SOURCE =
+  "" +
+  "body {\r?\n" +
+  "\tbackground:white;\r?\n" +
+  "}\r?\n" +
+  "div {\r?\n" +
+  "\tfont-size:4em;\r?\n" +
+  "\tcolor:red\r?\n" +
+  "}\r?\n" +
+  "span {\r?\n" +
+  "\tcolor:green;\r?\n" +
+  "}\r?\n";
+
+/*
+  body { background: red; }
+  div {
+    font-size: 5em;
+    color: red
+  }
+*/
+const ORIGINAL_SOURCE =
+  "" +
+  "body { background: red; }\r?\n" +
+  "div {\r?\n" +
+  "font-size: 5em;\r?\n" +
+  "color: red\r?\n" +
+  "}";
+
+const EXPAND_TAB = "devtools.editor.expandtab";
+
+add_task(async function () {
+  const oldExpandTabPref = SpecialPowers.getBoolPref(EXPAND_TAB);
+  // The 'EXPAND_TAB' preference has to be set to false because
+  // the constant 'PRETTIFIED_SOURCE' uses tabs for indentation.
+  SpecialPowers.setBoolPref(EXPAND_TAB, false);
+
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+  is(ui.editors.length, 2, "Two sheets present.");
+
+  info("Testing minified style sheet.");
+  let editor = await ui.editors[0].getSourceEditor();
+
+  const prettifiedSourceRE = new RegExp(PRETTIFIED_SOURCE);
+  ok(
+    prettifiedSourceRE.test(editor.sourceEditor.getText()),
+    "minified source has been prettified automatically"
+  );
+
+  info("Selecting second, non-minified style sheet.");
+  await ui.selectStyleSheet(ui.editors[1].styleSheet);
+
+  editor = ui.editors[1];
+
+  const originalSourceRE = new RegExp(ORIGINAL_SOURCE);
+  ok(
+    originalSourceRE.test(editor.sourceEditor.getText()),
+    "non-minified source has been left untouched"
+  );
+
+  SpecialPowers.setBoolPref(EXPAND_TAB, oldExpandTabPref);
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_private_perwindowpb.js b/devtools/client/styleeditor/test/browser_styleeditor_private_perwindowpb.js
new file mode 100644
index 0000000000..e372f54ba2
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_private_perwindowpb.js
@@ -0,0 +1,76 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+// This test makes sure that the style editor does not store any
+// content CSS files in the permanent cache when opened from a private window tab.
+
+const TEST_URL = `http://${TEST_HOST}/browser/devtools/client/styleeditor/test/test_private.html`;
+
+add_task(async function () {
+  info("Opening a new private window");
+  const win = await BrowserTestUtils.openNewBrowserWindow({ private: true });
+
+  info("Clearing the browser cache");
+  Services.cache2.clear();
+
+  const { toolbox, ui } = await openStyleEditorForURL(TEST_URL, win);
+
+  is(ui.editors.length, 1, "The style editor contains one sheet.");
+  const editor = ui.editors[0];
+  is(
+    editor.friendlyName,
+    "test_private.css",
+    "The style editor contains the expected stylesheet"
+  );
+
+  await editor.getSourceEditor();
+
+  await checkDiskCacheFor(editor.friendlyName);
+
+  await toolbox.destroy();
+
+  const onUnload = new Promise(done => {
+    win.addEventListener("unload", function listener(event) {
+      if (event.target == win.document) {
+        win.removeEventListener("unload", listener);
+        done();
+      }
+    });
+  });
+  win.close();
+  await onUnload;
+});
+
+function checkDiskCacheFor(fileName) {
+  let foundPrivateData = false;
+
+  return new Promise(resolve => {
+    Visitor.prototype = {
+      onCacheStorageInfo(num) {
+        info("disk storage contains " + num + " entries");
+      },
+      onCacheEntryInfo(uri) {
+        const urispec = uri.asciiSpec;
+        info(urispec);
+        foundPrivateData = foundPrivateData || urispec.includes(fileName);
+      },
+      onCacheEntryVisitCompleted() {
+        is(foundPrivateData, false, "web content present in disk cache");
+        resolve();
+      },
+    };
+    function Visitor() {}
+
+    const storage = Services.cache2.diskCacheStorage(
+      Services.loadContextInfo.default
+    );
+    storage.asyncVisitStorage(
+      new Visitor(),
+      /* Do walk entries */
+      true
+    );
+  });
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_reload.js b/devtools/client/styleeditor/test/browser_styleeditor_reload.js
new file mode 100644
index 0000000000..f568b3f40f
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_reload.js
@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that selected sheet and cursor position persists during reload.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+
+const LINE_NO = 5;
+const COL_NO = 3;
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 2, "Two sheets present after load.");
+
+  info("Selecting the second editor");
+  await ui.selectStyleSheet(ui.editors[1].styleSheet, LINE_NO, COL_NO);
+  const selectedStyleSheetIndex = ui.editors[1].styleSheet.styleSheetIndex;
+
+  await reloadPageAndWaitForStyleSheets(ui, 2);
+
+  info("Waiting for source editor to be ready.");
+  const newEditor = findEditor(ui, selectedStyleSheetIndex);
+  await newEditor.getSourceEditor();
+
+  is(
+    ui.selectedEditor,
+    newEditor,
+    "Editor of stylesheet that has styleSheetIndex we selected is selected after reload"
+  );
+
+  const { line, ch } = ui.selectedEditor.sourceEditor.getCursor();
+  is(line, LINE_NO, "correct line selected");
+  is(ch, COL_NO, "correct column selected");
+});
+
+function findEditor(ui, styleSheetIndex) {
+  return ui.editors.find(
+    editor => editor.styleSheet.styleSheetIndex === styleSheetIndex
+  );
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_resize_performance.js b/devtools/client/styleeditor/test/browser_styleeditor_resize_performance.js
new file mode 100644
index 0000000000..cd978fd624
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_resize_performance.js
@@ -0,0 +1,62 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * This is a performance test designed to check we are not redrawing the UI too many times
+ * after resizing the window, when the styleeditor displays mediaqueries which are source
+ * mapped.
+ * See Bug 1453044 for more details.
+ */
+
+const TESTCASE_URI = TEST_BASE_HTTP + "many-media-rules-sourcemaps/index.html";
+
+// Maximum delay allowed between two at-rules-list-changed events.
+const EVENTS_DELAY = 2000;
+
+// The window resize will still trigger several resize events which will lead to several
+// UI updates. Arbitrary maximum number of events allowed to be fired for a single resize.
+// This used to be > 100 events for this test case.
+const MAX_EVENTS = 10;
+
+add_task(async function () {
+  const { toolbox, ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  const win = toolbox.win.parent;
+  const originalWidth = win.outerWidth;
+  const originalHeight = win.outerHeight;
+
+  // Ensure the window is above 500px wide for @media (min-width: 500px)
+  if (originalWidth < 500) {
+    info("Window is too small for the test, resize it to > 800px width");
+    const onMediaListChanged = waitForManyEvents(ui, EVENTS_DELAY);
+    await resizeWindow(800, ui, win);
+    info("Wait for at-rules-list-changed events to settle");
+    await onMediaListChanged;
+  }
+
+  info(
+    "Resize the window to stop matching media queries, and trigger the UI updates"
+  );
+  const onMediaListChanged = waitForManyEvents(ui, win, EVENTS_DELAY);
+  await resizeWindow(400, ui, win);
+  const eventsCount = await onMediaListChanged;
+
+  ok(
+    eventsCount < MAX_EVENTS,
+    `Too many events fired (expected less than ${MAX_EVENTS}, got ${eventsCount})`
+  );
+
+  win.resizeTo(originalWidth, originalHeight);
+});
+
+/**
+ * Resize the window to the provided width.
+ */
+async function resizeWindow(width, ui, win) {
+  const onResize = once(win, "resize");
+  win.resizeTo(width, win.outerHeight);
+  info("Wait for window resize event");
+  await onResize;
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_scroll.js b/devtools/client/styleeditor/test/browser_styleeditor_scroll.js
new file mode 100644
index 0000000000..d9ae030068
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_scroll.js
@@ -0,0 +1,96 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that editor scrolls to correct line if it's selected with
+//  * selectStyleSheet (specified line)
+//  * click on the sidebar item (line before the editor was unselected)
+// See bug 1148086.
+
+const SIMPLE = TEST_BASE_HTTP + "simple.css";
+const LONG = TEST_BASE_HTTP + "doc_long.css";
+const DOCUMENT_WITH_LONG_SHEET =
+  "data:text/html;charset=UTF-8," +
+  encodeURIComponent(
+    [
+      "<!DOCTYPE html>",
+      "<html>",
+      " <head>",
+      "  <title>Editor scroll test page</title>",
+      '  <link rel="stylesheet" type="text/css" href="' + SIMPLE + '">',
+      '  <link rel="stylesheet" type="text/css" href="' + LONG + '">',
+      " </head>",
+      " <body>Editor scroll test page</body>",
+      "</html>",
+    ].join("\n")
+  );
+const LINE_TO_SELECT = 201;
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(DOCUMENT_WITH_LONG_SHEET);
+
+  is(ui.editors.length, 2, "Two editors present.");
+
+  const simpleEditor = ui.editors[0];
+  const longEditor = ui.editors[1];
+
+  info(`Selecting doc_long.css and scrolling to line ${LINE_TO_SELECT}`);
+
+  // We need to wait for editor-selected if we want to check the scroll
+  // position as scrolling occurs after selectStyleSheet resolves but before the
+  // event is emitted.
+  let selectEventPromise = waitForEditorToBeSelected(longEditor, ui);
+  await ui.selectStyleSheet(longEditor.styleSheet, LINE_TO_SELECT);
+  await selectEventPromise;
+
+  info("Checking that the correct line is visible after initial load");
+
+  const { from, to } = longEditor.sourceEditor.getViewport();
+  info(`Lines ${from}-${to} are visible (expected ${LINE_TO_SELECT}).`);
+
+  ok(from <= LINE_TO_SELECT, "The editor scrolled too much.");
+  ok(to >= LINE_TO_SELECT, "The editor scrolled too little.");
+
+  const initialScrollTop = longEditor.sourceEditor.getScrollInfo().top;
+  info(`Storing scrollTop = ${initialScrollTop} for later comparison.`);
+
+  info("Selecting the first editor (simple.css)");
+  await ui.selectStyleSheet(simpleEditor.styleSheet);
+
+  info("Selecting doc_long.css again.");
+  selectEventPromise = waitForEditorToBeSelected(longEditor, ui);
+
+  // Can't use ui.selectStyleSheet here as it will scroll the editor back to top
+  // and we want to check that the previous scroll position is restored.
+  const summary = await ui.getEditorSummary(longEditor);
+  summary.click();
+
+  info("Waiting for doc_long.css to be selected.");
+  await selectEventPromise;
+
+  const scrollTop = longEditor.sourceEditor.getScrollInfo().top;
+  is(
+    scrollTop,
+    initialScrollTop,
+    "Scroll top was restored after the sheet was selected again."
+  );
+});
+
+/**
+ * A helper that waits "editor-selected" event for given editor.
+ *
+ * @param {StyleSheetEditor} editor
+ *        The editor to wait for.
+ * @param {StyleEditorUI} ui
+ *        The StyleEditorUI the editor belongs to.
+ */
+var waitForEditorToBeSelected = async function (editor, ui) {
+  info(`Waiting for ${editor.friendlyName} to be selected.`);
+  let selected = await ui.once("editor-selected");
+  while (selected != editor) {
+    info(`Ignored editor-selected for editor ${editor.friendlyName}.`);
+    selected = await ui.once("editor-selected");
+  }
+
+  info(`Got editor-selected for ${editor.friendlyName}.`);
+};
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_selectstylesheet.js b/devtools/client/styleeditor/test/browser_styleeditor_selectstylesheet.js
new file mode 100644
index 0000000000..b455ec3c7f
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_selectstylesheet.js
@@ -0,0 +1,25 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that StyleEditorUI.selectStyleSheet selects the correct sheet, line and
+// column.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+
+const LINE_NO = 5;
+const COL_NO = 0;
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+  const editor = ui.editors[1];
+
+  info("Selecting style sheet #1.");
+  await ui.selectStyleSheet(editor.styleSheet, LINE_NO);
+
+  is(ui.selectedEditor, ui.editors[1], "Second editor is selected.");
+  const { line, ch } = ui.selectedEditor.sourceEditor.getCursor();
+
+  is(line, LINE_NO, "correct line selected");
+  is(ch, COL_NO, "correct column selected");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sidebars.js b/devtools/client/styleeditor/test/browser_styleeditor_sidebars.js
new file mode 100644
index 0000000000..d0cdb4acfe
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sidebars.js
@@ -0,0 +1,67 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "media-rules.html";
+
+const PREF_SHOW_AT_RULES_SIDEBAR = "devtools.styleeditor.showAtRulesSidebar";
+const PREF_SIDEBAR_WIDTH = "devtools.styleeditor.atRulesSidebarWidth";
+const PREF_NAV_WIDTH = "devtools.styleeditor.navSidebarWidth";
+
+// Initial widths for the navigation and media sidebars, which will be set via
+// the corresponding preferences.
+// The widths should remain between the current min-width and max-width for the
+// styleeditor sidebars (currently 100px and 400px).
+const NAV_WIDTH = 210;
+const MEDIA_WIDTH = 250;
+
+// Test that sidebar in the styleeditor can be resized.
+add_task(async function () {
+  await pushPref(PREF_SHOW_AT_RULES_SIDEBAR, true);
+  await pushPref(PREF_NAV_WIDTH, NAV_WIDTH);
+  await pushPref(PREF_SIDEBAR_WIDTH, MEDIA_WIDTH);
+
+  const { panel, ui } = await openStyleEditorForURL(TESTCASE_URI);
+  const doc = panel.panelWindow.document;
+
+  info("Open editor for inline sheet with @media rules to have both splitters");
+  const inlineMediaEditor = ui.editors[3];
+  inlineMediaEditor.summary.querySelector(".stylesheet-name").click();
+  await inlineMediaEditor.getSourceEditor();
+
+  info("Check the initial widths of side panels match the preferences values");
+  const navSidebar = doc.querySelector(".splitview-controller");
+  is(navSidebar.clientWidth, NAV_WIDTH);
+
+  const mediaSidebar = doc.querySelector(
+    ".splitview-active .stylesheet-sidebar"
+  );
+  is(mediaSidebar.clientWidth, MEDIA_WIDTH);
+
+  info(
+    "Resize the navigation splitter and check the navigation sidebar is updated"
+  );
+  const navSplitter = doc.querySelector(".devtools-side-splitter");
+  dragElement(navSplitter, { startX: 1, startY: 10, deltaX: 50, deltaY: 0 });
+  is(navSidebar.clientWidth, NAV_WIDTH + 50);
+
+  info("Resize the media splitter and check the media sidebar is updated");
+  const mediaSplitter = doc.querySelector(
+    ".splitview-active .devtools-side-splitter"
+  );
+  dragElement(mediaSplitter, { startX: 1, startY: 10, deltaX: -50, deltaY: 0 });
+  is(mediaSidebar.clientWidth, MEDIA_WIDTH + 50);
+});
+
+/* Helpers */
+
+function dragElement(el, { startX, startY, deltaX, deltaY }) {
+  const win = el.ownerGlobal;
+  const endX = startX + deltaX;
+  const endY = startY + deltaY;
+
+  EventUtils.synthesizeMouse(el, startX, startY, { type: "mousedown" }, win);
+  EventUtils.synthesizeMouse(el, endX, endY, { type: "mousemove" }, win);
+  EventUtils.synthesizeMouse(el, endX, endY, { type: "mouseup" }, win);
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_chrome.js b/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_chrome.js
new file mode 100644
index 0000000000..997171e30d
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_chrome.js
@@ -0,0 +1,47 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+const TEST_URI = URL_ROOT_SSL + "doc_sourcemap_chrome.html";
+const CHROME_TEST_URI = CHROME_URL_ROOT + "doc_sourcemap_chrome.html";
+const GENERATED_NAME = "sourcemaps_chrome.css";
+const ORIGINAL_NAME = "sourcemaps.scss";
+
+/**
+ * Test that a sourcemap served by a chrome URL for a http document will not be resolved.
+ */
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TEST_URI);
+  ok(
+    findStylesheetByName(ui, GENERATED_NAME),
+    "Sourcemap not resolved: generated source is listed"
+  );
+  ok(
+    !findStylesheetByName(ui, ORIGINAL_NAME),
+    "Sourcemap not resolved: original source is not listed"
+  );
+});
+
+/**
+ * Test that a sourcemap served by a chrome URL for a chrome document is resolved.
+ */
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(CHROME_TEST_URI);
+  ok(
+    findStylesheetByName(ui, ORIGINAL_NAME),
+    "Sourcemap resolved: original source is listed"
+  );
+  ok(
+    !findStylesheetByName(ui, GENERATED_NAME),
+    "Sourcemap resolved: generated source is not listed"
+  );
+});
+
+function findStylesheetByName(ui, name) {
+  return ui.editors.some(
+    editor =>
+      editor.summary
+        .querySelector(".stylesheet-name > label")
+        .getAttribute("value") === name
+  );
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_large.js b/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_large.js
new file mode 100644
index 0000000000..b03cef01c1
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_large.js
@@ -0,0 +1,34 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Covers the case from Bug 1128747, where loading a sourcemapped
+// file prevents the correct editor from being selected on load,
+// and causes a second iframe to be appended when the user clicks
+// editor in the list.
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "sourcemaps-large.html";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  await openEditor(ui.editors[0]);
+  const iframes = ui.selectedEditor.details.querySelectorAll("iframe");
+
+  is(iframes.length, 1, "There is only one editor iframe");
+  ok(
+    ui.selectedEditor.summary.classList.contains("splitview-active"),
+    "The editor is selected"
+  );
+});
+
+function openEditor(editor) {
+  getLinkFor(editor).click();
+
+  return editor.getSourceEditor();
+}
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_watching.js b/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_watching.js
new file mode 100644
index 0000000000..472e34b7fc
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sourcemap_watching.js
@@ -0,0 +1,155 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* eslint-disable mozilla/no-arbitrary-setTimeout */
+
+"use strict";
+
+const TESTCASE_URI_HTML = TEST_BASE_HTTP + "sourcemaps-watching.html";
+const TESTCASE_URI_CSS = TEST_BASE_HTTP + "sourcemap-css/sourcemaps.css";
+const TESTCASE_URI_REG_CSS = TEST_BASE_HTTP + "simple.css";
+const TESTCASE_URI_SCSS = TEST_BASE_HTTP + "sourcemap-sass/sourcemaps.scss";
+const TESTCASE_URI_MAP = TEST_BASE_HTTP + "sourcemap-css/sourcemaps.css.map";
+const TESTCASE_SCSS_NAME = "sourcemaps.scss";
+
+const TRANSITIONS_PREF = "devtools.styleeditor.transitions";
+
+const CSS_TEXT = "* { color: blue }";
+
+add_task(async function () {
+  await new Promise(resolve => {
+    SpecialPowers.pushPrefEnv({ set: [[TRANSITIONS_PREF, false]] }, resolve);
+  });
+
+  // copy all our files over so we don't screw them up for other tests
+  const HTMLFile = await copy(TESTCASE_URI_HTML, ["sourcemaps.html"]);
+  const CSSFile = await copy(TESTCASE_URI_CSS, [
+    "sourcemap-css",
+    "sourcemaps.css",
+  ]);
+  await copy(TESTCASE_URI_SCSS, ["sourcemap-sass", "sourcemaps.scss"]);
+  await copy(TESTCASE_URI_MAP, ["sourcemap-css", "sourcemaps.css.map"]);
+  await copy(TESTCASE_URI_REG_CSS, ["simple.css"]);
+
+  const uri = Services.io.newFileURI(HTMLFile);
+  const testcaseURI = uri.resolve("");
+
+  const { ui } = await openStyleEditorForURL(testcaseURI);
+
+  let editor = ui.editors[1];
+  if (getStylesheetNameFor(editor) != TESTCASE_SCSS_NAME) {
+    editor = ui.editors[2];
+  }
+
+  is(getStylesheetNameFor(editor), TESTCASE_SCSS_NAME, "found scss editor");
+
+  const link = getLinkFor(editor);
+  link.click();
+
+  await editor.getSourceEditor();
+
+  let color = await getComputedStyleProperty({
+    selector: "div",
+    name: "color",
+  });
+  is(color, "rgb(255, 0, 102)", "div is red before saving file");
+
+  const styleApplied = editor.once("style-applied");
+
+  await pauseForTimeChange();
+
+  // Edit and save Sass in the editor. This will start off a file-watching
+  // process waiting for the CSS file to change.
+  await editSCSS(editor);
+
+  // We can't run Sass or another compiler, so we fake it by just
+  // directly changing the CSS file.
+  await editCSSFile(CSSFile);
+
+  info("wrote to CSS file, waiting for style-applied event");
+
+  await styleApplied;
+
+  color = await getComputedStyleProperty({ selector: "div", name: "color" });
+  is(color, "rgb(0, 0, 255)", "div is blue after saving file");
+
+  // Ensure that the editor didn't revert.  Bug 1346662.
+  is(editor.sourceEditor.getText(), CSS_TEXT, "edits remain applied");
+});
+
+function editSCSS(editor) {
+  return new Promise(resolve => {
+    editor.sourceEditor.setText(CSS_TEXT);
+
+    editor.saveToFile(null, function (file) {
+      ok(file, "Scss file should be saved");
+      resolve();
+    });
+  });
+}
+
+function editCSSFile(CSSFile) {
+  return write(CSS_TEXT, CSSFile);
+}
+
+function pauseForTimeChange() {
+  return new Promise(resolve => {
+    // We have to wait for the system time to turn over > 1000 ms so that
+    // our file's last change time will show a change. This reflects what
+    // would happen in real life with a user manually saving the file.
+    setTimeout(resolve, 2000);
+  });
+}
+
+/* Helpers */
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}
+
+function getStylesheetNameFor(editor) {
+  return editor.summary
+    .querySelector(".stylesheet-name > label")
+    .getAttribute("value");
+}
+
+function copy(srcChromeURL, destFilePath) {
+  const destFile = FileUtils.getFile("ProfD", destFilePath);
+  return write(read(srcChromeURL), destFile);
+}
+
+function read(srcChromeURL) {
+  const scriptableStream = Cc[
+    "@mozilla.org/scriptableinputstream;1"
+  ].getService(Ci.nsIScriptableInputStream);
+
+  const channel = NetUtil.newChannel({
+    uri: srcChromeURL,
+    loadUsingSystemPrincipal: true,
+  });
+  const input = channel.open();
+  scriptableStream.init(input);
+
+  let data = "";
+  while (input.available()) {
+    data = data.concat(scriptableStream.read(input.available()));
+  }
+  scriptableStream.close();
+  input.close();
+
+  return data;
+}
+
+function write(data, file) {
+  return new Promise(resolve => {
+    const istream = getInputStream(data);
+    const ostream = FileUtils.openSafeFileOutputStream(file);
+
+    NetUtil.asyncCopy(istream, ostream, function (status) {
+      if (!Components.isSuccessCode(status)) {
+        info("Coudln't write to " + file.path);
+        return;
+      }
+      resolve(file);
+    });
+  });
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sourcemaps.js b/devtools/client/styleeditor/test/browser_styleeditor_sourcemaps.js
new file mode 100644
index 0000000000..452988eb68
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sourcemaps.js
@@ -0,0 +1,152 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// https rather than chrome to improve coverage
+const TESTCASE_URI = TEST_BASE_HTTPS + "sourcemaps.html";
+const PREF = "devtools.source-map.client-service.enabled";
+
+const contents = {
+  "sourcemaps.scss": [
+    "",
+    "$paulrougetpink: #f06;",
+    "",
+    "div {",
+    "  color: $paulrougetpink;",
+    "}",
+    "",
+    "span {",
+    "  background-color: #EEE;",
+    "}",
+  ].join("\n"),
+  "contained.scss": [
+    "$pink: #f06;",
+    "",
+    "#header {",
+    "  color: $pink;",
+    "}",
+  ].join("\n"),
+  "sourcemaps.css": [
+    "div {",
+    "  color: #ff0066; }",
+    "",
+    "span {",
+    "  background-color: #EEE; }",
+    "",
+    "/*# sourceMappingURL=sourcemaps.css.map */",
+  ].join("\n"),
+  "contained.css": [
+    "#header {",
+    "  color: #f06; }",
+    "",
+    "/*# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJma" +
+      "WxlIjoiIiwic291cmNlcyI6WyJzYXNzL2NvbnRhaW5lZC5zY3NzIl0sIm5hbWVzIjpbXSwi" +
+      "bWFwcGluZ3MiOiJBQUVBO0VBQ0UsT0FISyIsInNvdXJjZXNDb250ZW50IjpbIiRwaW5rOiA" +
+      "jZjA2O1xuXG4jaGVhZGVyIHtcbiAgY29sb3I6ICRwaW5rO1xufSJdfQ==*/",
+  ].join("\n"),
+  "test-stylus.styl": [
+    "paulrougetpink = #f06;",
+    "",
+    "div",
+    "  color: paulrougetpink",
+    "",
+    "span",
+    "  background-color: #EEE",
+    "",
+  ].join("\n"),
+  "test-stylus.css": [
+    "div {",
+    "  color: #f06;",
+    "}",
+    "span {",
+    "  background-color: #eee;",
+    "}",
+    "/*# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb" +
+      "3VyY2VzIjpbInRlc3Qtc3R5bHVzLnN0eWwiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IkFB" +
+      "RUE7RUFDRSxPQUFPLEtBQVA7O0FBRUY7RUFDRSxrQkFBa0IsS0FBbEIiLCJmaWxlIjoidGV" +
+      "zdC1zdHlsdXMuY3NzIiwic291cmNlc0NvbnRlbnQiOlsicGF1bHJvdWdldHBpbmsgPSAjZj" +
+      "A2O1xuXG5kaXZcbiAgY29sb3I6IHBhdWxyb3VnZXRwaW5rXG5cbnNwYW5cbiAgYmFja2dyb" +
+      "3VuZC1jb2xvcjogI0VFRVxuIl19 */",
+  ].join("\n"),
+};
+
+const cssNames = ["sourcemaps.css", "contained.css", "test-stylus.css"];
+const origNames = ["sourcemaps.scss", "contained.scss", "test-stylus.styl"];
+
+waitForExplicitFinish();
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(
+    ui.editors.length,
+    4,
+    "correct number of editors with source maps enabled"
+  );
+
+  // Test first plain css editor
+  testFirstEditor(ui.editors[0]);
+
+  // Test Scss editors
+  await testEditor(ui.editors[1], origNames);
+  await testEditor(ui.editors[2], origNames);
+  await testEditor(ui.editors[3], origNames);
+
+  // Test disabling original sources
+  await togglePref(ui);
+
+  is(ui.editors.length, 4, "correct number of editors after pref toggled");
+
+  // Test CSS editors
+  await testEditor(ui.editors[1], cssNames);
+  await testEditor(ui.editors[2], cssNames);
+  await testEditor(ui.editors[3], cssNames);
+
+  Services.prefs.clearUserPref(PREF);
+});
+
+function testFirstEditor(editor) {
+  const name = getStylesheetNameFor(editor);
+  is(name, "simple.css", "First style sheet display name is correct");
+}
+
+function testEditor(editor, possibleNames) {
+  const name = getStylesheetNameFor(editor);
+  ok(possibleNames.includes(name), name + " editor name is correct");
+
+  return openEditor(editor).then(() => {
+    const expectedText = contents[name];
+
+    const text = editor.sourceEditor.getText();
+
+    is(text, expectedText, name + " editor contains expected text");
+  });
+}
+
+/* Helpers */
+
+function togglePref(UI) {
+  const editorsPromise = UI.once("stylesheets-refreshed");
+  const selectedPromise = UI.once("editor-selected");
+
+  Services.prefs.setBoolPref(PREF, false);
+
+  return Promise.all([editorsPromise, selectedPromise]);
+}
+
+function openEditor(editor) {
+  getLinkFor(editor).click();
+
+  return editor.getSourceEditor();
+}
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}
+
+function getStylesheetNameFor(editor) {
+  return editor.summary
+    .querySelector(".stylesheet-name > label")
+    .getAttribute("value");
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sourcemaps_inline.js b/devtools/client/styleeditor/test/browser_styleeditor_sourcemaps_inline.js
new file mode 100644
index 0000000000..933a128a74
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sourcemaps_inline.js
@@ -0,0 +1,89 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// https rather than chrome to improve coverage
+const TESTCASE_URI = TEST_BASE_HTTPS + "sourcemaps-inline.html";
+const PREF = "devtools.source-map.client-service.enabled";
+
+const sassContent = `body {
+  background-color: black;
+  & > h1 {
+    color: white;
+  }
+}
+`;
+
+const cssContent =
+  `body {
+  background-color: black;
+}
+body > h1 {
+  color: white;
+}
+` +
+  "/*# sourceMappingURL=data:application/json;base64,ewoidmVyc2lvbiI6IDMsCiJtY" +
+  "XBwaW5ncyI6ICJBQUFBLElBQUs7RUFDSCxnQkFBZ0IsRUFBRSxLQUFLO0VBQ3ZCLFNBQU87SUFD" +
+  "TCxLQUFLLEVBQUUsS0FBSyIsCiJzb3VyY2VzIjogWyJ0ZXN0LnNjc3MiXSwKInNvdXJjZXNDb25" +
+  "0ZW50IjogWyJib2R5IHtcbiAgYmFja2dyb3VuZC1jb2xvcjogYmxhY2s7XG4gICYgPiBoMSB7XG" +
+  "4gICAgY29sb3I6IHdoaXRlO1xuICB9XG59XG4iXSwKIm5hbWVzIjogW10sCiJmaWxlIjogInRlc" +
+  "3QuY3NzIgp9Cg== */";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(
+    ui.editors.length,
+    1,
+    "correct number of editors with source maps enabled"
+  );
+
+  await testEditor(ui.editors[0], "test.scss", sassContent);
+
+  // Test disabling original sources
+  await togglePref(ui);
+
+  is(ui.editors.length, 1, "correct number of editors after pref toggled");
+
+  // Test CSS editors
+  await testEditor(ui.editors[0], "<inline style sheet #1>", cssContent);
+
+  Services.prefs.clearUserPref(PREF);
+});
+
+async function testEditor(editor, expectedName, expectedText) {
+  const name = getStylesheetNameFor(editor);
+  is(expectedName, name, name + " editor name is correct");
+
+  await openEditor(editor);
+  const text = editor.sourceEditor.getText();
+  is(text, expectedText, name + " editor contains expected text");
+}
+
+/* Helpers */
+
+function togglePref(UI) {
+  const editorsPromise = UI.once("stylesheets-refreshed");
+  const selectedPromise = UI.once("editor-selected");
+
+  Services.prefs.setBoolPref(PREF, false);
+
+  return Promise.all([editorsPromise, selectedPromise]);
+}
+
+function openEditor(editor) {
+  getLinkFor(editor).click();
+
+  return editor.getSourceEditor();
+}
+
+function getLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}
+
+function getStylesheetNameFor(editor) {
+  return editor.summary
+    .querySelector(".stylesheet-name > label")
+    .getAttribute("value");
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sv_keynav.js b/devtools/client/styleeditor/test/browser_styleeditor_sv_keynav.js
new file mode 100644
index 0000000000..5967eb40b5
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sv_keynav.js
@@ -0,0 +1,85 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that the style sheet list can be navigated with keyboard.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "four.html";
+
+add_task(async function () {
+  const { panel, ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  info("Waiting for source editor to load.");
+  await ui.editors[0].getSourceEditor();
+
+  const onEditorSelected = new Promise(resolve => {
+    const off = ui.on("editor-selected", editor => {
+      if (editor == ui.editors[2]) {
+        resolve();
+        off();
+      }
+    });
+  });
+
+  info("Testing keyboard navigation on the sheet list.");
+  testKeyboardNavigation(ui.editors[0], panel);
+
+  info("Waiting for editor #2 to be selected due to keyboard navigation.");
+  await onEditorSelected;
+  ok(ui.editors[2].sourceEditor.hasFocus(), "Editor #2 has focus.");
+});
+
+function getStylesheetNameLinkFor(editor) {
+  return editor.summary.querySelector(".stylesheet-name");
+}
+
+function testKeyboardNavigation(editor, panel) {
+  const panelWindow = panel.panelWindow;
+  const ui = panel.UI;
+  waitForFocus(function () {
+    const summary = editor.summary;
+    EventUtils.synthesizeMouseAtCenter(summary, {}, panelWindow);
+
+    let item = getStylesheetNameLinkFor(ui.editors[0]);
+    is(
+      panelWindow.document.activeElement,
+      item,
+      "editor 0 item is the active element"
+    );
+
+    EventUtils.synthesizeKey("VK_DOWN", {}, panelWindow);
+    item = getStylesheetNameLinkFor(ui.editors[1]);
+    is(
+      panelWindow.document.activeElement,
+      item,
+      "editor 1 item is the active element"
+    );
+
+    EventUtils.synthesizeKey("VK_HOME", {}, panelWindow);
+    item = getStylesheetNameLinkFor(ui.editors[0]);
+    is(
+      panelWindow.document.activeElement,
+      item,
+      "fist editor item is the active element"
+    );
+
+    EventUtils.synthesizeKey("VK_END", {}, panelWindow);
+    item = getStylesheetNameLinkFor(ui.editors[3]);
+    is(
+      panelWindow.document.activeElement,
+      item,
+      "last editor item is the active element"
+    );
+
+    EventUtils.synthesizeKey("VK_UP", {}, panelWindow);
+    item = getStylesheetNameLinkFor(ui.editors[2]);
+    is(
+      panelWindow.document.activeElement,
+      item,
+      "editor 2 item is the active element"
+    );
+
+    EventUtils.synthesizeKey("VK_RETURN", {}, panelWindow);
+    // this will attach and give focus editor 2
+  }, panelWindow);
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sv_resize.js b/devtools/client/styleeditor/test/browser_styleeditor_sv_resize.js
new file mode 100644
index 0000000000..76098145bc
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sv_resize.js
@@ -0,0 +1,53 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that resizing the source editor container doesn't move the caret.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "simple.html";
+
+const { Toolbox } = require("resource://devtools/client/framework/toolbox.js");
+
+add_task(async function () {
+  const { toolbox, ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 2, "There are 2 style sheets initially");
+
+  info("Changing toolbox host to a window.");
+  await toolbox.switchHost(Toolbox.HostType.WINDOW);
+
+  const editor = await ui.editors[0].getSourceEditor();
+  const originalSourceEditor = editor.sourceEditor;
+
+  const hostWindow = toolbox.win.parent;
+  const originalWidth = hostWindow.outerWidth;
+  const originalHeight = hostWindow.outerHeight;
+
+  // to check the caret is preserved
+  originalSourceEditor.setCursor(originalSourceEditor.getPosition(4));
+
+  info("Resizing window.");
+  hostWindow.resizeTo(120, 480);
+
+  const sourceEditor = ui.editors[0].sourceEditor;
+  is(
+    sourceEditor,
+    originalSourceEditor,
+    "the editor still references the same Editor instance"
+  );
+
+  is(
+    sourceEditor.getOffset(sourceEditor.getCursor()),
+    4,
+    "the caret position has been preserved"
+  );
+
+  info("Restoring window to original size.");
+  hostWindow.resizeTo(originalWidth, originalHeight);
+});
+
+registerCleanupFunction(() => {
+  // Restore the host type for other tests.
+  Services.prefs.clearUserPref("devtools.toolbox.host");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_sync.js b/devtools/client/styleeditor/test/browser_styleeditor_sync.js
new file mode 100644
index 0000000000..6b97e1cae0
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_sync.js
@@ -0,0 +1,73 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that changes in the style inspector are synchronized into the
+// style editor.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "sync.html";
+
+const expectedText = `
+  body {
+    border-width: 15px;
+    /*! color: red; */
+  }
+
+  #testid {
+    /*! font-size: 4em; */
+  }
+  `;
+
+async function closeAndReopenToolbox() {
+  await gDevTools.closeToolboxForTab(gBrowser.selectedTab);
+  const { ui: newui } = await openStyleEditor();
+  return newui;
+}
+
+add_task(async function () {
+  await addTab(TESTCASE_URI);
+  const { inspector, view } = await openRuleView();
+  await selectNode("#testid", inspector);
+  let ruleEditor = getRuleViewRuleEditor(view, 1);
+
+  // Disable the "font-size" property.
+  let propEditor = ruleEditor.rule.textProps[0].editor;
+  let onModification = view.once("ruleview-changed");
+  propEditor.enable.click();
+  await onModification;
+
+  // Disable the "color" property.  Note that this property is in a
+  // rule that also contains a non-inherited property -- so this test
+  // is also testing that property editing works properly in this
+  // situation.
+  ruleEditor = getRuleViewRuleEditor(view, 3);
+  propEditor = ruleEditor.rule.textProps[1].editor;
+  onModification = view.once("ruleview-changed");
+  propEditor.enable.click();
+  await onModification;
+
+  let { ui } = await openStyleEditor();
+
+  let editor = await ui.editors[0].getSourceEditor();
+  let text = editor.sourceEditor.getText();
+  is(text, expectedText, "style inspector changes are synced");
+
+  // Close and reopen the toolbox, to see that the edited text remains
+  // available.
+  ui = await closeAndReopenToolbox();
+  editor = await ui.editors[0].getSourceEditor();
+  text = editor.sourceEditor.getText();
+  is(text, expectedText, "changes remain after close and reopen");
+
+  // For the time being, the actor does not update the style's owning
+  // node's textContent.  See bug 1205380.
+  const textContent = await SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [],
+    async function () {
+      return content.document.querySelector("style").textContent;
+    }
+  );
+
+  isnot(textContent, expectedText, "changes not written back to style node");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_syncAddProperty.js b/devtools/client/styleeditor/test/browser_styleeditor_syncAddProperty.js
new file mode 100644
index 0000000000..51546eaba6
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_syncAddProperty.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that adding a new rule is synced to the style editor.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "sync.html";
+const TESTCASE_URI_WITH_CSP = TEST_BASE_HTTP + "sync_with_csp.html";
+
+const expectedText = `
+  body {
+    border-width: 15px;
+    color: red;
+  }
+
+  #testid {
+    font-size: 4em;
+    /*! background-color: yellow; */
+  }
+  `;
+
+add_task(async function () {
+  const URIs = [TESTCASE_URI, TESTCASE_URI_WITH_CSP];
+
+  for (const URI of URIs) {
+    await addTab(URI);
+    const { inspector, view } = await openRuleView();
+    await selectNode("#testid", inspector);
+
+    info("Focusing a new property name in the rule-view on " + URI);
+    const ruleEditor = getRuleViewRuleEditor(view, 1);
+    const editor = await focusEditableField(view, ruleEditor.closeBrace);
+    is(
+      inplaceEditor(ruleEditor.newPropSpan),
+      editor,
+      "The new property editor has focus"
+    );
+
+    const input = editor.input;
+    input.value = "/* background-color: yellow; */";
+
+    info("Pressing return to commit and focus the new value field");
+    const onModifications = view.once("ruleview-changed");
+    EventUtils.synthesizeKey("VK_RETURN", {}, view.styleWindow);
+    await onModifications;
+
+    const { ui } = await openStyleEditor();
+    const sourceEditor = await ui.editors[0].getSourceEditor();
+    const text = sourceEditor.sourceEditor.getText();
+    is(text, expectedText, "selector edits are synced");
+  }
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_syncAddRule.js b/devtools/client/styleeditor/test/browser_styleeditor_syncAddRule.js
new file mode 100644
index 0000000000..e46ae57ed3
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_syncAddRule.js
@@ -0,0 +1,30 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that adding a new rule is synced to the style editor.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "sync.html";
+
+const expectedText = `
+#testid {
+}`;
+
+add_task(async function () {
+  await addTab(TESTCASE_URI);
+  const { inspector, view } = await openRuleView();
+  await selectNode("#testid", inspector);
+
+  const onRuleViewChanged = once(view, "ruleview-changed");
+  view.addRuleButton.click();
+  await onRuleViewChanged;
+
+  const { ui } = await openStyleEditor();
+
+  info("Selecting the second editor");
+  await ui.selectStyleSheet(ui.editors[1].styleSheet);
+
+  const editor = ui.editors[1];
+  const text = editor.sourceEditor.getText();
+  is(text, expectedText, "selector edits are synced");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_syncAlreadyOpen.js b/devtools/client/styleeditor/test/browser_styleeditor_syncAlreadyOpen.js
new file mode 100644
index 0000000000..f91441e7ea
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_syncAlreadyOpen.js
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that changes in the style inspector are synchronized into the
+// style editor.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "sync.html";
+
+const expectedText = `
+  body {
+    border-width: 15px;
+    color: red;
+  }
+
+  #testid {
+    /*! font-size: 4em; */
+  }
+  `;
+
+add_task(async function () {
+  await addTab(TESTCASE_URI);
+
+  const { inspector, view, toolbox } = await openRuleView();
+
+  // In this test, make sure the style editor is open before making
+  // changes in the inspector.
+  const { ui } = await openStyleEditor();
+  const editor = await ui.editors[0].getSourceEditor();
+
+  const onEditorChange = new Promise(resolve => {
+    editor.sourceEditor.on("change", resolve);
+  });
+
+  await toolbox.getPanel("inspector");
+  await selectNode("#testid", inspector);
+  const ruleEditor = getRuleViewRuleEditor(view, 1);
+
+  // Disable the "font-size" property.
+  const propEditor = ruleEditor.rule.textProps[0].editor;
+  const onModification = view.once("ruleview-changed");
+  propEditor.enable.click();
+  await onModification;
+
+  await openStyleEditor();
+  await onEditorChange;
+
+  const text = editor.sourceEditor.getText();
+  is(text, expectedText, "style inspector changes are synced");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_syncEditSelector.js b/devtools/client/styleeditor/test/browser_styleeditor_syncEditSelector.js
new file mode 100644
index 0000000000..c82000aada
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_syncEditSelector.js
@@ -0,0 +1,38 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that changes in the style inspector are synchronized into the
+// style editor.
+
+const TESTCASE_URI = TEST_BASE_HTTP + "sync.html";
+
+const expectedText = `
+  body {
+    border-width: 15px;
+    color: red;
+  }
+
+  #testid, span {
+    font-size: 4em;
+  }
+  `;
+
+add_task(async function () {
+  await addTab(TESTCASE_URI);
+  const { inspector, view } = await openRuleView();
+  await selectNode("#testid", inspector);
+  const ruleEditor = getRuleViewRuleEditor(view, 1);
+
+  let editor = await focusEditableField(view, ruleEditor.selectorText);
+  editor.input.value = "#testid, span";
+  const onRuleViewChanged = once(view, "ruleview-changed");
+  EventUtils.synthesizeKey("KEY_Enter");
+  await onRuleViewChanged;
+
+  const { ui } = await openStyleEditor();
+
+  editor = await ui.editors[0].getSourceEditor();
+  const text = editor.sourceEditor.getText();
+  is(text, expectedText, "selector edits are synced");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_syncIntoRuleView.js b/devtools/client/styleeditor/test/browser_styleeditor_syncIntoRuleView.js
new file mode 100644
index 0000000000..210e9b2bce
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_syncIntoRuleView.js
@@ -0,0 +1,41 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that changes in the style editor are synchronized into the
+// style inspector.
+
+const TEST_URI = `
+  <style type='text/css'>
+  </style>
+  <div id='testid' class='testclass'>Styled Node</div>
+`;
+
+const TESTCASE_CSS_SOURCE = "#testid { color: chartreuse; }";
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+
+  info("Open the inspector and select the node we want to add style to");
+  const { inspector, view } = await openRuleView();
+  await selectNode("#testid", inspector);
+
+  info("Open the StyleEditor");
+  const { panel, ui } = await openStyleEditor();
+
+  const editor = await ui.editors[0].getSourceEditor();
+  const onRuleViewRefreshed = view.once("ruleview-refreshed");
+  await new Promise(res => waitForFocus(res, panel.panelWindow));
+
+  info("Type new rule in stylesheet");
+  editor.focus();
+  EventUtils.sendString(TESTCASE_CSS_SOURCE, panel.panelWindow);
+  ok(editor.unsaved, "new editor has unsaved flag");
+
+  info("Wait for ruleview to update");
+  await onRuleViewRefreshed;
+
+  info("Check that edits were synced to rule view");
+  const value = getRuleViewPropertyValue(view, "#testid", "color");
+  is(value, "chartreuse", "Got the expected color property");
+});
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_transition_rule.js b/devtools/client/styleeditor/test/browser_styleeditor_transition_rule.js
new file mode 100644
index 0000000000..7fd1c0bd1b
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_transition_rule.js
@@ -0,0 +1,51 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TESTCASE_URI = TEST_BASE_HTTPS + "simple.html";
+
+const NEW_RULE = "body { background-color: purple; }";
+
+add_task(async function () {
+  const { ui } = await openStyleEditorForURL(TESTCASE_URI);
+
+  is(ui.editors.length, 2, "correct number of editors");
+
+  const editor = ui.editors[0];
+  await openEditor(editor);
+
+  // Set text twice in a row
+  const styleChanges = listenForStyleChange(editor);
+
+  editor.sourceEditor.setText(NEW_RULE);
+  editor.sourceEditor.setText(NEW_RULE + " ");
+
+  await styleChanges;
+
+  const rules = await SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [0],
+    async function (index) {
+      const sheet = content.document.styleSheets[index];
+      return [...sheet.cssRules].map(rule => rule.cssText);
+    }
+  );
+
+  // Test that we removed the transition rule, but kept the rule we added
+  is(rules.length, 1, "only one rule in stylesheet");
+  is(rules[0], NEW_RULE, "stylesheet only contains rule we added");
+});
+
+/* Helpers */
+
+function openEditor(editor) {
+  const link = editor.summary.querySelector(".stylesheet-name");
+  link.click();
+
+  return editor.getSourceEditor();
+}
+
+function listenForStyleChange(editor) {
+  return editor.once("style-applied");
+}
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_xul.js b/devtools/client/styleeditor/test/browser_styleeditor_xul.js
new file mode 100644
index 0000000000..e5843b9e79
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_xul.js
@@ -0,0 +1,23 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that the style-editor initializes correctly for XUL windows.
+
+"use strict";
+
+waitForExplicitFinish();
+
+const TEST_URL = TEST_BASE + "doc_xulpage.xhtml";
+
+add_task(async function () {
+  const tab = await addTab(TEST_URL);
+  const toolbox = await gDevTools.showToolboxForTab(tab, {
+    toolId: "styleeditor",
+  });
+  const panel = toolbox.getCurrentPanel();
+
+  ok(
+    panel,
+    "The style-editor panel did initialize correctly for the XUL window"
+  );
+});
diff --git a/devtools/client/styleeditor/test/browser_toolbox_styleeditor.js b/devtools/client/styleeditor/test/browser_toolbox_styleeditor.js
new file mode 100644
index 0000000000..a099551db6
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_toolbox_styleeditor.js
@@ -0,0 +1,100 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Test that stylesheets from parent and content processes are displayed in the styleeditor.
+
+"use strict";
+
+requestLongerTimeout(4);
+
+const TEST_URI = `data:text/html,<!DOCTYPE html>
+  <head>
+    <meta charset=utf8>
+    <link rel="stylesheet" type="text/css" href="${TEST_BASE_HTTP}simple.css">
+  <head>
+  <body>Test browser toolbox</body>`;
+
+/* global gToolbox */
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/devtools/client/framework/browser-toolbox/test/helpers-browser-toolbox.js",
+  this
+);
+
+add_task(async function () {
+  await pushPref("devtools.browsertoolbox.scope", "everything");
+  await pushPref("devtools.styleeditor.transitions", false);
+  await addTab(TEST_URI);
+  const ToolboxTask = await initBrowserToolboxTask();
+
+  await ToolboxTask.importFunctions({
+    waitUntil,
+  });
+
+  await ToolboxTask.spawn(null, async () => {
+    await gToolbox.selectTool("styleeditor");
+    const panel = gToolbox.getCurrentPanel();
+
+    function getStyleEditorItems() {
+      return Array.from(
+        panel.panelWindow.document.querySelectorAll(".splitview-nav li")
+      );
+    }
+
+    info(`check if "parent process" stylesheets are displayed`);
+    const isUAStyleSheet = el =>
+      el.querySelector(".stylesheet-name label").value == "ua.css";
+    await waitUntil(() => getStyleEditorItems().find(isUAStyleSheet));
+    ok(true, "Found ua.css stylesheet");
+
+    info("check if content page stylesheets are displayed");
+    const isTabStyleSheet = el =>
+      el.querySelector(".stylesheet-name label").value == "simple.css";
+    await waitUntil(() => getStyleEditorItems().find(isTabStyleSheet));
+    ok(true, "Found simple.css tab stylesheet");
+
+    info("Select the stylesheet and update its content");
+    const contentStylesheetSummaryEl =
+      getStyleEditorItems().find(isTabStyleSheet);
+
+    let tabStyleSheetEditor;
+    if (panel.UI.selectedEditor.friendlyName === "simple.css") {
+      // simple.css might be selected by default, depending on the order in
+      // which the stylesheets have been loaded in the style editor.
+      tabStyleSheetEditor = panel.UI.selectedEditor;
+    } else {
+      // We might get events for the initial, default selected stylesheet, so wait until
+      // we get the one for the simple.css stylesheet.
+      const onTabStyleSheetEditorSelected = new Promise(resolve => {
+        const onEditorSelected = editor => {
+          if (editor.summary == contentStylesheetSummaryEl) {
+            resolve(editor);
+            panel.UI.off("editor-selected", onEditorSelected);
+          }
+        };
+        panel.UI.on("editor-selected", onEditorSelected);
+      });
+      panel.UI.setActiveSummary(contentStylesheetSummaryEl);
+      tabStyleSheetEditor = await onTabStyleSheetEditorSelected;
+    }
+    const onStyleApplied = tabStyleSheetEditor.once("style-applied");
+    tabStyleSheetEditor.sourceEditor.setText(
+      tabStyleSheetEditor.sourceEditor.getText() + "\n body {color: red;}"
+    );
+    await onStyleApplied;
+  });
+
+  info("Check that the edit done in the style editor were applied to the page");
+  const bodyColorStyle = await getComputedStyleProperty({
+    selector: "body",
+    name: "color",
+  });
+
+  is(
+    bodyColorStyle,
+    "rgb(255, 0, 0)",
+    "Changes made to simple.css were applied to the page"
+  );
+
+  await ToolboxTask.destroy();
+});
diff --git a/devtools/client/styleeditor/test/bug_1405342_serviceworker_iframes.html b/devtools/client/styleeditor/test/bug_1405342_serviceworker_iframes.html
new file mode 100644
index 0000000000..7bcbcf875c
--- /dev/null
+++ b/devtools/client/styleeditor/test/bug_1405342_serviceworker_iframes.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Bug 1405342</title>
+</head>
+<body>
+  <iframe src="https://test2.example.com/browser/devtools/client/styleeditor/test/iframe_with_service_worker.html"><iframe>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/doc_empty.html b/devtools/client/styleeditor/test/doc_empty.html
new file mode 100644
index 0000000000..825c61e6b9
--- /dev/null
+++ b/devtools/client/styleeditor/test/doc_empty.html
@@ -0,0 +1,3 @@
+<!doctype html>
+<html>
+</html>
diff --git a/devtools/client/styleeditor/test/doc_fetch_from_netmonitor.html b/devtools/client/styleeditor/test/doc_fetch_from_netmonitor.html
new file mode 100644
index 0000000000..ff943978a0
--- /dev/null
+++ b/devtools/client/styleeditor/test/doc_fetch_from_netmonitor.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html>
+<head>
+  <title>Fetch from netmonitor testcase</title>
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="doc_short_string.css"/>
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="doc_long_string.css"/>
+  <!-- This last CSS is generated by a SJS server to avoid adding a 300,000 lines stylesheet to the codebase. -->
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="sjs_huge-css-server.sjs"/>
+</head>
+<body>
+	<div>Fetch from netmonitor</div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/doc_long.css b/devtools/client/styleeditor/test/doc_long.css
new file mode 100644
index 0000000000..801a6e276f
--- /dev/null
+++ b/devtools/client/styleeditor/test/doc_long.css
@@ -0,0 +1,402 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+div {
+  z-index: 1;
+}
+
+div {
+  z-index: 2;
+}
+
+div {
+  z-index: 3;
+}
+
+div {
+  z-index: 4;
+}
+
+div {
+  z-index: 5;
+}
+
+div {
+  z-index: 6;
+}
+
+div {
+  z-index: 7;
+}
+
+div {
+  z-index: 8;
+}
+
+div {
+  z-index: 9;
+}
+
+div {
+  z-index: 10;
+}
+
+div {
+  z-index: 11;
+}
+
+div {
+  z-index: 12;
+}
+
+div {
+  z-index: 13;
+}
+
+div {
+  z-index: 14;
+}
+
+div {
+  z-index: 15;
+}
+
+div {
+  z-index: 16;
+}
+
+div {
+  z-index: 17;
+}
+
+div {
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diff --git a/devtools/client/styleeditor/test/doc_long_string.css b/devtools/client/styleeditor/test/doc_long_string.css
new file mode 100644
index 0000000000..39a856314b
--- /dev/null
+++ b/devtools/client/styleeditor/test/doc_long_string.css
@@ -0,0 +1,43 @@
+/* CSS file longer than the server's long string limit of 10000 bytes */
+
+/*
+Copyright (c) 2011, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.com/yui/license.html
+version: 2.9.0
+*/
+.yui-calcontainer{position:relative;float:left;_overflow:hidden}.yui-calcontainer iframe{position:absolute;border:0;margin:0;padding:0;z-index:0;width:100%;height:100%;left:0;top:0}.yui-calcontainer iframe.fixedsize{width:50em;height:50em;top:-1px;left:-1px}.yui-calcontainer.multi .groupcal{z-index:1;float:left;position:relative}.yui-calcontainer .title{position:relative;z-index:1}.yui-calcontainer .close-icon{position:absolute;z-index:1;text-indent:-10000em;overflow:hidden}.yui-calendar{position:relative}.yui-calendar .calnavleft{position:absolute;z-index:1;text-indent:-10000em;overflow:hidden}.yui-calendar .calnavright{position:absolute;z-index:1;text-indent:-10000em;overflow:hidden}.yui-calendar .calheader{position:relative;width:100%;text-align:center}.yui-calcontainer .yui-cal-nav-mask{position:absolute;z-index:2;margin:0;padding:0;width:100%;height:100%;_width:0;_height:0;left:0;top:0;display:none}.yui-calcontainer .yui-cal-nav{position:absolute;z-index:3;top:0;display:none}.yui-calcontainer .yui-cal-nav .yui-cal-nav-btn{display:-moz-inline-box;display:inline-block}.yui-calcontainer .yui-cal-nav .yui-cal-nav-btn button{display:block;*display:inline-block;*overflow:visible;border:0;background-color:transparent;cursor:pointer}.yui-calendar .calbody a:hover{background:inherit}p#clear{clear:left;padding-top:10px}.yui-skin-sam .yui-calcontainer{background-color:#f2f2f2;border:1px solid #808080;padding:10px}.yui-skin-sam .yui-calcontainer.multi{padding:0 5px 0 5px}.yui-skin-sam .yui-calcontainer.multi .groupcal{background-color:transparent;border:0;padding:10px 5px 10px 5px;margin:0}.yui-skin-sam .yui-calcontainer .title{background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 0;border-bottom:1px solid #ccc;font:100% sans-serif;color:#000;font-weight:bold;height:auto;padding:.4em;margin:0 -10px 10px -10px;top:0;left:0;text-align:left}.yui-skin-sam .yui-calcontainer.multi .title{margin:0 -5px 0 -5px}.yui-skin-sam .yui-calcontainer.withtitle{padding-top:0}.yui-skin-sam .yui-calcontainer .calclose{background:url(../js/yui/assets/skins/sam/sprite.png) no-repeat 0 -300px;width:25px;height:15px;top:.4em;right:.4em;cursor:pointer}.yui-skin-sam .yui-calendar{border-spacing:0;border-collapse:collapse;font:100% sans-serif;text-align:center;margin:0}.yui-skin-sam .yui-calendar .calhead{background:transparent;border:0;vertical-align:middle;padding:0}.yui-skin-sam .yui-calendar .calheader{background:transparent;font-weight:bold;padding:0 0 .6em 0;text-align:center}.yui-skin-sam .yui-calendar .calheader img{border:0}.yui-skin-sam .yui-calendar .calnavleft{background:url(../js/yui/assets/skins/sam/sprite.png) no-repeat 0 -450px;width:25px;height:15px;top:0;bottom:0;left:-10px;margin-left:.4em;cursor:pointer}.yui-skin-sam .yui-calendar .calnavright{background:url(../js/yui/assets/skins/sam/sprite.png) no-repeat 0 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.yui-calendar td.calcell.highlight4{background-color:#cf9}.yui-skin-sam .yui-calendar a.calnav{border:1px solid #f2f2f2;padding:0 4px;text-decoration:none;color:#000;zoom:1}.yui-skin-sam .yui-calendar a.calnav:hover{background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 0;border-color:#a0a0a0;cursor:pointer}.yui-skin-sam .yui-calcontainer .yui-cal-nav-mask{background-color:#000;opacity:.25;filter:alpha(opacity=25)}.yui-skin-sam .yui-calcontainer .yui-cal-nav{font-family:arial,helvetica,clean,sans-serif;font-size:93%;border:1px solid #808080;left:50%;margin-left:-7em;width:14em;padding:0;top:2.5em;background-color:#f2f2f2}.yui-skin-sam .yui-calcontainer.withtitle .yui-cal-nav{top:4.5em}.yui-skin-sam .yui-calcontainer.multi .yui-cal-nav{width:16em;margin-left:-8em}.yui-skin-sam .yui-calcontainer .yui-cal-nav-y,.yui-skin-sam .yui-calcontainer .yui-cal-nav-m,.yui-skin-sam .yui-calcontainer .yui-cal-nav-b{padding:5px 10px 5px 10px}.yui-skin-sam .yui-calcontainer 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+.yui-skin-sam .yui-calcontainer .yui-cal-nav-mc{width:100%;_width:auto}.yui-skin-sam .yui-calcontainer .yui-cal-nav-y input.yui-invalid{background-color:#ffee69;border:1px solid #000}.yui-skin-sam .yui-calcontainer .yui-cal-nav-yc{width:4em}.yui-skin-sam .yui-calcontainer .yui-cal-nav .yui-cal-nav-btn{border:1px solid #808080;background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 0;background-color:#ccc;margin:auto .15em}.yui-skin-sam .yui-calcontainer .yui-cal-nav .yui-cal-nav-btn button{padding:0 8px;font-size:93%;line-height:2;*line-height:1.7;min-height:2em;*min-height:auto;color:#000}.yui-skin-sam .yui-calcontainer .yui-cal-nav .yui-cal-nav-btn.yui-default{border:1px solid #304369;background-color:#426fd9;background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 -1400px}.yui-skin-sam .yui-calcontainer .yui-cal-nav .yui-cal-nav-btn.yui-default button{color:#fff}
+
+/*
+Copyright (c) 2011, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.com/yui/license.html
+version: 2.9.0
+*/
+.yui-overlay,.yui-panel-container{visibility:hidden;position:absolute;z-index:2}.yui-panel{position:relative}.yui-panel-container form{margin:0}.mask{z-index:1;display:none;position:absolute;top:0;left:0;right:0;bottom:0}.mask.block-scrollbars{overflow:auto}.masked select,.drag select,.hide-select select{_visibility:hidden}.yui-panel-container select{_visibility:inherit}.hide-scrollbars,.hide-scrollbars *{overflow:hidden}.hide-scrollbars select{display:none}.show-scrollbars{overflow:auto}.yui-panel-container.show-scrollbars,.yui-tt.show-scrollbars{overflow:visible}.yui-panel-container.show-scrollbars .underlay,.yui-tt.show-scrollbars .yui-tt-shadow{overflow:auto}.yui-panel-container.shadow .underlay.yui-force-redraw{padding-bottom:1px}.yui-effect-fade .underlay,.yui-effect-fade .yui-tt-shadow{display:none}.yui-tt-shadow{position:absolute}.yui-override-padding{padding:0!important}.yui-panel-container .container-close{overflow:hidden;text-indent:-10000em;text-decoration:none}.yui-overlay.yui-force-redraw,.yui-panel-container.yui-force-redraw{margin-bottom:1px}.yui-skin-sam .mask{background-color:#000;opacity:.25;filter:alpha(opacity=25)}.yui-skin-sam .yui-panel-container{padding:0 1px;*padding:2px}.yui-skin-sam .yui-panel{position:relative;left:0;top:0;border-style:solid;border-width:1px 0;border-color:#808080;z-index:1;*border-width:1px;*zoom:1;_zoom:normal}.yui-skin-sam .yui-panel .hd,.yui-skin-sam .yui-panel .bd,.yui-skin-sam .yui-panel .ft{border-style:solid;border-width:0 1px;border-color:#808080;margin:0 -1px;*margin:0;*border:0}.yui-skin-sam .yui-panel .hd{border-bottom:solid 1px #ccc}.yui-skin-sam .yui-panel .bd,.yui-skin-sam .yui-panel .ft{background-color:#f2f2f2}.yui-skin-sam .yui-panel .hd{padding:0 10px;font-size:93%;line-height:2;*line-height:1.9;font-weight:bold;color:#000;background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 -200px}.yui-skin-sam .yui-panel .bd{padding:10px}.yui-skin-sam .yui-panel .ft{border-top:solid 1px #808080;padding:5px 10px;font-size:77%}.yui-skin-sam .container-close{position:absolute;top:5px;right:6px;width:25px;height:15px;background:url(../js/yui/assets/skins/sam/sprite.png) no-repeat 0 -300px;cursor:pointer}.yui-skin-sam .yui-panel-container .underlay{right:-1px;left:-1px}.yui-skin-sam .yui-panel-container.matte{padding:9px 10px;background-color:#fff}.yui-skin-sam .yui-panel-container.shadow{_padding:2px 4px 0 2px}.yui-skin-sam .yui-panel-container.shadow .underlay{position:absolute;top:2px;left:-3px;right:-3px;bottom:-3px;*top:4px;*left:-1px;*right:-1px;*bottom:-1px;_top:0;_left:0;_right:0;_bottom:0;_margin-top:3px;_margin-left:-1px;background-color:#000;opacity:.12;filter:alpha(opacity=12)}.yui-skin-sam .yui-dialog .ft{border-top:0;padding:0 10px 10px 10px;font-size:100%}.yui-skin-sam .yui-dialog .ft .button-group{display:block;text-align:right}.yui-skin-sam .yui-dialog .ft button.default{font-weight:bold}.yui-skin-sam .yui-dialog .ft span.default{border-color:#304369;background-position:0 -1400px}.yui-skin-sam .yui-dialog .ft span.default .first-child{border-color:#304369}.yui-skin-sam .yui-dialog .ft span.default button{color:#fff}.yui-skin-sam .yui-dialog .ft span.yui-button-disabled{background-position:0 -1500px;border-color:#ccc}.yui-skin-sam .yui-dialog .ft span.yui-button-disabled .first-child{border-color:#ccc}.yui-skin-sam .yui-dialog .ft span.yui-button-disabled button{color:#a6a6a6}.yui-skin-sam .yui-simple-dialog .bd .yui-icon{background:url(../js/yui/assets/skins/sam/sprite.png) no-repeat 0 0;width:16px;height:16px;margin-right:10px;float:left}.yui-skin-sam .yui-simple-dialog .bd span.blckicon{background-position:0 -1100px}.yui-skin-sam .yui-simple-dialog .bd span.alrticon{background-position:0 -1050px}.yui-skin-sam .yui-simple-dialog .bd span.hlpicon{background-position:0 -1150px}.yui-skin-sam .yui-simple-dialog .bd span.infoicon{background-position:0 -1200px}.yui-skin-sam .yui-simple-dialog .bd span.warnicon{background-position:0 -1900px}.yui-skin-sam .yui-simple-dialog .bd span.tipicon{background-position:0 -1250px}.yui-skin-sam .yui-tt .bd{position:relative;top:0;left:0;z-index:1;color:#000;padding:2px 5px;border-color:#d4c237 #A6982b #a6982b #A6982B;border-width:1px;border-style:solid;background-color:#ffee69}.yui-skin-sam .yui-tt.show-scrollbars .bd{overflow:auto}.yui-skin-sam .yui-tt-shadow{top:2px;right:-3px;left:-3px;bottom:-3px;background-color:#000}.yui-skin-sam .yui-tt-shadow-visible{opacity:.12;filter:alpha(opacity=12)}
+
+/*
+Copyright (c) 2011, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.com/yui/license.html
+version: 2.9.0
+*/
+.yui-skin-sam .yui-dt-mask{position:absolute;z-index:9500}.yui-dt-tmp{position:absolute;left:-9000px}.yui-dt-scrollable .yui-dt-bd{overflow:auto}.yui-dt-scrollable .yui-dt-hd{overflow:hidden;position:relative}.yui-dt-scrollable .yui-dt-bd thead tr,.yui-dt-scrollable .yui-dt-bd thead th{position:absolute;left:-1500px}.yui-dt-scrollable tbody{-moz-outline:0}.yui-skin-sam thead .yui-dt-sortable{cursor:pointer}.yui-skin-sam thead .yui-dt-draggable{cursor:move}.yui-dt-coltarget{position:absolute;z-index:999}.yui-dt-hd{zoom:1}th.yui-dt-resizeable .yui-dt-resizerliner{position:relative}.yui-dt-resizer{position:absolute;right:0;bottom:0;height:100%;cursor:e-resize;cursor:col-resize;background-color:#CCC;opacity:0;filter:alpha(opacity=0)}.yui-dt-resizerproxy{visibility:hidden;position:absolute;z-index:9000;background-color:#CCC;opacity:0;filter:alpha(opacity=0)}th.yui-dt-hidden .yui-dt-liner,td.yui-dt-hidden .yui-dt-liner,th.yui-dt-hidden 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.yui-dt-coltarget{width:5px;background-color:red}.yui-skin-sam .yui-dt td{margin:0;padding:0;border:0;border-right:1px solid #cbcbcb;text-align:left}.yui-skin-sam .yui-dt-list td{border-right:0}.yui-skin-sam .yui-dt-resizer{width:6px}.yui-skin-sam .yui-dt-mask{background-color:#000;opacity:.25;filter:alpha(opacity=25)}.yui-skin-sam .yui-dt-message{background-color:#FFF}.yui-skin-sam .yui-dt-scrollable table{border:0}.yui-skin-sam .yui-dt-scrollable .yui-dt-hd{border-left:1px solid #7f7f7f;border-top:1px solid #7f7f7f;border-right:1px solid #7f7f7f}.yui-skin-sam .yui-dt-scrollable .yui-dt-bd{border-left:1px solid #7f7f7f;border-bottom:1px solid #7f7f7f;border-right:1px solid #7f7f7f;background-color:#FFF}.yui-skin-sam .yui-dt-scrollable .yui-dt-data tr.yui-dt-last td{border-bottom:1px solid #7f7f7f}.yui-skin-sam th.yui-dt-asc,.yui-skin-sam th.yui-dt-desc{background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 -100px}.yui-skin-sam th.yui-dt-sortable .yui-dt-label{margin-right:10px}.yui-skin-sam th.yui-dt-asc .yui-dt-liner{background:url(../js/yui/assets/skins/sam/dt-arrow-up.png) no-repeat right}.yui-skin-sam th.yui-dt-desc .yui-dt-liner{background:url(../js/yui/assets/skins/sam/dt-arrow-dn.png) no-repeat right}tbody .yui-dt-editable{cursor:pointer}.yui-dt-editor{text-align:left;background-color:#f2f2f2;border:1px solid #808080;padding:6px}.yui-dt-editor label{padding-left:4px;padding-right:6px}.yui-dt-editor .yui-dt-button{padding-top:6px;text-align:right}.yui-dt-editor .yui-dt-button button{background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 0;border:1px solid #999;width:4em;height:1.8em;margin-left:6px}.yui-dt-editor .yui-dt-button button.yui-dt-default{background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 -1400px;background-color:#5584e0;border:1px solid #304369;color:#FFF}.yui-dt-editor .yui-dt-button button:hover{background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 -1300px;color:#000}.yui-dt-editor .yui-dt-button button:active{background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 -1700px;color:#000}.yui-skin-sam tr.yui-dt-even{background-color:#FFF}.yui-skin-sam tr.yui-dt-odd{background-color:#edf5ff}.yui-skin-sam tr.yui-dt-even td.yui-dt-asc,.yui-skin-sam tr.yui-dt-even td.yui-dt-desc{background-color:#edf5ff}.yui-skin-sam tr.yui-dt-odd td.yui-dt-asc,.yui-skin-sam tr.yui-dt-odd td.yui-dt-desc{background-color:#dbeaff}.yui-skin-sam .yui-dt-list tr.yui-dt-even{background-color:#FFF}.yui-skin-sam .yui-dt-list tr.yui-dt-odd{background-color:#FFF}.yui-skin-sam .yui-dt-list tr.yui-dt-even td.yui-dt-asc,.yui-skin-sam .yui-dt-list tr.yui-dt-even td.yui-dt-desc{background-color:#edf5ff}.yui-skin-sam .yui-dt-list tr.yui-dt-odd td.yui-dt-asc,.yui-skin-sam .yui-dt-list tr.yui-dt-odd td.yui-dt-desc{background-color:#edf5ff}.yui-skin-sam th.yui-dt-highlighted,.yui-skin-sam th.yui-dt-highlighted a{background-color:#b2d2ff}.yui-skin-sam tr.yui-dt-highlighted,.yui-skin-sam tr.yui-dt-highlighted td.yui-dt-asc,.yui-skin-sam tr.yui-dt-highlighted td.yui-dt-desc,.yui-skin-sam tr.yui-dt-even td.yui-dt-highlighted,.yui-skin-sam tr.yui-dt-odd td.yui-dt-highlighted{cursor:pointer;background-color:#b2d2ff}.yui-skin-sam .yui-dt-list th.yui-dt-highlighted,.yui-skin-sam .yui-dt-list th.yui-dt-highlighted a{background-color:#b2d2ff}.yui-skin-sam .yui-dt-list tr.yui-dt-highlighted,.yui-skin-sam .yui-dt-list tr.yui-dt-highlighted td.yui-dt-asc,.yui-skin-sam .yui-dt-list tr.yui-dt-highlighted td.yui-dt-desc,.yui-skin-sam .yui-dt-list tr.yui-dt-even td.yui-dt-highlighted,.yui-skin-sam .yui-dt-list tr.yui-dt-odd td.yui-dt-highlighted{cursor:pointer;background-color:#b2d2ff}.yui-skin-sam th.yui-dt-selected,.yui-skin-sam th.yui-dt-selected a{background-color:#446cd7}.yui-skin-sam tr.yui-dt-selected td,.yui-skin-sam tr.yui-dt-selected td.yui-dt-asc,.yui-skin-sam tr.yui-dt-selected td.yui-dt-desc{background-color:#426fd9;color:#FFF}.yui-skin-sam tr.yui-dt-even td.yui-dt-selected,.yui-skin-sam tr.yui-dt-odd td.yui-dt-selected{background-color:#446cd7;color:#FFF}.yui-skin-sam .yui-dt-list th.yui-dt-selected,.yui-skin-sam .yui-dt-list th.yui-dt-selected a{background-color:#446cd7}
+.yui-skin-sam .yui-dt-list tr.yui-dt-selected td,.yui-skin-sam .yui-dt-list tr.yui-dt-selected td.yui-dt-asc,.yui-skin-sam .yui-dt-list tr.yui-dt-selected td.yui-dt-desc{background-color:#426fd9;color:#FFF}.yui-skin-sam .yui-dt-list tr.yui-dt-even td.yui-dt-selected,.yui-skin-sam .yui-dt-list tr.yui-dt-odd td.yui-dt-selected{background-color:#446cd7;color:#FFF}.yui-skin-sam .yui-dt-paginator{display:block;margin:6px 0;white-space:nowrap}.yui-skin-sam .yui-dt-paginator .yui-dt-first,.yui-skin-sam .yui-dt-paginator .yui-dt-last,.yui-skin-sam .yui-dt-paginator .yui-dt-selected{padding:2px 6px}.yui-skin-sam .yui-dt-paginator a.yui-dt-first,.yui-skin-sam .yui-dt-paginator a.yui-dt-last{text-decoration:none}.yui-skin-sam .yui-dt-paginator .yui-dt-previous,.yui-skin-sam .yui-dt-paginator .yui-dt-next{display:none}.yui-skin-sam a.yui-dt-page{border:1px solid #cbcbcb;padding:2px 6px;text-decoration:none;background-color:#fff}.yui-skin-sam .yui-dt-selected{border:1px solid #fff;background-color:#fff}
+
+/*
+Copyright (c) 2011, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.com/yui/license.html
+version: 2.9.0
+*/
+.yui-button{display:-moz-inline-box;display:inline-block;vertical-align:text-bottom;}.yui-button .first-child{display:block;*display:inline-block;}.yui-button button,.yui-button a{display:block;*display:inline-block;border:none;margin:0;}.yui-button button{background-color:transparent;*overflow:visible;cursor:pointer;}.yui-button a{text-decoration:none;}.yui-skin-sam .yui-button{border-width:1px 0;border-style:solid;border-color:#808080;background:url(../js/yui/assets/skins/sam/sprite.png) repeat-x 0 0;margin:auto .25em;}.yui-skin-sam .yui-button .first-child{border-width:0 1px;border-style:solid;border-color:#808080;margin:0 -1px;_margin:0;}.yui-skin-sam .yui-button button,.yui-skin-sam .yui-button a,.yui-skin-sam .yui-button a:visited{padding:0 10px;font-size:93%;line-height:2;*line-height:1.7;min-height:2em;*min-height:auto;color:#000;}.yui-skin-sam .yui-button a{*line-height:1.875;*padding-bottom:1px;}.yui-skin-sam .yui-split-button button,.yui-skin-sam .yui-menu-button button{padding-right:20px;background-position:right center;background-repeat:no-repeat;}.yui-skin-sam .yui-menu-button button{background-image:url(../js/yui/assets/skins/sam/menu-button-arrow.png);}.yui-skin-sam .yui-split-button button{background-image:url(../js/yui/assets/skins/sam/split-button-arrow.png);}.yui-skin-sam .yui-button-focus{border-color:#7D98B8;background-position:0 -1300px;}.yui-skin-sam .yui-button-focus .first-child{border-color:#7D98B8;}.yui-skin-sam .yui-split-button-focus button{background-image:url(../js/yui/assets/skins/sam/split-button-arrow-focus.png);}.yui-skin-sam .yui-button-hover{border-color:#7D98B8;background-position:0 -1300px;}.yui-skin-sam .yui-button-hover .first-child{border-color:#7D98B8;}.yui-skin-sam .yui-split-button-hover button{background-image:url(../js/yui/assets/skins/sam/split-button-arrow-hover.png);}.yui-skin-sam .yui-button-active{border-color:#7D98B8;background-position:0 -1700px;}.yui-skin-sam .yui-button-active .first-child{border-color:#7D98B8;}.yui-skin-sam .yui-split-button-activeoption{border-color:#808080;background-position:0 0;}.yui-skin-sam .yui-split-button-activeoption .first-child{border-color:#808080;}.yui-skin-sam .yui-split-button-activeoption button{background-image:url(../js/yui/assets/skins/sam/split-button-arrow-active.png);}.yui-skin-sam .yui-radio-button-checked,.yui-skin-sam .yui-checkbox-button-checked{border-color:#304369;background-position:0 -1400px;}.yui-skin-sam .yui-radio-button-checked .first-child,.yui-skin-sam .yui-checkbox-button-checked .first-child{border-color:#304369;}.yui-skin-sam .yui-radio-button-checked button,.yui-skin-sam .yui-checkbox-button-checked button{color:#fff;}.yui-skin-sam .yui-button-disabled{border-color:#ccc;background-position:0 -1500px;}.yui-skin-sam .yui-button-disabled .first-child{border-color:#ccc;}.yui-skin-sam .yui-button-disabled button,.yui-skin-sam .yui-button-disabled a,.yui-skin-sam .yui-button-disabled a:visited{color:#A6A6A6;cursor:default;}.yui-skin-sam .yui-menu-button-disabled button{background-image:url(../js/yui/assets/skins/sam/menu-button-arrow-disabled.png);}.yui-skin-sam .yui-split-button-disabled button{background-image:url(../js/yui/assets/skins/sam/split-button-arrow-disabled.png);}
+
+/*
+Copyright (c) 2011, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.com/yui/license.html
+version: 2.9.0
+*/
+.yui-skin-sam .yui-pg-container{display:block;margin:6px 0;white-space:nowrap}.yui-skin-sam .yui-pg-first,.yui-skin-sam .yui-pg-previous,.yui-skin-sam .yui-pg-next,.yui-skin-sam .yui-pg-last,.yui-skin-sam .yui-pg-current,.yui-skin-sam .yui-pg-pages,.yui-skin-sam .yui-pg-page{display:inline-block;font-family:arial,helvetica,clean,sans-serif;padding:3px 6px;zoom:1}.yui-skin-sam .yui-pg-pages{padding:0}.yui-skin-sam .yui-pg-current{padding:3px 0}.yui-skin-sam a.yui-pg-first:link,.yui-skin-sam a.yui-pg-first:visited,.yui-skin-sam a.yui-pg-first:active,.yui-skin-sam a.yui-pg-first:hover,.yui-skin-sam a.yui-pg-previous:link,.yui-skin-sam a.yui-pg-previous:visited,.yui-skin-sam a.yui-pg-previous:active,.yui-skin-sam a.yui-pg-previous:hover,.yui-skin-sam a.yui-pg-next:link,.yui-skin-sam a.yui-pg-next:visited,.yui-skin-sam a.yui-pg-next:active,.yui-skin-sam a.yui-pg-next:hover,.yui-skin-sam a.yui-pg-last:link,.yui-skin-sam a.yui-pg-last:visited,.yui-skin-sam a.yui-pg-last:active,.yui-skin-sam a.yui-pg-last:hover,.yui-skin-sam a.yui-pg-page:link,.yui-skin-sam a.yui-pg-page:visited,.yui-skin-sam a.yui-pg-page:active,.yui-skin-sam a.yui-pg-page:hover{color:#06c;text-decoration:underline;outline:0}.yui-skin-sam span.yui-pg-first,.yui-skin-sam span.yui-pg-previous,.yui-skin-sam span.yui-pg-next,.yui-skin-sam span.yui-pg-last{color:#a6a6a6}.yui-skin-sam .yui-pg-page{background-color:#fff;border:1px solid #cbcbcb;padding:2px 6px;text-decoration:none}.yui-skin-sam .yui-pg-current-page{background-color:transparent;border:0;font-weight:bold;padding:3px 6px}.yui-skin-sam .yui-pg-page{margin-left:1px;margin-right:1px}.yui-skin-sam .yui-pg-first,.yui-skin-sam .yui-pg-previous{padding-left:0}.yui-skin-sam .yui-pg-next,.yui-skin-sam .yui-pg-last{padding-right:0}.yui-skin-sam .yui-pg-current,.yui-skin-sam .yui-pg-rpp-options{margin-left:1em;margin-right:1em}
diff --git a/devtools/client/styleeditor/test/doc_short_string.css b/devtools/client/styleeditor/test/doc_short_string.css
new file mode 100644
index 0000000000..585dccea1a
--- /dev/null
+++ b/devtools/client/styleeditor/test/doc_short_string.css
@@ -0,0 +1,15 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* ☺ */
+
+body {
+  background: white;
+}
+
+div {
+  font-size: 4em;
+}
+
+div > span {
+   text-decoration: underline;
+}
diff --git a/devtools/client/styleeditor/test/doc_sourcemap_chrome.html b/devtools/client/styleeditor/test/doc_sourcemap_chrome.html
new file mode 100644
index 0000000000..5052897708
--- /dev/null
+++ b/devtools/client/styleeditor/test/doc_sourcemap_chrome.html
@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Testcase for sourcemap URLs pointing to unsupported protocols</title>
+  <link rel="stylesheet" type="text/css" href="sourcemap-css/sourcemaps_chrome.css"/>
+</head>
+<body>
+  <div>Protocol test</div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/doc_xulpage.xhtml b/devtools/client/styleeditor/test/doc_xulpage.xhtml
new file mode 100644
index 0000000000..41385afa4a
--- /dev/null
+++ b/devtools/client/styleeditor/test/doc_xulpage.xhtml
@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="simple.css" type="text/css"?>
+<!DOCTYPE window>
+<window xmlns:html="http://www.w3.org/1999/xhtml"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <label value="Simple XUL document" />
+</window>
diff --git a/devtools/client/styleeditor/test/four.html b/devtools/client/styleeditor/test/four.html
new file mode 100644
index 0000000000..c0d51d691c
--- /dev/null
+++ b/devtools/client/styleeditor/test/four.html
@@ -0,0 +1,25 @@
+<!doctype html>
+<html>
+<head>
+  <title>four stylesheets</title>
+  <link rel="stylesheet" type="text/css" media="scren" href="simple.css"/>
+  <style type="text/css">
+  div {
+    font-size: 2em;
+  }
+  </style>
+  <style type="text/css">
+  span {
+    font-size: 3em;
+  }
+  </style>
+  <style type="text/css">
+  p {
+    font-size: 4em;
+  }
+  </style>
+</head>
+<body>
+	<div>four <span>stylesheets</span></div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/head.js b/devtools/client/styleeditor/test/head.js
new file mode 100644
index 0000000000..f685eca9bb
--- /dev/null
+++ b/devtools/client/styleeditor/test/head.js
@@ -0,0 +1,201 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/* All top-level definitions here are exports.  */
+/* eslint no-unused-vars: [2, {"vars": "local"}] */
+
+"use strict";
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/devtools/client/inspector/shared/test/head.js",
+  this
+);
+
+const TEST_BASE =
+  "chrome://mochitests/content/browser/devtools/client/styleeditor/test/";
+const TEST_BASE_HTTP =
+  "http://example.com/browser/devtools/client/styleeditor/test/";
+const TEST_BASE_HTTPS =
+  "https://example.com/browser/devtools/client/styleeditor/test/";
+const TEST_HOST = "mochi.test:8888";
+
+/**
+ * Add a new test tab in the browser and load the given url.
+ * @param {String} url The url to be loaded in the new tab
+ * @param {Window} win The window to add the tab to (default: current window).
+ * @return a promise that resolves to the tab object when the url is loaded
+ */
+var addTab = function (url, win) {
+  info("Adding a new tab with URL: '" + url + "'");
+
+  return new Promise(resolve => {
+    const targetWindow = win || window;
+    const targetBrowser = targetWindow.gBrowser;
+
+    const tab = (targetBrowser.selectedTab = BrowserTestUtils.addTab(
+      targetBrowser,
+      url
+    ));
+    BrowserTestUtils.browserLoaded(targetBrowser.selectedBrowser).then(
+      function () {
+        info("URL '" + url + "' loading complete");
+        resolve(tab);
+      }
+    );
+  });
+};
+
+var navigateToAndWaitForStyleSheets = async function (url, ui, editorCount) {
+  const onClear = ui.once("stylesheets-clear");
+  await navigateTo(url);
+  await onClear;
+  await waitUntil(() => ui.editors.length === editorCount);
+};
+
+var reloadPageAndWaitForStyleSheets = async function (ui, editorCount) {
+  info("Reloading the page.");
+
+  const onClear = ui.once("stylesheets-clear");
+  let count = 0;
+  const onAllEditorAdded = new Promise(res => {
+    const off = ui.on("editor-added", editor => {
+      count++;
+      info(`Received ${editor.friendlyName} (${count}/${editorCount})`);
+      if (count == editorCount) {
+        res();
+        off();
+      }
+    });
+  });
+
+  await reloadBrowser();
+  await onClear;
+
+  await onAllEditorAdded;
+  info("All expected editors added");
+};
+
+/**
+ * Open the style editor for the current tab.
+ */
+var openStyleEditor = async function (tab) {
+  if (!tab) {
+    tab = gBrowser.selectedTab;
+  }
+  const toolbox = await gDevTools.showToolboxForTab(tab, {
+    toolId: "styleeditor",
+  });
+  const panel = toolbox.getPanel("styleeditor");
+  const ui = panel.UI;
+
+  return { toolbox, panel, ui };
+};
+
+/**
+ * Creates a new tab in specified window navigates it to the given URL and
+ * opens style editor in it.
+ */
+var openStyleEditorForURL = async function (url, win) {
+  const tab = await addTab(url, win);
+  const result = await openStyleEditor(tab);
+  result.tab = tab;
+  return result;
+};
+
+/**
+ * Send an async message to the frame script and get back the requested
+ * computed style property.
+ *
+ * @param {String} selector
+ *        The selector used to obtain the element.
+ * @param {String} pseudo
+ *        pseudo id to query, or null.
+ * @param {String} name
+ *        name of the property.
+ */
+var getComputedStyleProperty = async function (args) {
+  return SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [args],
+    function ({ selector, pseudo, name }) {
+      const element = content.document.querySelector(selector);
+      const style = content.getComputedStyle(element, pseudo);
+      return style.getPropertyValue(name);
+    }
+  );
+};
+
+/**
+ * Wait for "at-rules-list-changed" events to settle on StyleEditorUI.
+ * Returns a promise that resolves the number of events caught while waiting.
+ *
+ * @param {StyleEditorUI} ui
+ *        Current StyleEditorUI on which at-rules-list-changed events should be fired.
+ * @param {Number} delay
+ */
+function waitForManyEvents(ui, delay) {
+  return new Promise(resolve => {
+    let timer;
+    let count = 0;
+    const onEvent = () => {
+      count++;
+      clearTimeout(timer);
+
+      // Wait for some time to catch subsequent events.
+      timer = setTimeout(() => {
+        // Remove the listener and resolve.
+        ui.off("at-rules-list-changed", onEvent);
+        resolve(count);
+      }, delay);
+    };
+    ui.on("at-rules-list-changed", onEvent);
+  });
+}
+
+/**
+ * Creates a new style sheet in the Style Editor
+
+ * @param {StyleEditorUI} ui
+ *        Current StyleEditorUI on which to simulate pressing the + button.
+ * @param {Window} panelWindow
+ *        The panelWindow property of the current Style Editor panel.
+ */
+function createNewStyleSheet(ui, panelWindow) {
+  info("Creating a new stylesheet now");
+
+  return new Promise(resolve => {
+    ui.once("editor-added", editor => {
+      editor.getSourceEditor().then(resolve);
+    });
+
+    waitForFocus(function () {
+      // create a new style sheet
+      const newButton = panelWindow.document.querySelector(
+        ".style-editor-newButton"
+      );
+      ok(newButton, "'new' button exists");
+
+      EventUtils.synthesizeMouseAtCenter(newButton, {}, panelWindow);
+    }, panelWindow);
+  });
+}
+
+/**
+ * Returns the panel root element (StyleEditorUI._root)
+ *
+ * @param {StyleEditorPanel} panel
+ * @returns {Element}
+ */
+function getRootElement(panel) {
+  return panel.panelWindow.document.getElementById("style-editor-chrome");
+}
+
+/**
+ * Returns the panel context menu element
+ *
+ * @param {StyleEditorPanel} panel
+ * @returns {Element}
+ */
+function getContextMenuElement(panel) {
+  return panel.panelWindow.document.getElementById("sidebar-context");
+}
diff --git a/devtools/client/styleeditor/test/iframe_service_worker.js b/devtools/client/styleeditor/test/iframe_service_worker.js
new file mode 100644
index 0000000000..56c32c204a
--- /dev/null
+++ b/devtools/client/styleeditor/test/iframe_service_worker.js
@@ -0,0 +1,12 @@
+"use strict";
+
+self.onfetch = function (event) {
+  if (event.request.url.includes("sheet.css")) {
+    return event.respondWith(new Response("* { color: green; }"));
+  }
+  return null;
+};
+
+self.onactivate = function (event) {
+  event.waitUntil(self.clients.claim());
+};
diff --git a/devtools/client/styleeditor/test/iframe_with_service_worker.html b/devtools/client/styleeditor/test/iframe_with_service_worker.html
new file mode 100644
index 0000000000..690515775e
--- /dev/null
+++ b/devtools/client/styleeditor/test/iframe_with_service_worker.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+
+Iframe loading a stylesheet via a service worker
+<script>
+"use strict";
+
+function waitForActive(swr) {
+  const sw = swr.installing || swr.waiting || swr.active;
+  return new Promise(resolve => {
+    if (sw.state === "activated") {
+      resolve(swr);
+      return;
+    }
+    sw.addEventListener("statechange", function onStateChange(evt) {
+      if (sw.state === "activated") {
+        sw.removeEventListener("statechange", onStateChange);
+        resolve(swr);
+      }
+    });
+  });
+}
+
+navigator.serviceWorker.register("iframe_service_worker.js", {scope: "."})
+  .then(registration => waitForActive(registration))
+  .then(() => {
+    const link = document.createElement("link");
+    link.setAttribute("rel", "stylesheet");
+    link.setAttribute("type", "text/css");
+    link.setAttribute("href", "sheet.css");
+    document.documentElement.appendChild(link);
+  });
+</script>
diff --git a/devtools/client/styleeditor/test/import.css b/devtools/client/styleeditor/test/import.css
new file mode 100644
index 0000000000..485688c0e6
--- /dev/null
+++ b/devtools/client/styleeditor/test/import.css
@@ -0,0 +1,8 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+@import url(import2.css);
+
+body {
+  margin: 0;
+}
diff --git a/devtools/client/styleeditor/test/import.html b/devtools/client/styleeditor/test/import.html
new file mode 100644
index 0000000000..bc92baeba0
--- /dev/null
+++ b/devtools/client/styleeditor/test/import.html
@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+<head>
+  <title>import testcase</title>
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="simple.css"/>
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="import.css"/>
+</head>
+<body>
+  <div>import <span>testcase</span></div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/import2.css b/devtools/client/styleeditor/test/import2.css
new file mode 100644
index 0000000000..6037d4b10c
--- /dev/null
+++ b/devtools/client/styleeditor/test/import2.css
@@ -0,0 +1,8 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+@import url(import.css);
+
+p {
+  padding: 5px;
+}
diff --git a/devtools/client/styleeditor/test/inline-1.html b/devtools/client/styleeditor/test/inline-1.html
new file mode 100644
index 0000000000..76478893b2
--- /dev/null
+++ b/devtools/client/styleeditor/test/inline-1.html
@@ -0,0 +1,19 @@
+<!doctype html>
+<html>
+ <head>
+  <title>Inline test page #1</title>
+  <style type="text/css">
+    .second {
+     font-size:2em;
+    }
+  </style>
+  <style type="text/css">
+    .first {
+     font-size:3em;
+    }
+  </style>
+ </head>
+ <body class="first">
+   Inline test page #1
+ </body>
+</html>
diff --git a/devtools/client/styleeditor/test/inline-2.html b/devtools/client/styleeditor/test/inline-2.html
new file mode 100644
index 0000000000..e25285c31e
--- /dev/null
+++ b/devtools/client/styleeditor/test/inline-2.html
@@ -0,0 +1,19 @@
+<!doctype html>
+<html>
+ <head>
+  <title>Inline test page #2</title>
+  <style type="text/css">
+    .second {
+     font-size:2em;
+    }
+  </style>
+  <style type="text/css">
+    .first {
+     font-size:3em;
+    }
+  </style>
+ </head>
+ <body class="second">
+   Inline test page #2
+ </body>
+</html>
diff --git a/devtools/client/styleeditor/test/longload.html b/devtools/client/styleeditor/test/longload.html
new file mode 100644
index 0000000000..30a3802798
--- /dev/null
+++ b/devtools/client/styleeditor/test/longload.html
@@ -0,0 +1,29 @@
+<!doctype html>
+<html>
+<head>
+  <title>Long load</title>
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="simple.css"/>
+  <style type="text/css">
+  body {
+    background: white;
+  }
+
+  div {
+    font-size: 4em;
+  }
+
+  div > span {
+     text-decoration: underline;
+  }
+  </style>
+</head>
+<body>
+  Time passes:
+  <script type="application/javascript">
+    "use strict";
+    for (let i = 0; i < 5000; i++) {
+      document.write("<br>...");
+    }
+  </script>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/longname.html b/devtools/client/styleeditor/test/longname.html
new file mode 100644
index 0000000000..111e67a2b9
--- /dev/null
+++ b/devtools/client/styleeditor/test/longname.html
@@ -0,0 +1,12 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>long name testcase</title>
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="simple.css"/>
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="veryveryverylongnamethatcanbreakthestyleeditor.css"/>
+</head>
+<body>
+	<div>long name testcase</div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/many-media-rules-sourcemaps/index.html b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/index.html
new file mode 100644
index 0000000000..9734231b99
--- /dev/null
+++ b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/index.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title></title>
+  <link rel="stylesheet" type="text/css" href="sourcemap/sourcemap-css/sourcemaps.css"/>
+</head>
+
+<body>
+
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-css/sourcemaps.css b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-css/sourcemaps.css
new file mode 100644
index 0000000000..edb7860289
--- /dev/null
+++ b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-css/sourcemaps.css
@@ -0,0 +1,201 @@
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: green; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+@media (min-width: 500px) {
+  div {
+    color: red; } }
+
+/*# sourceMappingURL=sourcemaps.css.map */
diff --git a/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-css/sourcemaps.css.map b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-css/sourcemaps.css.map
new file mode 100644
index 0000000000..f792f65c4e
--- /dev/null
+++ b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-css/sourcemaps.css.map
@@ -0,0 +1,10 @@
+{
+	"version": 3,
+	"file": "sourcemaps.css",
+	"sources": [
+		"../sourcemap-sass/sourcemaps.scss",
+		"../sourcemap-sass/_partial.scss"
+	],
+	"names": [],
+	"mappings": "ACAA,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;AACnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,KAAK,GAAI;;ADtBnD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI;;AACjD,MAAM,EAAE,SAAS,EAAE,KAAK;EAAK,AAAA,GAAG,CAAC;IAAE,KAAK,EAAE,GAAG,GAAI"
+}
\ No newline at end of file
diff --git a/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-sass/_partial.scss b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-sass/_partial.scss
new file mode 100644
index 0000000000..7291ae831b
--- /dev/null
+++ b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-sass/_partial.scss
@@ -0,0 +1,25 @@
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
+@media (min-width: 500px) {  div { color: green; } }
diff --git a/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-sass/sourcemaps.scss b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-sass/sourcemaps.scss
new file mode 100644
index 0000000000..a8c25f0d85
--- /dev/null
+++ b/devtools/client/styleeditor/test/many-media-rules-sourcemaps/sourcemap/sourcemap-sass/sourcemaps.scss
@@ -0,0 +1,27 @@
+@import 'partial';
+
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
+@media (min-width: 500px) {  div { color: red; } }
diff --git a/devtools/client/styleeditor/test/media-rules-sourcemaps.html b/devtools/client/styleeditor/test/media-rules-sourcemaps.html
new file mode 100644
index 0000000000..ba18c35503
--- /dev/null
+++ b/devtools/client/styleeditor/test/media-rules-sourcemaps.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="UTF-8">
+  <link rel="stylesheet" type="text/css" href="sourcemap-css/media-rules.css"
+</head>
+<body>
+  <div>
+    Testing style editor media sidebar with source maps
+  </div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/media-rules.css b/devtools/client/styleeditor/test/media-rules.css
new file mode 100644
index 0000000000..1adce84c4b
--- /dev/null
+++ b/devtools/client/styleeditor/test/media-rules.css
@@ -0,0 +1,29 @@
+@media not all {
+  div {
+    color: blue;
+  }
+}
+
+@media all {
+  div {
+    color: red;
+  }
+}
+
+div {
+  width: 20px;
+  height: 20px;
+  background-color: ghostwhite;
+}
+
+@media (max-width: 550px) {
+  div {
+    color: green;
+  }
+}
+
+@media (min-height: 300px) and (max-height: 320px) {
+  div {
+    color: orange;
+  }
+}
diff --git a/devtools/client/styleeditor/test/media-rules.html b/devtools/client/styleeditor/test/media-rules.html
new file mode 100644
index 0000000000..f170e1efad
--- /dev/null
+++ b/devtools/client/styleeditor/test/media-rules.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="UTF-8">
+  <link rel="stylesheet" href="simple.css"/>
+  <link rel="stylesheet" href="media-rules.css"/>
+  <!-- This stylesheet is needed to ensure we cover the fix for Bug 1779043 -->
+  <style>
+    div {
+      color: salmon;
+    }
+  </style>
+  <style>
+    @media screen {
+      div {
+        outline: 1px solid tomato;
+      }
+
+      @supports (display: flex) {
+        @media (1px < height < 10000px) {
+          div {
+            display: flex;
+          }
+        }
+      }
+    }
+
+    @layer myLayer {}
+    @container (min-width: 1px) {}
+  </style>
+</head>
+<body>
+  <div>
+    Testing style editor media sidebar
+  </div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/media-small.css b/devtools/client/styleeditor/test/media-small.css
new file mode 100644
index 0000000000..ea21db4447
--- /dev/null
+++ b/devtools/client/styleeditor/test/media-small.css
@@ -0,0 +1,4 @@
+/* this stylesheet applies when min-width<400px */
+body {
+	background: red;
+}
diff --git a/devtools/client/styleeditor/test/media.html b/devtools/client/styleeditor/test/media.html
new file mode 100644
index 0000000000..81222edb8e
--- /dev/null
+++ b/devtools/client/styleeditor/test/media.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<html>
+<head>
+  <link rel="stylesheet" type="text/css" href="simple.css" media="screen,print"/>
+  <link rel="stylesheet" type="text/css" href="media-small.css" media="screen and (min-width: 200px)"/>
+</head>
+<body>
+	<div>test for media labels</div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/minified.html b/devtools/client/styleeditor/test/minified.html
new file mode 100644
index 0000000000..ab8c67d256
--- /dev/null
+++ b/devtools/client/styleeditor/test/minified.html
@@ -0,0 +1,15 @@
+<!doctype html>
+<html>
+<head>
+  <title>minified testcase</title>
+  <link rel="stylesheet" href="pretty.css"/>
+  <style type="text/css">body { background: red; }
+div {
+font-size: 5em;
+color: red
+}</style>
+</head>
+<body>
+	<div>minified <span>testcase</span></div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/missing.html b/devtools/client/styleeditor/test/missing.html
new file mode 100644
index 0000000000..ce4ec08be8
--- /dev/null
+++ b/devtools/client/styleeditor/test/missing.html
@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>missing stylesheet testcase</title>
+  <link rel="stylesheet" charset="utf-8" type="text/css" media="screen" href="missing-stylesheet.css"/>
+  <link rel="stylesheet" charset="utf-8" type="text/css" media="screen" href="simple.css"/>
+</head>
+<body>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/nostyle.html b/devtools/client/styleeditor/test/nostyle.html
new file mode 100644
index 0000000000..951945a72b
--- /dev/null
+++ b/devtools/client/styleeditor/test/nostyle.html
@@ -0,0 +1,5 @@
+<html>
+  <div>
+    Page with no stylesheets
+  </div>
+</html>
diff --git a/devtools/client/styleeditor/test/pretty.css b/devtools/client/styleeditor/test/pretty.css
new file mode 100644
index 0000000000..e597afa4bc
--- /dev/null
+++ b/devtools/client/styleeditor/test/pretty.css
@@ -0,0 +1,2 @@
+
+body{background:white;}div{font-size:4em;color:red}span{color:green;}
diff --git a/devtools/client/styleeditor/test/resources_inpage.jsi b/devtools/client/styleeditor/test/resources_inpage.jsi
new file mode 100644
index 0000000000..8b7895af52
--- /dev/null
+++ b/devtools/client/styleeditor/test/resources_inpage.jsi
@@ -0,0 +1,12 @@
+
+// This script is used from within browser_styleeditor_cmd_edit.html
+
+window.addEventListener('load', function() {
+  var pid = document.getElementById('pid');
+  var h3 = document.createElement('h3');
+  h3.id = 'h3id';
+  h3.classList.add('h3class');
+  h3.appendChild(document.createTextNode('h3'));
+  h3.setAttribute('data-a1', 'h3');
+  pid.parentNode.appendChild(h3);
+});
diff --git a/devtools/client/styleeditor/test/resources_inpage1.css b/devtools/client/styleeditor/test/resources_inpage1.css
new file mode 100644
index 0000000000..644deaaea7
--- /dev/null
+++ b/devtools/client/styleeditor/test/resources_inpage1.css
@@ -0,0 +1,11 @@
+@charset "utf-8";
+
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+#pid   { border-top: 2px dotted #F00; }
+#divid { border-top: 2px dotted #00F; }
+#h4id  { border-top: 2px dotted #0F0; }
+#h3id  { border-top: 2px dotted #FF0; }
diff --git a/devtools/client/styleeditor/test/resources_inpage2.css b/devtools/client/styleeditor/test/resources_inpage2.css
new file mode 100644
index 0000000000..e4fa48e530
--- /dev/null
+++ b/devtools/client/styleeditor/test/resources_inpage2.css
@@ -0,0 +1,11 @@
+@charset "utf-8";
+
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+*[data-a1=p]   { border-left: 4px solid #F00; }
+*[data-a1=div] { border-left: 4px solid #00F; }
+*[data-a1=h4]  { border-left: 4px solid #0F0; }
+*[data-a1=h3]  { border-left: 4px solid #FF0; }
diff --git a/devtools/client/styleeditor/test/selector-highlighter.html b/devtools/client/styleeditor/test/selector-highlighter.html
new file mode 100644
index 0000000000..e3b2f6f69c
--- /dev/null
+++ b/devtools/client/styleeditor/test/selector-highlighter.html
@@ -0,0 +1 @@
+<style>div{color:red}</style><div>highlighter test</div>
diff --git a/devtools/client/styleeditor/test/simple.css b/devtools/client/styleeditor/test/simple.css
new file mode 100644
index 0000000000..4d737f305e
--- /dev/null
+++ b/devtools/client/styleeditor/test/simple.css
@@ -0,0 +1,7 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* ☺ */
+
+body {
+  margin: 0;
+}
diff --git a/devtools/client/styleeditor/test/simple.css.gz b/devtools/client/styleeditor/test/simple.css.gz
new file mode 100644
index 0000000000..ee3b9efbc1
--- /dev/null
+++ b/devtools/client/styleeditor/test/simple.css.gz
diff --git a/devtools/client/styleeditor/test/simple.css.gz^headers^ b/devtools/client/styleeditor/test/simple.css.gz^headers^
new file mode 100644
index 0000000000..092020ab00
--- /dev/null
+++ b/devtools/client/styleeditor/test/simple.css.gz^headers^
@@ -0,0 +1,4 @@
+Vary: Accept-Encoding
+Content-Encoding: gzip
+Content-Type: text/css
+
diff --git a/devtools/client/styleeditor/test/simple.gz.html b/devtools/client/styleeditor/test/simple.gz.html
new file mode 100644
index 0000000000..d63362b8e0
--- /dev/null
+++ b/devtools/client/styleeditor/test/simple.gz.html
@@ -0,0 +1,23 @@
+<!doctype html>
+<html>
+<head>
+  <title>simple testcase</title>
+  <link rel="stylesheet" type="text/css" media="scren" href="simple.css.gz"/>
+  <style type="text/css">
+  body {
+    background: white;
+  }
+
+  div {
+    font-size: 4em;
+  }
+
+  div > span {
+     text-decoration: underline;
+  }
+  </style>
+</head>
+<body>
+	<div>simple <span>testcase</span></div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/simple.html b/devtools/client/styleeditor/test/simple.html
new file mode 100644
index 0000000000..8f25cdf61e
--- /dev/null
+++ b/devtools/client/styleeditor/test/simple.html
@@ -0,0 +1,24 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>simple testcase</title>
+  <link rel="stylesheet" charset="UTF-8" type="text/css" media="screen" href="simple.css"/>
+  <style type="text/css">
+  body {
+    background: white;
+  }
+
+  div {
+    font-size: 4em;
+  }
+
+  div > span {
+     text-decoration: underline;
+  }
+  </style>
+</head>
+<body>
+	<div>simple <span>testcase</span></div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/sjs_huge-css-server.sjs b/devtools/client/styleeditor/test/sjs_huge-css-server.sjs
new file mode 100644
index 0000000000..480fb1ca91
--- /dev/null
+++ b/devtools/client/styleeditor/test/sjs_huge-css-server.sjs
@@ -0,0 +1,19 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+function handleRequest(request, response) {
+  response.setStatusLine(request.httpVersion, 200, "Och Aye");
+
+  response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate");
+  response.setHeader("Pragma", "no-cache");
+  response.setHeader("Expires", "0");
+  response.setHeader("Content-Type", "text/plain; charset=utf-8", false);
+
+  // Taken from devtools/shared/webconsole/network-monitor
+  const NETMONITOR_LIMIT = 1048576;
+
+  // 2 * NETMONITOR_LIMIT reaches the exact limit for the netmonitor
+  // 3 * NETMONITOR_LIMIT makes sure we go past it.
+  response.write("x".repeat(3 * NETMONITOR_LIMIT));
+}
diff --git a/devtools/client/styleeditor/test/sourcemap-css/contained.css b/devtools/client/styleeditor/test/sourcemap-css/contained.css
new file mode 100644
index 0000000000..79572f6065
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/contained.css
@@ -0,0 +1,4 @@
+#header {
+  color: #f06; }
+
+/*# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiIiwic291cmNlcyI6WyJzYXNzL2NvbnRhaW5lZC5zY3NzIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiJBQUVBO0VBQ0UsT0FISyIsInNvdXJjZXNDb250ZW50IjpbIiRwaW5rOiAjZjA2O1xuXG4jaGVhZGVyIHtcbiAgY29sb3I6ICRwaW5rO1xufSJdfQ==*/
\ No newline at end of file
diff --git a/devtools/client/styleeditor/test/sourcemap-css/media-rules.css b/devtools/client/styleeditor/test/sourcemap-css/media-rules.css
new file mode 100644
index 0000000000..d4283200fd
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/media-rules.css
@@ -0,0 +1,8 @@
+@media screen and (max-width: 320px) {
+  div {
+    width: 100px; } }
+@media screen and (min-width: 1200px) {
+  div {
+    width: 400px; } }
+
+/*# sourceMappingURL=media-rules.css.map */
diff --git a/devtools/client/styleeditor/test/sourcemap-css/media-rules.css.map b/devtools/client/styleeditor/test/sourcemap-css/media-rules.css.map
new file mode 100644
index 0000000000..76cd48fe23
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/media-rules.css.map
@@ -0,0 +1,6 @@
+{
+"version": 3,
+"mappings": "AAIE,oCAA4C;EAD9C,GAAI;IAEA,KAAK,EAAE,KAAK;AAEd,qCAA4C;EAJ9C,GAAI;IAKA,KAAK,EAAE,KAAK",
+"sources": ["../sourcemap-sass/media-rules.scss"],
+"file": "media-rules.css"
+}
diff --git a/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css b/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css
new file mode 100644
index 0000000000..7246a9082a
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css
@@ -0,0 +1,7 @@
+div {
+  color: #ff0066; }
+
+span {
+  background-color: #EEE; }
+
+/*# sourceMappingURL=sourcemaps.css.map */
\ No newline at end of file
diff --git a/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css.map b/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css.map
new file mode 100644
index 0000000000..2e8f2911ce
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css.map
@@ -0,0 +1,6 @@
+{
+"version": 3,
+"mappings": "AAGA,GAAI;EACF,KAAK,EAHU,OAAI;;AAMrB,IAAK;EACH,gBAAgB,EAAE,IAAI",
+"sources": ["../sourcemap-sass/sourcemaps.scss"],
+"file": "sourcemaps.css"
+}
diff --git a/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css.map^headers^ b/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css.map^headers^
new file mode 100644
index 0000000000..866f3e2fb0
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css.map^headers^
@@ -0,0 +1,2 @@
+X-Content-Type-Options: nosniff
+Content-Type: text/plain
diff --git a/devtools/client/styleeditor/test/sourcemap-css/sourcemaps_chrome.css b/devtools/client/styleeditor/test/sourcemap-css/sourcemaps_chrome.css
new file mode 100644
index 0000000000..f6713bf1ea
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/sourcemaps_chrome.css
@@ -0,0 +1,7 @@
+div {
+  color: #ff0066; }
+
+span {
+  background-color: #EEE; }
+
+/*# sourceMappingURL=chrome://mochitests/content/browser/devtools/client/styleeditor/test/sourcemap-css/sourcemaps.css.map */
diff --git a/devtools/client/styleeditor/test/sourcemap-css/test-bootstrap-scss.css b/devtools/client/styleeditor/test/sourcemap-css/test-bootstrap-scss.css
new file mode 100644
index 0000000000..e943c6ef4e
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/test-bootstrap-scss.css
@@ -0,0 +1,4513 @@
+/*! normalize.css v3.0.1 | MIT License | git.io/normalize */
+html {
+  font-family: sans-serif;
+  -ms-text-size-adjust: 100%;
+  -webkit-text-size-adjust: 100%; }
+
+body {
+  margin: 0; }
+
+article, aside, details, figcaption, figure, footer, header, hgroup, main, nav, section, summary {
+  display: block; }
+
+audio, canvas, progress, video {
+  display: inline-block;
+  vertical-align: baseline; }
+
+audio:not([controls]) {
+  display: none;
+  height: 0; }
+
+[hidden], template {
+  display: none; }
+
+a {
+  background: transparent; }
+
+a:active, a:hover {
+  outline: 0; }
+
+abbr[title] {
+  border-bottom: 1px dotted; }
+
+b, strong {
+  font-weight: bold; }
+
+dfn {
+  font-style: italic; }
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0; }
+
+mark {
+  background: #ff0;
+  color: #000; }
+
+small {
+  font-size: 80%; }
+
+sub, sup {
+  font-size: 75%;
+  line-height: 0;
+  position: relative;
+  vertical-align: baseline; }
+
+sup {
+  top: -0.5em; }
+
+sub {
+  bottom: -0.25em; }
+
+img {
+  border: 0; }
+
+svg:not(:root) {
+  overflow: hidden; }
+
+figure {
+  margin: 1em 40px; }
+
+hr {
+  box-sizing: content-box;
+  height: 0; }
+
+pre {
+  overflow: auto; }
+
+code, kbd, pre, samp {
+  font-family: monospace, monospace;
+  font-size: 1em; }
+
+button, input, optgroup, select, textarea {
+  color: inherit;
+  font: inherit;
+  margin: 0; }
+
+button {
+  overflow: visible; }
+
+button, select {
+  text-transform: none; }
+
+button, html input[type="button"], input[type="reset"], input[type="submit"] {
+  -webkit-appearance: button;
+  cursor: pointer; }
+
+button[disabled], html input[disabled] {
+  cursor: default; }
+
+button::-moz-focus-inner, input::-moz-focus-inner {
+  border: 0;
+  padding: 0; }
+
+input {
+  line-height: normal; }
+
+input[type="checkbox"], input[type="radio"] {
+  box-sizing: border-box;
+  padding: 0; }
+
+input[type="number"]::-webkit-inner-spin-button, input[type="number"]::-webkit-outer-spin-button {
+  height: auto; }
+
+input[type="search"] {
+  -webkit-appearance: textfield;
+  box-sizing: content-box; }
+
+input[type="search"]::-webkit-search-cancel-button, input[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none; }
+
+fieldset {
+  border: 1px solid #c0c0c0;
+  margin: 0 2px;
+  padding: 0.35em 0.625em 0.75em; }
+
+legend {
+  border: 0;
+  padding: 0; }
+
+textarea {
+  overflow: auto; }
+
+optgroup {
+  font-weight: bold; }
+
+table {
+  border-collapse: collapse;
+  border-spacing: 0; }
+
+td, th {
+  padding: 0; }
+
+@media print {
+  * {
+    text-shadow: none !important;
+    color: #000 !important;
+    background: transparent !important;
+    box-shadow: none !important; }
+  a, a:visited {
+    text-decoration: underline; }
+  a[href]:after {
+    content: " (" attr(href) ")"; }
+  abbr[title]:after {
+    content: " (" attr(title) ")"; }
+  a[href^="javascript:"]:after, a[href^="#"]:after {
+    content: ""; }
+  pre, blockquote {
+    border: 1px solid #999;
+    page-break-inside: avoid; }
+  thead {
+    display: table-header-group; }
+  tr, img {
+    page-break-inside: avoid; }
+  img {
+    max-width: 100% !important; }
+  p, h2, h3 {
+    orphans: 3;
+    widows: 3; }
+  h2, h3 {
+    page-break-after: avoid; }
+  select {
+    background: #fff !important; }
+  .navbar {
+    display: none; }
+  .table td, .table th {
+    background-color: #fff !important; }
+  .btn > .caret, .dropup > .btn > .caret {
+    border-top-color: #000 !important; }
+  .label {
+    border: 1px solid #000; }
+  .table {
+    border-collapse: collapse !important; }
+  .table-bordered th, .table-bordered td {
+    border: 1px solid #ddd !important; } }
+
+@font-face {
+  font-family: 'Glyphicons Halflings';
+  src: url('../bower_components/bootstrap-sass-official/vendor/assets/fonts/bootstrap/glyphicons-halflings-regular.eot');
+  src: url('../bower_components/bootstrap-sass-official/vendor/assets/fonts/bootstrap/glyphicons-halflings-regular.eot?#iefix') format('embedded-opentype'), url('../bower_components/bootstrap-sass-official/vendor/assets/fonts/bootstrap/glyphicons-halflings-regular.woff') format('woff'), url('../bower_components/bootstrap-sass-official/vendor/assets/fonts/bootstrap/glyphicons-halflings-regular.ttf') format('truetype'), url('../bower_components/bootstrap-sass-official/vendor/assets/fonts/bootstrap/glyphicons-halflings-regular.svg#glyphicons_halflingsregular') format('svg'); }
+
+.glyphicon {
+  position: relative;
+  top: 1px;
+  display: inline-block;
+  font-family: 'Glyphicons Halflings';
+  font-style: normal;
+  font-weight: normal;
+  line-height: 1;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale; }
+
+.glyphicon-asterisk:before {
+  content: "\2a"; }
+
+.glyphicon-plus:before {
+  content: "\2b"; }
+
+.glyphicon-euro:before {
+  content: "\20ac"; }
+
+.glyphicon-minus:before {
+  content: "\2212"; }
+
+.glyphicon-cloud:before {
+  content: "\2601"; }
+
+.glyphicon-envelope:before {
+  content: "\2709"; }
+
+.glyphicon-pencil:before {
+  content: "\270f"; }
+
+.glyphicon-glass:before {
+  content: "\e001"; }
+
+.glyphicon-music:before {
+  content: "\e002"; }
+
+.glyphicon-search:before {
+  content: "\e003"; }
+
+.glyphicon-heart:before {
+  content: "\e005"; }
+
+.glyphicon-star:before {
+  content: "\e006"; }
+
+.glyphicon-star-empty:before {
+  content: "\e007"; }
+
+.glyphicon-user:before {
+  content: "\e008"; }
+
+.glyphicon-film:before {
+  content: "\e009"; }
+
+.glyphicon-th-large:before {
+  content: "\e010"; }
+
+.glyphicon-th:before {
+  content: "\e011"; }
+
+.glyphicon-th-list:before {
+  content: "\e012"; }
+
+.glyphicon-ok:before {
+  content: "\e013"; }
+
+.glyphicon-remove:before {
+  content: "\e014"; }
+
+.glyphicon-zoom-in:before {
+  content: "\e015"; }
+
+.glyphicon-zoom-out:before {
+  content: "\e016"; }
+
+.glyphicon-off:before {
+  content: "\e017"; }
+
+.glyphicon-signal:before {
+  content: "\e018"; }
+
+.glyphicon-cog:before {
+  content: "\e019"; }
+
+.glyphicon-trash:before {
+  content: "\e020"; }
+
+.glyphicon-home:before {
+  content: "\e021"; }
+
+.glyphicon-file:before {
+  content: "\e022"; }
+
+.glyphicon-time:before {
+  content: "\e023"; }
+
+.glyphicon-road:before {
+  content: "\e024"; }
+
+.glyphicon-download-alt:before {
+  content: "\e025"; }
+
+.glyphicon-download:before {
+  content: "\e026"; }
+
+.glyphicon-upload:before {
+  content: "\e027"; }
+
+.glyphicon-inbox:before {
+  content: "\e028"; }
+
+.glyphicon-play-circle:before {
+  content: "\e029"; }
+
+.glyphicon-repeat:before {
+  content: "\e030"; }
+
+.glyphicon-refresh:before {
+  content: "\e031"; }
+
+.glyphicon-list-alt:before {
+  content: "\e032"; }
+
+.glyphicon-lock:before {
+  content: "\e033"; }
+
+.glyphicon-flag:before {
+  content: "\e034"; }
+
+.glyphicon-headphones:before {
+  content: "\e035"; }
+
+.glyphicon-volume-off:before {
+  content: "\e036"; }
+
+.glyphicon-volume-down:before {
+  content: "\e037"; }
+
+.glyphicon-volume-up:before {
+  content: "\e038"; }
+
+.glyphicon-qrcode:before {
+  content: "\e039"; }
+
+.glyphicon-barcode:before {
+  content: "\e040"; }
+
+.glyphicon-tag:before {
+  content: "\e041"; }
+
+.glyphicon-tags:before {
+  content: "\e042"; }
+
+.glyphicon-book:before {
+  content: "\e043"; }
+
+.glyphicon-bookmark:before {
+  content: "\e044"; }
+
+.glyphicon-print:before {
+  content: "\e045"; }
+
+.glyphicon-camera:before {
+  content: "\e046"; }
+
+.glyphicon-font:before {
+  content: "\e047"; }
+
+.glyphicon-bold:before {
+  content: "\e048"; }
+
+.glyphicon-italic:before {
+  content: "\e049"; }
+
+.glyphicon-text-height:before {
+  content: "\e050"; }
+
+.glyphicon-text-width:before {
+  content: "\e051"; }
+
+.glyphicon-align-left:before {
+  content: "\e052"; }
+
+.glyphicon-align-center:before {
+  content: "\e053"; }
+
+.glyphicon-align-right:before {
+  content: "\e054"; }
+
+.glyphicon-align-justify:before {
+  content: "\e055"; }
+
+.glyphicon-list:before {
+  content: "\e056"; }
+
+.glyphicon-indent-left:before {
+  content: "\e057"; }
+
+.glyphicon-indent-right:before {
+  content: "\e058"; }
+
+.glyphicon-facetime-video:before {
+  content: "\e059"; }
+
+.glyphicon-picture:before {
+  content: "\e060"; }
+
+.glyphicon-map-marker:before {
+  content: "\e062"; }
+
+.glyphicon-adjust:before {
+  content: "\e063"; }
+
+.glyphicon-tint:before {
+  content: "\e064"; }
+
+.glyphicon-edit:before {
+  content: "\e065"; }
+
+.glyphicon-share:before {
+  content: "\e066"; }
+
+.glyphicon-check:before {
+  content: "\e067"; }
+
+.glyphicon-move:before {
+  content: "\e068"; }
+
+.glyphicon-step-backward:before {
+  content: "\e069"; }
+
+.glyphicon-fast-backward:before {
+  content: "\e070"; }
+
+.glyphicon-backward:before {
+  content: "\e071"; }
+
+.glyphicon-play:before {
+  content: "\e072"; }
+
+.glyphicon-pause:before {
+  content: "\e073"; }
+
+.glyphicon-stop:before {
+  content: "\e074"; }
+
+.glyphicon-forward:before {
+  content: "\e075"; }
+
+.glyphicon-fast-forward:before {
+  content: "\e076"; }
+
+.glyphicon-step-forward:before {
+  content: "\e077"; }
+
+.glyphicon-eject:before {
+  content: "\e078"; }
+
+.glyphicon-chevron-left:before {
+  content: "\e079"; }
+
+.glyphicon-chevron-right:before {
+  content: "\e080"; }
+
+.glyphicon-plus-sign:before {
+  content: "\e081"; }
+
+.glyphicon-minus-sign:before {
+  content: "\e082"; }
+
+.glyphicon-remove-sign:before {
+  content: "\e083"; }
+
+.glyphicon-ok-sign:before {
+  content: "\e084"; }
+
+.glyphicon-question-sign:before {
+  content: "\e085"; }
+
+.glyphicon-info-sign:before {
+  content: "\e086"; }
+
+.glyphicon-screenshot:before {
+  content: "\e087"; }
+
+.glyphicon-remove-circle:before {
+  content: "\e088"; }
+
+.glyphicon-ok-circle:before {
+  content: "\e089"; }
+
+.glyphicon-ban-circle:before {
+  content: "\e090"; }
+
+.glyphicon-arrow-left:before {
+  content: "\e091"; }
+
+.glyphicon-arrow-right:before {
+  content: "\e092"; }
+
+.glyphicon-arrow-up:before {
+  content: "\e093"; }
+
+.glyphicon-arrow-down:before {
+  content: "\e094"; }
+
+.glyphicon-share-alt:before {
+  content: "\e095"; }
+
+.glyphicon-resize-full:before {
+  content: "\e096"; }
+
+.glyphicon-resize-small:before {
+  content: "\e097"; }
+
+.glyphicon-exclamation-sign:before {
+  content: "\e101"; }
+
+.glyphicon-gift:before {
+  content: "\e102"; }
+
+.glyphicon-leaf:before {
+  content: "\e103"; }
+
+.glyphicon-fire:before {
+  content: "\e104"; }
+
+.glyphicon-eye-open:before {
+  content: "\e105"; }
+
+.glyphicon-eye-close:before {
+  content: "\e106"; }
+
+.glyphicon-warning-sign:before {
+  content: "\e107"; }
+
+.glyphicon-plane:before {
+  content: "\e108"; }
+
+.glyphicon-calendar:before {
+  content: "\e109"; }
+
+.glyphicon-random:before {
+  content: "\e110"; }
+
+.glyphicon-comment:before {
+  content: "\e111"; }
+
+.glyphicon-magnet:before {
+  content: "\e112"; }
+
+.glyphicon-chevron-up:before {
+  content: "\e113"; }
+
+.glyphicon-chevron-down:before {
+  content: "\e114"; }
+
+.glyphicon-retweet:before {
+  content: "\e115"; }
+
+.glyphicon-shopping-cart:before {
+  content: "\e116"; }
+
+.glyphicon-folder-close:before {
+  content: "\e117"; }
+
+.glyphicon-folder-open:before {
+  content: "\e118"; }
+
+.glyphicon-resize-vertical:before {
+  content: "\e119"; }
+
+.glyphicon-resize-horizontal:before {
+  content: "\e120"; }
+
+.glyphicon-hdd:before {
+  content: "\e121"; }
+
+.glyphicon-bullhorn:before {
+  content: "\e122"; }
+
+.glyphicon-bell:before {
+  content: "\e123"; }
+
+.glyphicon-certificate:before {
+  content: "\e124"; }
+
+.glyphicon-thumbs-up:before {
+  content: "\e125"; }
+
+.glyphicon-thumbs-down:before {
+  content: "\e126"; }
+
+.glyphicon-hand-right:before {
+  content: "\e127"; }
+
+.glyphicon-hand-left:before {
+  content: "\e128"; }
+
+.glyphicon-hand-up:before {
+  content: "\e129"; }
+
+.glyphicon-hand-down:before {
+  content: "\e130"; }
+
+.glyphicon-circle-arrow-right:before {
+  content: "\e131"; }
+
+.glyphicon-circle-arrow-left:before {
+  content: "\e132"; }
+
+.glyphicon-circle-arrow-up:before {
+  content: "\e133"; }
+
+.glyphicon-circle-arrow-down:before {
+  content: "\e134"; }
+
+.glyphicon-globe:before {
+  content: "\e135"; }
+
+.glyphicon-wrench:before {
+  content: "\e136"; }
+
+.glyphicon-tasks:before {
+  content: "\e137"; }
+
+.glyphicon-filter:before {
+  content: "\e138"; }
+
+.glyphicon-briefcase:before {
+  content: "\e139"; }
+
+.glyphicon-fullscreen:before {
+  content: "\e140"; }
+
+.glyphicon-dashboard:before {
+  content: "\e141"; }
+
+.glyphicon-paperclip:before {
+  content: "\e142"; }
+
+.glyphicon-heart-empty:before {
+  content: "\e143"; }
+
+.glyphicon-link:before {
+  content: "\e144"; }
+
+.glyphicon-phone:before {
+  content: "\e145"; }
+
+.glyphicon-pushpin:before {
+  content: "\e146"; }
+
+.glyphicon-usd:before {
+  content: "\e148"; }
+
+.glyphicon-gbp:before {
+  content: "\e149"; }
+
+.glyphicon-sort:before {
+  content: "\e150"; }
+
+.glyphicon-sort-by-alphabet:before {
+  content: "\e151"; }
+
+.glyphicon-sort-by-alphabet-alt:before {
+  content: "\e152"; }
+
+.glyphicon-sort-by-order:before {
+  content: "\e153"; }
+
+.glyphicon-sort-by-order-alt:before {
+  content: "\e154"; }
+
+.glyphicon-sort-by-attributes:before {
+  content: "\e155"; }
+
+.glyphicon-sort-by-attributes-alt:before {
+  content: "\e156"; }
+
+.glyphicon-unchecked:before {
+  content: "\e157"; }
+
+.glyphicon-expand:before {
+  content: "\e158"; }
+
+.glyphicon-collapse-down:before {
+  content: "\e159"; }
+
+.glyphicon-collapse-up:before {
+  content: "\e160"; }
+
+.glyphicon-log-in:before {
+  content: "\e161"; }
+
+.glyphicon-flash:before {
+  content: "\e162"; }
+
+.glyphicon-log-out:before {
+  content: "\e163"; }
+
+.glyphicon-new-window:before {
+  content: "\e164"; }
+
+.glyphicon-record:before {
+  content: "\e165"; }
+
+.glyphicon-save:before {
+  content: "\e166"; }
+
+.glyphicon-open:before {
+  content: "\e167"; }
+
+.glyphicon-saved:before {
+  content: "\e168"; }
+
+.glyphicon-import:before {
+  content: "\e169"; }
+
+.glyphicon-export:before {
+  content: "\e170"; }
+
+.glyphicon-send:before {
+  content: "\e171"; }
+
+.glyphicon-floppy-disk:before {
+  content: "\e172"; }
+
+.glyphicon-floppy-saved:before {
+  content: "\e173"; }
+
+.glyphicon-floppy-remove:before {
+  content: "\e174"; }
+
+.glyphicon-floppy-save:before {
+  content: "\e175"; }
+
+.glyphicon-floppy-open:before {
+  content: "\e176"; }
+
+.glyphicon-credit-card:before {
+  content: "\e177"; }
+
+.glyphicon-transfer:before {
+  content: "\e178"; }
+
+.glyphicon-cutlery:before {
+  content: "\e179"; }
+
+.glyphicon-header:before {
+  content: "\e180"; }
+
+.glyphicon-compressed:before {
+  content: "\e181"; }
+
+.glyphicon-earphone:before {
+  content: "\e182"; }
+
+.glyphicon-phone-alt:before {
+  content: "\e183"; }
+
+.glyphicon-tower:before {
+  content: "\e184"; }
+
+.glyphicon-stats:before {
+  content: "\e185"; }
+
+.glyphicon-sd-video:before {
+  content: "\e186"; }
+
+.glyphicon-hd-video:before {
+  content: "\e187"; }
+
+.glyphicon-subtitles:before {
+  content: "\e188"; }
+
+.glyphicon-sound-stereo:before {
+  content: "\e189"; }
+
+.glyphicon-sound-dolby:before {
+  content: "\e190"; }
+
+.glyphicon-sound-5-1:before {
+  content: "\e191"; }
+
+.glyphicon-sound-6-1:before {
+  content: "\e192"; }
+
+.glyphicon-sound-7-1:before {
+  content: "\e193"; }
+
+.glyphicon-copyright-mark:before {
+  content: "\e194"; }
+
+.glyphicon-registration-mark:before {
+  content: "\e195"; }
+
+.glyphicon-cloud-download:before {
+  content: "\e197"; }
+
+.glyphicon-cloud-upload:before {
+  content: "\e198"; }
+
+.glyphicon-tree-conifer:before {
+  content: "\e199"; }
+
+.glyphicon-tree-deciduous:before {
+  content: "\e200"; }
+
+* {
+  box-sizing: border-box; }
+
+*:before, *:after {
+  box-sizing: border-box; }
+
+html {
+  font-size: 62.5%;
+  -webkit-tap-highlight-color: rgba(0, 0, 0, 0); }
+
+body {
+  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+  font-size: 14px;
+  line-height: 1.42857;
+  color: #333333;
+  background-color: #fff; }
+
+input, button, select, textarea {
+  font-family: inherit;
+  font-size: inherit;
+  line-height: inherit; }
+
+a {
+  color: #428bca;
+  text-decoration: none; }
+  a:hover, a:focus {
+    color: #2a6596;
+    text-decoration: underline; }
+  a:focus {
+    outline: thin dotted;
+    outline: 5px auto -webkit-focus-ring-color;
+    outline-offset: -2px; }
+
+figure {
+  margin: 0; }
+
+img {
+  vertical-align: middle; }
+
+.img-responsive {
+  display: block;
+  max-width: 100%;
+  height: auto; }
+
+.img-rounded {
+  border-radius: 6px; }
+
+.img-thumbnail {
+  padding: 4px;
+  line-height: 1.42857;
+  background-color: #fff;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  transition: all 0.2s ease-in-out;
+  display: inline-block;
+  max-width: 100%;
+  height: auto; }
+
+.img-circle {
+  border-radius: 50%; }
+
+hr {
+  margin-top: 20px;
+  margin-bottom: 20px;
+  border: 0;
+  border-top: 1px solid #eeeeee; }
+
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  margin: -1px;
+  padding: 0;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  border: 0; }
+
+.sr-only-focusable:active, .sr-only-focusable:focus {
+  position: static;
+  width: auto;
+  height: auto;
+  margin: 0;
+  overflow: visible;
+  clip: auto; }
+
+h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6 {
+  font-family: inherit;
+  font-weight: 500;
+  line-height: 1.1;
+  color: inherit; }
+  h1 small, h1 .small, h2 small, h2 .small, h3 small, h3 .small, h4 small, h4 .small, h5 small, h5 .small, h6 small, h6 .small, .h1 small, .h1 .small, .h2 small, .h2 .small, .h3 small, .h3 .small, .h4 small, .h4 .small, .h5 small, .h5 .small, .h6 small, .h6 .small {
+    font-weight: normal;
+    line-height: 1;
+    color: #999999; }
+
+h1, .h1, h2, .h2, h3, .h3 {
+  margin-top: 20px;
+  margin-bottom: 10px; }
+  h1 small, h1 .small, .h1 small, .h1 .small, h2 small, h2 .small, .h2 small, .h2 .small, h3 small, h3 .small, .h3 small, .h3 .small {
+    font-size: 65%; }
+
+h4, .h4, h5, .h5, h6, .h6 {
+  margin-top: 10px;
+  margin-bottom: 10px; }
+  h4 small, h4 .small, .h4 small, .h4 .small, h5 small, h5 .small, .h5 small, .h5 .small, h6 small, h6 .small, .h6 small, .h6 .small {
+    font-size: 75%; }
+
+h1, .h1 {
+  font-size: 36px; }
+
+h2, .h2 {
+  font-size: 30px; }
+
+h3, .h3 {
+  font-size: 24px; }
+
+h4, .h4 {
+  font-size: 18px; }
+
+h5, .h5 {
+  font-size: 14px; }
+
+h6, .h6 {
+  font-size: 12px; }
+
+p {
+  margin: 0 0 10px; }
+
+.lead {
+  margin-bottom: 20px;
+  font-size: 16px;
+  font-weight: 200;
+  line-height: 1.4; }
+  @media (min-width: 768px) {
+    .lead {
+      font-size: 21px; } }
+
+small, .small {
+  font-size: 85%; }
+
+cite {
+  font-style: normal; }
+
+mark, .mark {
+  background-color: #fcf8e3;
+  padding: 0.2em; }
+
+.text-left {
+  text-align: left; }
+
+.text-right {
+  text-align: right; }
+
+.text-center {
+  text-align: center; }
+
+.text-justify {
+  text-align: justify; }
+
+.text-muted {
+  color: #999999; }
+
+.text-primary {
+  color: #428bca; }
+
+a.text-primary:hover {
+  color: #3073a9; }
+
+.text-success {
+  color: #3c763d; }
+
+a.text-success:hover {
+  color: #2b542b; }
+
+.text-info {
+  color: #31708f; }
+
+a.text-info:hover {
+  color: #245369; }
+
+.text-warning {
+  color: #8a6d3b; }
+
+a.text-warning:hover {
+  color: #66502c; }
+
+.text-danger {
+  color: #a94442; }
+
+a.text-danger:hover {
+  color: #843534; }
+
+.bg-primary {
+  color: #fff; }
+
+.bg-primary {
+  background-color: #428bca; }
+
+a.bg-primary:hover {
+  background-color: #3073a9; }
+
+.bg-success {
+  background-color: #dff0d8; }
+
+a.bg-success:hover {
+  background-color: #c1e2b3; }
+
+.bg-info {
+  background-color: #d9edf7; }
+
+a.bg-info:hover {
+  background-color: #afdaee; }
+
+.bg-warning {
+  background-color: #fcf8e3; }
+
+a.bg-warning:hover {
+  background-color: #f7ecb5; }
+
+.bg-danger {
+  background-color: #f2dede; }
+
+a.bg-danger:hover {
+  background-color: #e4b9b9; }
+
+.page-header {
+  padding-bottom: 9px;
+  margin: 40px 0 20px;
+  border-bottom: 1px solid #eeeeee; }
+
+ul, ol {
+  margin-top: 0;
+  margin-bottom: 10px; }
+  ul ul, ul ol, ol ul, ol ol {
+    margin-bottom: 0; }
+
+.list-unstyled, .list-inline {
+  padding-left: 0;
+  list-style: none; }
+
+.list-inline {
+  margin-left: -5px; }
+  .list-inline > li {
+    display: inline-block;
+    padding-left: 5px;
+    padding-right: 5px; }
+
+dl {
+  margin-top: 0;
+  margin-bottom: 20px; }
+
+dt, dd {
+  line-height: 1.42857; }
+
+dt {
+  font-weight: bold; }
+
+dd {
+  margin-left: 0; }
+
+.dl-horizontal dd:before, .dl-horizontal dd:after {
+  content: " ";
+  display: table; }
+.dl-horizontal dd:after {
+  clear: both; }
+@media (min-width: 768px) {
+  .dl-horizontal dt {
+    float: left;
+    width: 160px;
+    clear: left;
+    text-align: right;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap; }
+  .dl-horizontal dd {
+    margin-left: 180px; } }
+
+abbr[title], abbr[data-original-title] {
+  cursor: help;
+  border-bottom: 1px dotted #999999; }
+
+.initialism {
+  font-size: 90%;
+  text-transform: uppercase; }
+
+blockquote {
+  padding: 10px 20px;
+  margin: 0 0 20px;
+  font-size: 17.5px;
+  border-left: 5px solid #eeeeee; }
+  blockquote p:last-child, blockquote ul:last-child, blockquote ol:last-child {
+    margin-bottom: 0; }
+  blockquote footer, blockquote small, blockquote .small {
+    display: block;
+    font-size: 80%;
+    line-height: 1.42857;
+    color: #999999; }
+    blockquote footer:before, blockquote small:before, blockquote .small:before {
+      content: '\2014 \00A0'; }
+
+.blockquote-reverse, blockquote.pull-right {
+  padding-right: 15px;
+  padding-left: 0;
+  border-right: 5px solid #eeeeee;
+  border-left: 0;
+  text-align: right; }
+  .blockquote-reverse footer:before, .blockquote-reverse small:before, .blockquote-reverse .small:before, blockquote.pull-right footer:before, blockquote.pull-right small:before, blockquote.pull-right .small:before {
+    content: ''; }
+  .blockquote-reverse footer:after, .blockquote-reverse small:after, .blockquote-reverse .small:after, blockquote.pull-right footer:after, blockquote.pull-right small:after, blockquote.pull-right .small:after {
+    content: '\00A0 \2014'; }
+
+blockquote:before, blockquote:after {
+  content: ""; }
+
+address {
+  margin-bottom: 20px;
+  font-style: normal;
+  line-height: 1.42857; }
+
+code, kbd, pre, samp {
+  font-family: Menlo, Monaco, Consolas, "Courier New", monospace; }
+
+code {
+  padding: 2px 4px;
+  font-size: 90%;
+  color: #c7254e;
+  background-color: #f9f2f4;
+  border-radius: 4px; }
+
+kbd {
+  padding: 2px 4px;
+  font-size: 90%;
+  color: #fff;
+  background-color: #333;
+  border-radius: 3px;
+  box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.25); }
+
+pre {
+  display: block;
+  padding: 9.5px;
+  margin: 0 0 10px;
+  font-size: 13px;
+  line-height: 1.42857;
+  word-break: break-all;
+  word-wrap: break-word;
+  color: #333333;
+  background-color: #f5f5f5;
+  border: 1px solid #ccc;
+  border-radius: 4px; }
+  pre code {
+    padding: 0;
+    font-size: inherit;
+    color: inherit;
+    white-space: pre-wrap;
+    background-color: transparent;
+    border-radius: 0; }
+
+.pre-scrollable {
+  max-height: 340px;
+  overflow-y: scroll; }
+
+.container {
+  margin-right: auto;
+  margin-left: auto;
+  padding-left: 15px;
+  padding-right: 15px; }
+  .container:before, .container:after {
+    content: " ";
+    display: table; }
+  .container:after {
+    clear: both; }
+  @media (min-width: 768px) {
+    .container {
+      width: 750px; } }
+  @media (min-width: 992px) {
+    .container {
+      width: 970px; } }
+  @media (min-width: 1200px) {
+    .container {
+      width: 1170px; } }
+
+.container-fluid {
+  margin-right: auto;
+  margin-left: auto;
+  padding-left: 15px;
+  padding-right: 15px; }
+  .container-fluid:before, .container-fluid:after {
+    content: " ";
+    display: table; }
+  .container-fluid:after {
+    clear: both; }
+
+.row {
+  margin-left: -15px;
+  margin-right: -15px; }
+  .row:before, .row:after {
+    content: " ";
+    display: table; }
+  .row:after {
+    clear: both; }
+
+.col-xs-1, .col-sm-1, .col-md-1, .col-lg-1, .col-xs-2, .col-sm-2, .col-md-2, .col-lg-2, .col-xs-3, .col-sm-3, .col-md-3, .col-lg-3, .col-xs-4, .col-sm-4, .col-md-4, .col-lg-4, .col-xs-5, .col-sm-5, .col-md-5, .col-lg-5, .col-xs-6, .col-sm-6, .col-md-6, .col-lg-6, .col-xs-7, .col-sm-7, .col-md-7, .col-lg-7, .col-xs-8, .col-sm-8, .col-md-8, .col-lg-8, .col-xs-9, .col-sm-9, .col-md-9, .col-lg-9, .col-xs-10, .col-sm-10, .col-md-10, .col-lg-10, .col-xs-11, .col-sm-11, .col-md-11, .col-lg-11, .col-xs-12, .col-sm-12, .col-md-12, .col-lg-12 {
+  position: relative;
+  min-height: 1px;
+  padding-left: 15px;
+  padding-right: 15px; }
+
+.col-xs-1, .col-xs-2, .col-xs-3, .col-xs-4, .col-xs-5, .col-xs-6, .col-xs-7, .col-xs-8, .col-xs-9, .col-xs-10, .col-xs-11, .col-xs-12 {
+  float: left; }
+
+.col-xs-1 {
+  width: 8.33333%; }
+
+.col-xs-2 {
+  width: 16.66667%; }
+
+.col-xs-3 {
+  width: 25%; }
+
+.col-xs-4 {
+  width: 33.33333%; }
+
+.col-xs-5 {
+  width: 41.66667%; }
+
+.col-xs-6 {
+  width: 50%; }
+
+.col-xs-7 {
+  width: 58.33333%; }
+
+.col-xs-8 {
+  width: 66.66667%; }
+
+.col-xs-9 {
+  width: 75%; }
+
+.col-xs-10 {
+  width: 83.33333%; }
+
+.col-xs-11 {
+  width: 91.66667%; }
+
+.col-xs-12 {
+  width: 100%; }
+
+.col-xs-pull-0 {
+  right: auto; }
+
+.col-xs-pull-1 {
+  right: 8.33333%; }
+
+.col-xs-pull-2 {
+  right: 16.66667%; }
+
+.col-xs-pull-3 {
+  right: 25%; }
+
+.col-xs-pull-4 {
+  right: 33.33333%; }
+
+.col-xs-pull-5 {
+  right: 41.66667%; }
+
+.col-xs-pull-6 {
+  right: 50%; }
+
+.col-xs-pull-7 {
+  right: 58.33333%; }
+
+.col-xs-pull-8 {
+  right: 66.66667%; }
+
+.col-xs-pull-9 {
+  right: 75%; }
+
+.col-xs-pull-10 {
+  right: 83.33333%; }
+
+.col-xs-pull-11 {
+  right: 91.66667%; }
+
+.col-xs-pull-12 {
+  right: 100%; }
+
+.col-xs-push-0 {
+  left: auto; }
+
+.col-xs-push-1 {
+  left: 8.33333%; }
+
+.col-xs-push-2 {
+  left: 16.66667%; }
+
+.col-xs-push-3 {
+  left: 25%; }
+
+.col-xs-push-4 {
+  left: 33.33333%; }
+
+.col-xs-push-5 {
+  left: 41.66667%; }
+
+.col-xs-push-6 {
+  left: 50%; }
+
+.col-xs-push-7 {
+  left: 58.33333%; }
+
+.col-xs-push-8 {
+  left: 66.66667%; }
+
+.col-xs-push-9 {
+  left: 75%; }
+
+.col-xs-push-10 {
+  left: 83.33333%; }
+
+.col-xs-push-11 {
+  left: 91.66667%; }
+
+.col-xs-push-12 {
+  left: 100%; }
+
+.col-xs-offset-0 {
+  margin-left: 0%; }
+
+.col-xs-offset-1 {
+  margin-left: 8.33333%; }
+
+.col-xs-offset-2 {
+  margin-left: 16.66667%; }
+
+.col-xs-offset-3 {
+  margin-left: 25%; }
+
+.col-xs-offset-4 {
+  margin-left: 33.33333%; }
+
+.col-xs-offset-5 {
+  margin-left: 41.66667%; }
+
+.col-xs-offset-6 {
+  margin-left: 50%; }
+
+.col-xs-offset-7 {
+  margin-left: 58.33333%; }
+
+.col-xs-offset-8 {
+  margin-left: 66.66667%; }
+
+.col-xs-offset-9 {
+  margin-left: 75%; }
+
+.col-xs-offset-10 {
+  margin-left: 83.33333%; }
+
+.col-xs-offset-11 {
+  margin-left: 91.66667%; }
+
+.col-xs-offset-12 {
+  margin-left: 100%; }
+
+@media (min-width: 768px) {
+  .col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6, .col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12 {
+    float: left; }
+  .col-sm-1 {
+    width: 8.33333%; }
+  .col-sm-2 {
+    width: 16.66667%; }
+  .col-sm-3 {
+    width: 25%; }
+  .col-sm-4 {
+    width: 33.33333%; }
+  .col-sm-5 {
+    width: 41.66667%; }
+  .col-sm-6 {
+    width: 50%; }
+  .col-sm-7 {
+    width: 58.33333%; }
+  .col-sm-8 {
+    width: 66.66667%; }
+  .col-sm-9 {
+    width: 75%; }
+  .col-sm-10 {
+    width: 83.33333%; }
+  .col-sm-11 {
+    width: 91.66667%; }
+  .col-sm-12 {
+    width: 100%; }
+  .col-sm-pull-0 {
+    right: auto; }
+  .col-sm-pull-1 {
+    right: 8.33333%; }
+  .col-sm-pull-2 {
+    right: 16.66667%; }
+  .col-sm-pull-3 {
+    right: 25%; }
+  .col-sm-pull-4 {
+    right: 33.33333%; }
+  .col-sm-pull-5 {
+    right: 41.66667%; }
+  .col-sm-pull-6 {
+    right: 50%; }
+  .col-sm-pull-7 {
+    right: 58.33333%; }
+  .col-sm-pull-8 {
+    right: 66.66667%; }
+  .col-sm-pull-9 {
+    right: 75%; }
+  .col-sm-pull-10 {
+    right: 83.33333%; }
+  .col-sm-pull-11 {
+    right: 91.66667%; }
+  .col-sm-pull-12 {
+    right: 100%; }
+  .col-sm-push-0 {
+    left: auto; }
+  .col-sm-push-1 {
+    left: 8.33333%; }
+  .col-sm-push-2 {
+    left: 16.66667%; }
+  .col-sm-push-3 {
+    left: 25%; }
+  .col-sm-push-4 {
+    left: 33.33333%; }
+  .col-sm-push-5 {
+    left: 41.66667%; }
+  .col-sm-push-6 {
+    left: 50%; }
+  .col-sm-push-7 {
+    left: 58.33333%; }
+  .col-sm-push-8 {
+    left: 66.66667%; }
+  .col-sm-push-9 {
+    left: 75%; }
+  .col-sm-push-10 {
+    left: 83.33333%; }
+  .col-sm-push-11 {
+    left: 91.66667%; }
+  .col-sm-push-12 {
+    left: 100%; }
+  .col-sm-offset-0 {
+    margin-left: 0%; }
+  .col-sm-offset-1 {
+    margin-left: 8.33333%; }
+  .col-sm-offset-2 {
+    margin-left: 16.66667%; }
+  .col-sm-offset-3 {
+    margin-left: 25%; }
+  .col-sm-offset-4 {
+    margin-left: 33.33333%; }
+  .col-sm-offset-5 {
+    margin-left: 41.66667%; }
+  .col-sm-offset-6 {
+    margin-left: 50%; }
+  .col-sm-offset-7 {
+    margin-left: 58.33333%; }
+  .col-sm-offset-8 {
+    margin-left: 66.66667%; }
+  .col-sm-offset-9 {
+    margin-left: 75%; }
+  .col-sm-offset-10 {
+    margin-left: 83.33333%; }
+  .col-sm-offset-11 {
+    margin-left: 91.66667%; }
+  .col-sm-offset-12 {
+    margin-left: 100%; } }
+
+@media (min-width: 992px) {
+  .col-md-1, .col-md-2, .col-md-3, .col-md-4, .col-md-5, .col-md-6, .col-md-7, .col-md-8, .col-md-9, .col-md-10, .col-md-11, .col-md-12 {
+    float: left; }
+  .col-md-1 {
+    width: 8.33333%; }
+  .col-md-2 {
+    width: 16.66667%; }
+  .col-md-3 {
+    width: 25%; }
+  .col-md-4 {
+    width: 33.33333%; }
+  .col-md-5 {
+    width: 41.66667%; }
+  .col-md-6 {
+    width: 50%; }
+  .col-md-7 {
+    width: 58.33333%; }
+  .col-md-8 {
+    width: 66.66667%; }
+  .col-md-9 {
+    width: 75%; }
+  .col-md-10 {
+    width: 83.33333%; }
+  .col-md-11 {
+    width: 91.66667%; }
+  .col-md-12 {
+    width: 100%; }
+  .col-md-pull-0 {
+    right: auto; }
+  .col-md-pull-1 {
+    right: 8.33333%; }
+  .col-md-pull-2 {
+    right: 16.66667%; }
+  .col-md-pull-3 {
+    right: 25%; }
+  .col-md-pull-4 {
+    right: 33.33333%; }
+  .col-md-pull-5 {
+    right: 41.66667%; }
+  .col-md-pull-6 {
+    right: 50%; }
+  .col-md-pull-7 {
+    right: 58.33333%; }
+  .col-md-pull-8 {
+    right: 66.66667%; }
+  .col-md-pull-9 {
+    right: 75%; }
+  .col-md-pull-10 {
+    right: 83.33333%; }
+  .col-md-pull-11 {
+    right: 91.66667%; }
+  .col-md-pull-12 {
+    right: 100%; }
+  .col-md-push-0 {
+    left: auto; }
+  .col-md-push-1 {
+    left: 8.33333%; }
+  .col-md-push-2 {
+    left: 16.66667%; }
+  .col-md-push-3 {
+    left: 25%; }
+  .col-md-push-4 {
+    left: 33.33333%; }
+  .col-md-push-5 {
+    left: 41.66667%; }
+  .col-md-push-6 {
+    left: 50%; }
+  .col-md-push-7 {
+    left: 58.33333%; }
+  .col-md-push-8 {
+    left: 66.66667%; }
+  .col-md-push-9 {
+    left: 75%; }
+  .col-md-push-10 {
+    left: 83.33333%; }
+  .col-md-push-11 {
+    left: 91.66667%; }
+  .col-md-push-12 {
+    left: 100%; }
+  .col-md-offset-0 {
+    margin-left: 0%; }
+  .col-md-offset-1 {
+    margin-left: 8.33333%; }
+  .col-md-offset-2 {
+    margin-left: 16.66667%; }
+  .col-md-offset-3 {
+    margin-left: 25%; }
+  .col-md-offset-4 {
+    margin-left: 33.33333%; }
+  .col-md-offset-5 {
+    margin-left: 41.66667%; }
+  .col-md-offset-6 {
+    margin-left: 50%; }
+  .col-md-offset-7 {
+    margin-left: 58.33333%; }
+  .col-md-offset-8 {
+    margin-left: 66.66667%; }
+  .col-md-offset-9 {
+    margin-left: 75%; }
+  .col-md-offset-10 {
+    margin-left: 83.33333%; }
+  .col-md-offset-11 {
+    margin-left: 91.66667%; }
+  .col-md-offset-12 {
+    margin-left: 100%; } }
+
+@media (min-width: 1200px) {
+  .col-lg-1, .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6, .col-lg-7, .col-lg-8, .col-lg-9, .col-lg-10, .col-lg-11, .col-lg-12 {
+    float: left; }
+  .col-lg-1 {
+    width: 8.33333%; }
+  .col-lg-2 {
+    width: 16.66667%; }
+  .col-lg-3 {
+    width: 25%; }
+  .col-lg-4 {
+    width: 33.33333%; }
+  .col-lg-5 {
+    width: 41.66667%; }
+  .col-lg-6 {
+    width: 50%; }
+  .col-lg-7 {
+    width: 58.33333%; }
+  .col-lg-8 {
+    width: 66.66667%; }
+  .col-lg-9 {
+    width: 75%; }
+  .col-lg-10 {
+    width: 83.33333%; }
+  .col-lg-11 {
+    width: 91.66667%; }
+  .col-lg-12 {
+    width: 100%; }
+  .col-lg-pull-0 {
+    right: auto; }
+  .col-lg-pull-1 {
+    right: 8.33333%; }
+  .col-lg-pull-2 {
+    right: 16.66667%; }
+  .col-lg-pull-3 {
+    right: 25%; }
+  .col-lg-pull-4 {
+    right: 33.33333%; }
+  .col-lg-pull-5 {
+    right: 41.66667%; }
+  .col-lg-pull-6 {
+    right: 50%; }
+  .col-lg-pull-7 {
+    right: 58.33333%; }
+  .col-lg-pull-8 {
+    right: 66.66667%; }
+  .col-lg-pull-9 {
+    right: 75%; }
+  .col-lg-pull-10 {
+    right: 83.33333%; }
+  .col-lg-pull-11 {
+    right: 91.66667%; }
+  .col-lg-pull-12 {
+    right: 100%; }
+  .col-lg-push-0 {
+    left: auto; }
+  .col-lg-push-1 {
+    left: 8.33333%; }
+  .col-lg-push-2 {
+    left: 16.66667%; }
+  .col-lg-push-3 {
+    left: 25%; }
+  .col-lg-push-4 {
+    left: 33.33333%; }
+  .col-lg-push-5 {
+    left: 41.66667%; }
+  .col-lg-push-6 {
+    left: 50%; }
+  .col-lg-push-7 {
+    left: 58.33333%; }
+  .col-lg-push-8 {
+    left: 66.66667%; }
+  .col-lg-push-9 {
+    left: 75%; }
+  .col-lg-push-10 {
+    left: 83.33333%; }
+  .col-lg-push-11 {
+    left: 91.66667%; }
+  .col-lg-push-12 {
+    left: 100%; }
+  .col-lg-offset-0 {
+    margin-left: 0%; }
+  .col-lg-offset-1 {
+    margin-left: 8.33333%; }
+  .col-lg-offset-2 {
+    margin-left: 16.66667%; }
+  .col-lg-offset-3 {
+    margin-left: 25%; }
+  .col-lg-offset-4 {
+    margin-left: 33.33333%; }
+  .col-lg-offset-5 {
+    margin-left: 41.66667%; }
+  .col-lg-offset-6 {
+    margin-left: 50%; }
+  .col-lg-offset-7 {
+    margin-left: 58.33333%; }
+  .col-lg-offset-8 {
+    margin-left: 66.66667%; }
+  .col-lg-offset-9 {
+    margin-left: 75%; }
+  .col-lg-offset-10 {
+    margin-left: 83.33333%; }
+  .col-lg-offset-11 {
+    margin-left: 91.66667%; }
+  .col-lg-offset-12 {
+    margin-left: 100%; } }
+
+table {
+  max-width: 100%;
+  background-color: transparent; }
+
+th {
+  text-align: left; }
+
+.table {
+  width: 100%;
+  margin-bottom: 20px; }
+  .table > thead > tr > th, .table > thead > tr > td, .table > tbody > tr > th, .table > tbody > tr > td, .table > tfoot > tr > th, .table > tfoot > tr > td {
+    padding: 8px;
+    line-height: 1.42857;
+    vertical-align: top;
+    border-top: 1px solid #ddd; }
+  .table > thead > tr > th {
+    vertical-align: bottom;
+    border-bottom: 2px solid #ddd; }
+  .table > caption + thead > tr:first-child > th, .table > caption + thead > tr:first-child > td, .table > colgroup + thead > tr:first-child > th, .table > colgroup + thead > tr:first-child > td, .table > thead:first-child > tr:first-child > th, .table > thead:first-child > tr:first-child > td {
+    border-top: 0; }
+  .table > tbody + tbody {
+    border-top: 2px solid #ddd; }
+  .table .table {
+    background-color: #fff; }
+
+.table-condensed > thead > tr > th, .table-condensed > thead > tr > td, .table-condensed > tbody > tr > th, .table-condensed > tbody > tr > td, .table-condensed > tfoot > tr > th, .table-condensed > tfoot > tr > td {
+  padding: 5px; }
+
+.table-bordered {
+  border: 1px solid #ddd; }
+  .table-bordered > thead > tr > th, .table-bordered > thead > tr > td, .table-bordered > tbody > tr > th, .table-bordered > tbody > tr > td, .table-bordered > tfoot > tr > th, .table-bordered > tfoot > tr > td {
+    border: 1px solid #ddd; }
+  .table-bordered > thead > tr > th, .table-bordered > thead > tr > td {
+    border-bottom-width: 2px; }
+
+.table-striped > tbody > tr:nth-child(odd) > td, .table-striped > tbody > tr:nth-child(odd) > th {
+  background-color: #f9f9f9; }
+
+.table-hover > tbody > tr:hover > td, .table-hover > tbody > tr:hover > th {
+  background-color: #f5f5f5; }
+
+table col[class*="col-"] {
+  position: static;
+  float: none;
+  display: table-column; }
+
+table td[class*="col-"], table th[class*="col-"] {
+  position: static;
+  float: none;
+  display: table-cell; }
+
+.table > thead > tr > td.active, .table > thead > tr > th.active, .table > thead > tr.active > td, .table > thead > tr.active > th, .table > tbody > tr > td.active, .table > tbody > tr > th.active, .table > tbody > tr.active > td, .table > tbody > tr.active > th, .table > tfoot > tr > td.active, .table > tfoot > tr > th.active, .table > tfoot > tr.active > td, .table > tfoot > tr.active > th {
+  background-color: #f5f5f5; }
+
+.table-hover > tbody > tr > td.active:hover, .table-hover > tbody > tr > th.active:hover, .table-hover > tbody > tr.active:hover > td, .table-hover > tbody > tr:hover > .active, .table-hover > tbody > tr.active:hover > th {
+  background-color: #e8e8e8; }
+
+.table > thead > tr > td.success, .table > thead > tr > th.success, .table > thead > tr.success > td, .table > thead > tr.success > th, .table > tbody > tr > td.success, .table > tbody > tr > th.success, .table > tbody > tr.success > td, .table > tbody > tr.success > th, .table > tfoot > tr > td.success, .table > tfoot > tr > th.success, .table > tfoot > tr.success > td, .table > tfoot > tr.success > th {
+  background-color: #dff0d8; }
+
+.table-hover > tbody > tr > td.success:hover, .table-hover > tbody > tr > th.success:hover, .table-hover > tbody > tr.success:hover > td, .table-hover > tbody > tr:hover > .success, .table-hover > tbody > tr.success:hover > th {
+  background-color: #d0e9c6; }
+
+.table > thead > tr > td.info, .table > thead > tr > th.info, .table > thead > tr.info > td, .table > thead > tr.info > th, .table > tbody > tr > td.info, .table > tbody > tr > th.info, .table > tbody > tr.info > td, .table > tbody > tr.info > th, .table > tfoot > tr > td.info, .table > tfoot > tr > th.info, .table > tfoot > tr.info > td, .table > tfoot > tr.info > th {
+  background-color: #d9edf7; }
+
+.table-hover > tbody > tr > td.info:hover, .table-hover > tbody > tr > th.info:hover, .table-hover > tbody > tr.info:hover > td, .table-hover > tbody > tr:hover > .info, .table-hover > tbody > tr.info:hover > th {
+  background-color: #c4e4f3; }
+
+.table > thead > tr > td.warning, .table > thead > tr > th.warning, .table > thead > tr.warning > td, .table > thead > tr.warning > th, .table > tbody > tr > td.warning, .table > tbody > tr > th.warning, .table > tbody > tr.warning > td, .table > tbody > tr.warning > th, .table > tfoot > tr > td.warning, .table > tfoot > tr > th.warning, .table > tfoot > tr.warning > td, .table > tfoot > tr.warning > th {
+  background-color: #fcf8e3; }
+
+.table-hover > tbody > tr > td.warning:hover, .table-hover > tbody > tr > th.warning:hover, .table-hover > tbody > tr.warning:hover > td, .table-hover > tbody > tr:hover > .warning, .table-hover > tbody > tr.warning:hover > th {
+  background-color: #faf2cc; }
+
+.table > thead > tr > td.danger, .table > thead > tr > th.danger, .table > thead > tr.danger > td, .table > thead > tr.danger > th, .table > tbody > tr > td.danger, .table > tbody > tr > th.danger, .table > tbody > tr.danger > td, .table > tbody > tr.danger > th, .table > tfoot > tr > td.danger, .table > tfoot > tr > th.danger, .table > tfoot > tr.danger > td, .table > tfoot > tr.danger > th {
+  background-color: #f2dede; }
+
+.table-hover > tbody > tr > td.danger:hover, .table-hover > tbody > tr > th.danger:hover, .table-hover > tbody > tr.danger:hover > td, .table-hover > tbody > tr:hover > .danger, .table-hover > tbody > tr.danger:hover > th {
+  background-color: #ebcccc; }
+
+@media screen and (max-width: 767px) {
+  .table-responsive {
+    width: 100%;
+    margin-bottom: 15px;
+    overflow-y: hidden;
+    overflow-x: scroll;
+    -ms-overflow-style: -ms-autohiding-scrollbar;
+    border: 1px solid #ddd;
+    -webkit-overflow-scrolling: touch; }
+    .table-responsive > .table {
+      margin-bottom: 0; }
+      .table-responsive > .table > thead > tr > th, .table-responsive > .table > thead > tr > td, .table-responsive > .table > tbody > tr > th, .table-responsive > .table > tbody > tr > td, .table-responsive > .table > tfoot > tr > th, .table-responsive > .table > tfoot > tr > td {
+        white-space: nowrap; }
+    .table-responsive > .table-bordered {
+      border: 0; }
+      .table-responsive > .table-bordered > thead > tr > th:first-child, .table-responsive > .table-bordered > thead > tr > td:first-child, .table-responsive > .table-bordered > tbody > tr > th:first-child, .table-responsive > .table-bordered > tbody > tr > td:first-child, .table-responsive > .table-bordered > tfoot > tr > th:first-child, .table-responsive > .table-bordered > tfoot > tr > td:first-child {
+        border-left: 0; }
+      .table-responsive > .table-bordered > thead > tr > th:last-child, .table-responsive > .table-bordered > thead > tr > td:last-child, .table-responsive > .table-bordered > tbody > tr > th:last-child, .table-responsive > .table-bordered > tbody > tr > td:last-child, .table-responsive > .table-bordered > tfoot > tr > th:last-child, .table-responsive > .table-bordered > tfoot > tr > td:last-child {
+        border-right: 0; }
+      .table-responsive > .table-bordered > tbody > tr:last-child > th, .table-responsive > .table-bordered > tbody > tr:last-child > td, .table-responsive > .table-bordered > tfoot > tr:last-child > th, .table-responsive > .table-bordered > tfoot > tr:last-child > td {
+        border-bottom: 0; } }
+
+fieldset {
+  padding: 0;
+  margin: 0;
+  border: 0;
+  min-width: 0; }
+
+legend {
+  display: block;
+  width: 100%;
+  padding: 0;
+  margin-bottom: 20px;
+  font-size: 21px;
+  line-height: inherit;
+  color: #333333;
+  border: 0;
+  border-bottom: 1px solid #e5e5e5; }
+
+label {
+  display: inline-block;
+  max-width: 100%;
+  margin-bottom: 5px;
+  font-weight: bold; }
+
+input[type="search"] {
+  box-sizing: border-box; }
+
+input[type="radio"], input[type="checkbox"] {
+  margin: 4px 0 0;
+  margin-top: 1px \9;
+  line-height: normal; }
+
+input[type="file"] {
+  display: block; }
+
+input[type="range"] {
+  display: block;
+  width: 100%; }
+
+select[multiple], select[size] {
+  height: auto; }
+
+input[type="file"]:focus, input[type="radio"]:focus, input[type="checkbox"]:focus {
+  outline: thin dotted;
+  outline: 5px auto -webkit-focus-ring-color;
+  outline-offset: -2px; }
+
+output {
+  display: block;
+  padding-top: 7px;
+  font-size: 14px;
+  line-height: 1.42857;
+  color: #555555; }
+
+.form-control {
+  display: block;
+  width: 100%;
+  height: 34px;
+  padding: 6px 12px;
+  font-size: 14px;
+  line-height: 1.42857;
+  color: #555555;
+  background-color: #fff;
+  background-image: none;
+  border: 1px solid #ccc;
+  border-radius: 4px;
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
+  transition: border-color ease-in-out 0.15s, box-shadow ease-in-out 0.15s; }
+  .form-control:focus {
+    border-color: #66afe9;
+    outline: 0;
+    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(102, 175, 233, 0.6); }
+  .form-control::placeholder {
+    color: #999999;
+    opacity: 1; }
+  .form-control:-ms-input-placeholder {
+    color: #999999; }
+  .form-control::-webkit-input-placeholder {
+    color: #999999; }
+  .form-control[disabled], .form-control[readonly], fieldset[disabled] .form-control {
+    cursor: not-allowed;
+    background-color: #eeeeee;
+    opacity: 1; }
+
+textarea.form-control {
+  height: auto; }
+
+input[type="search"] {
+  -webkit-appearance: none; }
+
+input[type="date"], input[type="time"], input[type="datetime-local"], input[type="month"] {
+  line-height: 34px;
+  line-height: 1.42857 \0; }
+  input[type="date"].input-sm, .input-group-sm > input[type="date"].form-control, .input-group-sm > input[type="date"].input-group-addon, .input-group-sm > .input-group-btn > input[type="date"].btn, input[type="time"].input-sm, .input-group-sm > input[type="time"].form-control, .input-group-sm > input[type="time"].input-group-addon, .input-group-sm > .input-group-btn > input[type="time"].btn, input[type="datetime-local"].input-sm, .input-group-sm > input[type="datetime-local"].form-control, .input-group-sm > input[type="datetime-local"].input-group-addon, .input-group-sm > .input-group-btn > input[type="datetime-local"].btn, input[type="month"].input-sm, .input-group-sm > input[type="month"].form-control, .input-group-sm > input[type="month"].input-group-addon, .input-group-sm > .input-group-btn > input[type="month"].btn {
+    line-height: 30px; }
+  input[type="date"].input-lg, .input-group-lg > input[type="date"].form-control, .input-group-lg > input[type="date"].input-group-addon, .input-group-lg > .input-group-btn > input[type="date"].btn, input[type="time"].input-lg, .input-group-lg > input[type="time"].form-control, .input-group-lg > input[type="time"].input-group-addon, .input-group-lg > .input-group-btn > input[type="time"].btn, input[type="datetime-local"].input-lg, .input-group-lg > input[type="datetime-local"].form-control, .input-group-lg > input[type="datetime-local"].input-group-addon, .input-group-lg > .input-group-btn > input[type="datetime-local"].btn, input[type="month"].input-lg, .input-group-lg > input[type="month"].form-control, .input-group-lg > input[type="month"].input-group-addon, .input-group-lg > .input-group-btn > input[type="month"].btn {
+    line-height: 46px; }
+
+.form-group {
+  margin-bottom: 15px; }
+
+.radio, .checkbox {
+  display: block;
+  min-height: 20px;
+  margin-top: 10px;
+  margin-bottom: 10px; }
+  .radio label, .checkbox label {
+    padding-left: 20px;
+    margin-bottom: 0;
+    font-weight: normal;
+    cursor: pointer; }
+
+.radio input[type="radio"], .radio-inline input[type="radio"], .checkbox input[type="checkbox"], .checkbox-inline input[type="checkbox"] {
+  float: left;
+  margin-left: -20px; }
+
+.radio + .radio, .checkbox + .checkbox {
+  margin-top: -5px; }
+
+.radio-inline, .checkbox-inline {
+  display: inline-block;
+  padding-left: 20px;
+  margin-bottom: 0;
+  vertical-align: middle;
+  font-weight: normal;
+  cursor: pointer; }
+
+.radio-inline + .radio-inline, .checkbox-inline + .checkbox-inline {
+  margin-top: 0;
+  margin-left: 10px; }
+
+input[type="radio"][disabled], fieldset[disabled] input[type="radio"], input[type="checkbox"][disabled], fieldset[disabled] input[type="checkbox"], .radio[disabled], fieldset[disabled] .radio, .radio-inline[disabled], fieldset[disabled] .radio-inline, .checkbox[disabled], fieldset[disabled] .checkbox, .checkbox-inline[disabled], fieldset[disabled] .checkbox-inline {
+  cursor: not-allowed; }
+
+.input-sm, .input-group-sm > .form-control, .input-group-sm > .input-group-addon, .input-group-sm > .input-group-btn > .btn {
+  height: 30px;
+  padding: 5px 10px;
+  font-size: 12px;
+  line-height: 1.5;
+  border-radius: 3px; }
+
+select.input-sm, .input-group-sm > select.form-control, .input-group-sm > select.input-group-addon, .input-group-sm > .input-group-btn > select.btn {
+  height: 30px;
+  line-height: 30px; }
+
+textarea.input-sm, .input-group-sm > textarea.form-control, .input-group-sm > textarea.input-group-addon, .input-group-sm > .input-group-btn > textarea.btn, select[multiple].input-sm, .input-group-sm > select[multiple].form-control, .input-group-sm > select[multiple].input-group-addon, .input-group-sm > .input-group-btn > select[multiple].btn {
+  height: auto; }
+
+.input-lg, .input-group-lg > .form-control, .input-group-lg > .input-group-addon, .input-group-lg > .input-group-btn > .btn {
+  height: 46px;
+  padding: 10px 16px;
+  font-size: 18px;
+  line-height: 1.33;
+  border-radius: 6px; }
+
+select.input-lg, .input-group-lg > select.form-control, .input-group-lg > select.input-group-addon, .input-group-lg > .input-group-btn > select.btn {
+  height: 46px;
+  line-height: 46px; }
+
+textarea.input-lg, .input-group-lg > textarea.form-control, .input-group-lg > textarea.input-group-addon, .input-group-lg > .input-group-btn > textarea.btn, select[multiple].input-lg, .input-group-lg > select[multiple].form-control, .input-group-lg > select[multiple].input-group-addon, .input-group-lg > .input-group-btn > select[multiple].btn {
+  height: auto; }
+
+.has-feedback {
+  position: relative; }
+  .has-feedback .form-control {
+    padding-right: 42.5px; }
+
+.form-control-feedback {
+  position: absolute;
+  top: 25px;
+  right: 0;
+  z-index: 2;
+  display: block;
+  width: 34px;
+  height: 34px;
+  line-height: 34px;
+  text-align: center; }
+
+.input-lg + .form-control-feedback, .input-lg + .input-group-lg > .form-control, .input-group-lg > .input-lg + .form-control, .input-lg + .input-group-lg > .input-group-addon, .input-group-lg > .input-lg + .input-group-addon, .input-lg + .input-group-lg > .input-group-btn > .btn, .input-group-lg > .input-group-btn > .input-lg + .btn {
+  width: 46px;
+  height: 46px;
+  line-height: 46px; }
+
+.input-sm + .form-control-feedback, .input-sm + .input-group-sm > .form-control, .input-group-sm > .input-sm + .form-control, .input-sm + .input-group-sm > .input-group-addon, .input-group-sm > .input-sm + .input-group-addon, .input-sm + .input-group-sm > .input-group-btn > .btn, .input-group-sm > .input-group-btn > .input-sm + .btn {
+  width: 30px;
+  height: 30px;
+  line-height: 30px; }
+
+.has-success .help-block, .has-success .control-label, .has-success .radio, .has-success .checkbox, .has-success .radio-inline, .has-success .checkbox-inline {
+  color: #3c763d; }
+.has-success .form-control {
+  border-color: #3c763d;
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075); }
+  .has-success .form-control:focus {
+    border-color: #2b542b;
+    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 6px #67b168; }
+.has-success .input-group-addon {
+  color: #3c763d;
+  border-color: #3c763d;
+  background-color: #dff0d8; }
+.has-success .form-control-feedback {
+  color: #3c763d; }
+
+.has-warning .help-block, .has-warning .control-label, .has-warning .radio, .has-warning .checkbox, .has-warning .radio-inline, .has-warning .checkbox-inline {
+  color: #8a6d3b; }
+.has-warning .form-control {
+  border-color: #8a6d3b;
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075); }
+  .has-warning .form-control:focus {
+    border-color: #66502c;
+    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 6px #c09f6b; }
+.has-warning .input-group-addon {
+  color: #8a6d3b;
+  border-color: #8a6d3b;
+  background-color: #fcf8e3; }
+.has-warning .form-control-feedback {
+  color: #8a6d3b; }
+
+.has-error .help-block, .has-error .control-label, .has-error .radio, .has-error .checkbox, .has-error .radio-inline, .has-error .checkbox-inline {
+  color: #a94442; }
+.has-error .form-control {
+  border-color: #a94442;
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075); }
+  .has-error .form-control:focus {
+    border-color: #843534;
+    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 6px #ce8483; }
+.has-error .input-group-addon {
+  color: #a94442;
+  border-color: #a94442;
+  background-color: #f2dede; }
+.has-error .form-control-feedback {
+  color: #a94442; }
+
+.form-control-static {
+  margin-bottom: 0; }
+
+.help-block {
+  display: block;
+  margin-top: 5px;
+  margin-bottom: 10px;
+  color: #737373; }
+
+@media (min-width: 768px) {
+  .form-inline .form-group, .form-inline .navbar-form {
+    display: inline-block;
+    margin-bottom: 0;
+    vertical-align: middle; }
+  .form-inline .form-control, .form-inline .navbar-form {
+    display: inline-block;
+    width: auto;
+    vertical-align: middle; }
+  .form-inline .input-group, .form-inline .navbar-form {
+    display: inline-table;
+    vertical-align: middle; }
+    .form-inline .input-group .input-group-addon, .form-inline .input-group .navbar-form, .form-inline .input-group .input-group-btn, .form-inline .input-group .navbar-form, .form-inline .input-group .form-control, .form-inline .input-group .navbar-form {
+      width: auto; }
+  .form-inline .input-group > .form-control, .form-inline .input-group > .navbar-form {
+    width: 100%; }
+  .form-inline .control-label, .form-inline .navbar-form {
+    margin-bottom: 0;
+    vertical-align: middle; }
+  .form-inline .radio, .form-inline .navbar-form, .form-inline .checkbox, .form-inline .navbar-form {
+    display: inline-block;
+    margin-top: 0;
+    margin-bottom: 0;
+    padding-left: 0;
+    vertical-align: middle; }
+  .form-inline .radio input[type="radio"], .form-inline .radio .navbar-form, .form-inline .checkbox input[type="checkbox"], .form-inline .checkbox .navbar-form {
+    float: none;
+    margin-left: 0; }
+  .form-inline .has-feedback .form-control-feedback, .form-inline .has-feedback .navbar-form {
+    top: 0; } }
+
+.form-horizontal .radio, .form-horizontal .checkbox, .form-horizontal .radio-inline, .form-horizontal .checkbox-inline {
+  margin-top: 0;
+  margin-bottom: 0;
+  padding-top: 7px; }
+.form-horizontal .radio, .form-horizontal .checkbox {
+  min-height: 27px; }
+.form-horizontal .form-group {
+  margin-left: -15px;
+  margin-right: -15px; }
+  .form-horizontal .form-group:before, .form-horizontal .form-group:after {
+    content: " ";
+    display: table; }
+  .form-horizontal .form-group:after {
+    clear: both; }
+.form-horizontal .form-control-static {
+  padding-top: 7px;
+  padding-bottom: 7px; }
+@media (min-width: 768px) {
+  .form-horizontal .control-label {
+    text-align: right;
+    margin-bottom: 0;
+    padding-top: 7px; } }
+.form-horizontal .has-feedback .form-control-feedback {
+  top: 0;
+  right: 15px; }
+
+.btn {
+  display: inline-block;
+  margin-bottom: 0;
+  font-weight: normal;
+  text-align: center;
+  vertical-align: middle;
+  cursor: pointer;
+  background-image: none;
+  border: 1px solid transparent;
+  white-space: nowrap;
+  padding: 6px 12px;
+  font-size: 14px;
+  line-height: 1.42857;
+  border-radius: 4px;
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none; }
+  .btn:focus, .btn:active:focus, .btn.active:focus {
+    outline: thin dotted;
+    outline: 5px auto -webkit-focus-ring-color;
+    outline-offset: -2px; }
+  .btn:hover, .btn:focus {
+    color: #333;
+    text-decoration: none; }
+  .btn:active, .btn.active {
+    outline: 0;
+    background-image: none;
+    box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125); }
+  .btn.disabled, .btn[disabled], fieldset[disabled] .btn {
+    cursor: not-allowed;
+    pointer-events: none;
+    opacity: 0.65;
+    filter: alpha(opacity=65);
+    box-shadow: none; }
+
+.btn-default {
+  color: #333;
+  background-color: #fff;
+  border-color: #ccc; }
+  .btn-default:hover, .btn-default:focus, .btn-default:active, .btn-default.active, .open > .btn-default.dropdown-toggle {
+    color: #333;
+    background-color: #e6e6e6;
+    border-color: #adadad; }
+  .btn-default:active, .btn-default.active, .open > .btn-default.dropdown-toggle {
+    background-image: none; }
+  .btn-default.disabled, .btn-default.disabled:hover, .btn-default.disabled:focus, .btn-default.disabled:active, .btn-default.disabled.active, .btn-default[disabled], .btn-default[disabled]:hover, .btn-default[disabled]:focus, .btn-default[disabled]:active, .btn-default[disabled].active, fieldset[disabled] .btn-default, fieldset[disabled] .btn-default:hover, fieldset[disabled] .btn-default:focus, fieldset[disabled] .btn-default:active, fieldset[disabled] .btn-default.active {
+    background-color: #fff;
+    border-color: #ccc; }
+  .btn-default .badge {
+    color: #fff;
+    background-color: #333; }
+
+.btn-primary {
+  color: #fff;
+  background-color: #428bca;
+  border-color: #3580bd; }
+  .btn-primary:hover, .btn-primary:focus, .btn-primary:active, .btn-primary.active, .open > .btn-primary.dropdown-toggle {
+    color: #fff;
+    background-color: #3073a9;
+    border-color: #28608e; }
+  .btn-primary:active, .btn-primary.active, .open > .btn-primary.dropdown-toggle {
+    background-image: none; }
+  .btn-primary.disabled, .btn-primary.disabled:hover, .btn-primary.disabled:focus, .btn-primary.disabled:active, .btn-primary.disabled.active, .btn-primary[disabled], .btn-primary[disabled]:hover, .btn-primary[disabled]:focus, .btn-primary[disabled]:active, .btn-primary[disabled].active, fieldset[disabled] .btn-primary, fieldset[disabled] .btn-primary:hover, fieldset[disabled] .btn-primary:focus, fieldset[disabled] .btn-primary:active, fieldset[disabled] .btn-primary.active {
+    background-color: #428bca;
+    border-color: #3580bd; }
+  .btn-primary .badge {
+    color: #428bca;
+    background-color: #fff; }
+
+.btn-success {
+  color: #fff;
+  background-color: #5cb85c;
+  border-color: #4eae4c; }
+  .btn-success:hover, .btn-success:focus, .btn-success:active, .btn-success.active, .open > .btn-success.dropdown-toggle {
+    color: #fff;
+    background-color: #469d44;
+    border-color: #3b8439; }
+  .btn-success:active, .btn-success.active, .open > .btn-success.dropdown-toggle {
+    background-image: none; }
+  .btn-success.disabled, .btn-success.disabled:hover, .btn-success.disabled:focus, .btn-success.disabled:active, .btn-success.disabled.active, .btn-success[disabled], .btn-success[disabled]:hover, .btn-success[disabled]:focus, .btn-success[disabled]:active, .btn-success[disabled].active, fieldset[disabled] .btn-success, fieldset[disabled] .btn-success:hover, fieldset[disabled] .btn-success:focus, fieldset[disabled] .btn-success:active, fieldset[disabled] .btn-success.active {
+    background-color: #5cb85c;
+    border-color: #4eae4c; }
+  .btn-success .badge {
+    color: #5cb85c;
+    background-color: #fff; }
+
+.btn-info {
+  color: #fff;
+  background-color: #5bc0de;
+  border-color: #46bada; }
+  .btn-info:hover, .btn-info:focus, .btn-info:active, .btn-info.active, .open > .btn-info.dropdown-toggle {
+    color: #fff;
+    background-color: #31b2d5;
+    border-color: #269cbc; }
+  .btn-info:active, .btn-info.active, .open > .btn-info.dropdown-toggle {
+    background-image: none; }
+  .btn-info.disabled, .btn-info.disabled:hover, .btn-info.disabled:focus, .btn-info.disabled:active, .btn-info.disabled.active, .btn-info[disabled], .btn-info[disabled]:hover, .btn-info[disabled]:focus, .btn-info[disabled]:active, .btn-info[disabled].active, fieldset[disabled] .btn-info, fieldset[disabled] .btn-info:hover, fieldset[disabled] .btn-info:focus, fieldset[disabled] .btn-info:active, fieldset[disabled] .btn-info.active {
+    background-color: #5bc0de;
+    border-color: #46bada; }
+  .btn-info .badge {
+    color: #5bc0de;
+    background-color: #fff; }
+
+.btn-warning {
+  color: #fff;
+  background-color: #f0ad4e;
+  border-color: #eea236; }
+  .btn-warning:hover, .btn-warning:focus, .btn-warning:active, .btn-warning.active, .open > .btn-warning.dropdown-toggle {
+    color: #fff;
+    background-color: #ec971f;
+    border-color: #d58112; }
+  .btn-warning:active, .btn-warning.active, .open > .btn-warning.dropdown-toggle {
+    background-image: none; }
+  .btn-warning.disabled, .btn-warning.disabled:hover, .btn-warning.disabled:focus, .btn-warning.disabled:active, .btn-warning.disabled.active, .btn-warning[disabled], .btn-warning[disabled]:hover, .btn-warning[disabled]:focus, .btn-warning[disabled]:active, .btn-warning[disabled].active, fieldset[disabled] .btn-warning, fieldset[disabled] .btn-warning:hover, fieldset[disabled] .btn-warning:focus, fieldset[disabled] .btn-warning:active, fieldset[disabled] .btn-warning.active {
+    background-color: #f0ad4e;
+    border-color: #eea236; }
+  .btn-warning .badge {
+    color: #f0ad4e;
+    background-color: #fff; }
+
+.btn-danger {
+  color: #fff;
+  background-color: #d9534f;
+  border-color: #d43d3a; }
+  .btn-danger:hover, .btn-danger:focus, .btn-danger:active, .btn-danger.active, .open > .btn-danger.dropdown-toggle {
+    color: #fff;
+    background-color: #c92e2c;
+    border-color: #ac2525; }
+  .btn-danger:active, .btn-danger.active, .open > .btn-danger.dropdown-toggle {
+    background-image: none; }
+  .btn-danger.disabled, .btn-danger.disabled:hover, .btn-danger.disabled:focus, .btn-danger.disabled:active, .btn-danger.disabled.active, .btn-danger[disabled], .btn-danger[disabled]:hover, .btn-danger[disabled]:focus, .btn-danger[disabled]:active, .btn-danger[disabled].active, fieldset[disabled] .btn-danger, fieldset[disabled] .btn-danger:hover, fieldset[disabled] .btn-danger:focus, fieldset[disabled] .btn-danger:active, fieldset[disabled] .btn-danger.active {
+    background-color: #d9534f;
+    border-color: #d43d3a; }
+  .btn-danger .badge {
+    color: #d9534f;
+    background-color: #fff; }
+
+.btn-link {
+  color: #428bca;
+  font-weight: normal;
+  cursor: pointer;
+  border-radius: 0; }
+  .btn-link, .btn-link:active, .btn-link[disabled], fieldset[disabled] .btn-link {
+    background-color: transparent;
+    box-shadow: none; }
+  .btn-link, .btn-link:hover, .btn-link:focus, .btn-link:active {
+    border-color: transparent; }
+  .btn-link:hover, .btn-link:focus {
+    color: #2a6596;
+    text-decoration: underline;
+    background-color: transparent; }
+  .btn-link[disabled]:hover, .btn-link[disabled]:focus, fieldset[disabled] .btn-link:hover, fieldset[disabled] .btn-link:focus {
+    color: #999999;
+    text-decoration: none; }
+
+.btn-lg, .btn-group-lg > .btn {
+  padding: 10px 16px;
+  font-size: 18px;
+  line-height: 1.33;
+  border-radius: 6px; }
+
+.btn-sm, .btn-group-sm > .btn {
+  padding: 5px 10px;
+  font-size: 12px;
+  line-height: 1.5;
+  border-radius: 3px; }
+
+.btn-xs, .btn-group-xs > .btn {
+  padding: 1px 5px;
+  font-size: 12px;
+  line-height: 1.5;
+  border-radius: 3px; }
+
+.btn-block {
+  display: block;
+  width: 100%;
+  padding-left: 0;
+  padding-right: 0; }
+
+.btn-block + .btn-block {
+  margin-top: 5px; }
+
+input[type="submit"].btn-block, input[type="reset"].btn-block, input[type="button"].btn-block {
+  width: 100%; }
+
+.fade {
+  opacity: 0;
+  transition: opacity 0.15s linear; }
+  .fade.in {
+    opacity: 1; }
+
+.collapse {
+  display: none; }
+  .collapse.in {
+    display: block; }
+
+tr.collapse.in {
+  display: table-row; }
+
+tbody.collapse.in {
+  display: table-row-group; }
+
+.collapsing {
+  position: relative;
+  height: 0;
+  overflow: hidden;
+  transition: height 0.35s ease; }
+
+.caret {
+  display: inline-block;
+  width: 0;
+  height: 0;
+  margin-left: 2px;
+  vertical-align: middle;
+  border-top: 4px solid;
+  border-right: 4px solid transparent;
+  border-left: 4px solid transparent; }
+
+.dropdown {
+  position: relative; }
+
+.dropdown-toggle:focus {
+  outline: 0; }
+
+.dropdown-menu {
+  position: absolute;
+  top: 100%;
+  left: 0;
+  z-index: 1000;
+  display: none;
+  float: left;
+  min-width: 160px;
+  padding: 5px 0;
+  margin: 2px 0 0;
+  list-style: none;
+  font-size: 14px;
+  text-align: left;
+  background-color: #fff;
+  border: 1px solid #ccc;
+  border: 1px solid rgba(0, 0, 0, 0.15);
+  border-radius: 4px;
+  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.175);
+  background-clip: padding-box; }
+  .dropdown-menu.pull-right {
+    right: 0;
+    left: auto; }
+  .dropdown-menu .divider {
+    height: 1px;
+    margin: 9px 0;
+    overflow: hidden;
+    background-color: #e5e5e5; }
+  .dropdown-menu > li > a {
+    display: block;
+    padding: 3px 20px;
+    clear: both;
+    font-weight: normal;
+    line-height: 1.42857;
+    color: #333333;
+    white-space: nowrap; }
+
+.dropdown-menu > li > a:hover, .dropdown-menu > li > a:focus {
+  text-decoration: none;
+  color: #262626;
+  background-color: #f5f5f5; }
+
+.dropdown-menu > .active > a, .dropdown-menu > .active > a:hover, .dropdown-menu > .active > a:focus {
+  color: #fff;
+  text-decoration: none;
+  outline: 0;
+  background-color: #428bca; }
+
+.dropdown-menu > .disabled > a, .dropdown-menu > .disabled > a:hover, .dropdown-menu > .disabled > a:focus {
+  color: #999999; }
+
+.dropdown-menu > .disabled > a:hover, .dropdown-menu > .disabled > a:focus {
+  text-decoration: none;
+  background-color: transparent;
+  background-image: none;
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  cursor: not-allowed; }
+
+.open > .dropdown-menu {
+  display: block; }
+.open > a {
+  outline: 0; }
+
+.dropdown-menu-right {
+  left: auto;
+  right: 0; }
+
+.dropdown-menu-left {
+  left: 0;
+  right: auto; }
+
+.dropdown-header {
+  display: block;
+  padding: 3px 20px;
+  font-size: 12px;
+  line-height: 1.42857;
+  color: #999999; }
+
+.dropdown-backdrop {
+  position: fixed;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  top: 0;
+  z-index: 990; }
+
+.pull-right > .dropdown-menu {
+  right: 0;
+  left: auto; }
+
+.dropup .caret, .navbar-fixed-bottom .dropdown .caret {
+  border-top: 0;
+  border-bottom: 4px solid;
+  content: ""; }
+.dropup .dropdown-menu, .navbar-fixed-bottom .dropdown .dropdown-menu {
+  top: auto;
+  bottom: 100%;
+  margin-bottom: 1px; }
+
+@media (min-width: 768px) {
+  .navbar-right .dropdown-menu {
+    right: 0;
+    left: auto; }
+  .navbar-right .dropdown-menu-left {
+    left: 0;
+    right: auto; } }
+
+.btn-group, .btn-group-vertical {
+  position: relative;
+  display: inline-block;
+  vertical-align: middle; }
+  .btn-group > .btn, .btn-group-vertical > .btn {
+    position: relative;
+    float: left; }
+    .btn-group > .btn:hover, .btn-group > .btn:focus, .btn-group > .btn:active, .btn-group > .btn.active, .btn-group-vertical > .btn:hover, .btn-group-vertical > .btn:focus, .btn-group-vertical > .btn:active, .btn-group-vertical > .btn.active {
+      z-index: 2; }
+    .btn-group > .btn:focus, .btn-group-vertical > .btn:focus {
+      outline: 0; }
+
+.btn-group .btn + .btn, .btn-group .btn + .btn-group, .btn-group .btn-group + .btn, .btn-group .btn-group + .btn-group {
+  margin-left: -1px; }
+
+.btn-toolbar {
+  margin-left: -5px; }
+  .btn-toolbar:before, .btn-toolbar:after {
+    content: " ";
+    display: table; }
+  .btn-toolbar:after {
+    clear: both; }
+  .btn-toolbar .btn-group, .btn-toolbar .input-group {
+    float: left; }
+  .btn-toolbar > .btn, .btn-toolbar > .btn-group, .btn-toolbar > .input-group {
+    margin-left: 5px; }
+
+.btn-group > .btn:not(:first-child):not(:last-child):not(.dropdown-toggle) {
+  border-radius: 0; }
+
+.btn-group > .btn:first-child {
+  margin-left: 0; }
+  .btn-group > .btn:first-child:not(:last-child):not(.dropdown-toggle) {
+    border-bottom-right-radius: 0;
+    border-top-right-radius: 0; }
+
+.btn-group > .btn:last-child:not(:first-child), .btn-group > .dropdown-toggle:not(:first-child) {
+  border-bottom-left-radius: 0;
+  border-top-left-radius: 0; }
+
+.btn-group > .btn-group {
+  float: left; }
+
+.btn-group > .btn-group:not(:first-child):not(:last-child) > .btn {
+  border-radius: 0; }
+
+.btn-group > .btn-group:first-child > .btn:last-child, .btn-group > .btn-group:first-child > .dropdown-toggle {
+  border-bottom-right-radius: 0;
+  border-top-right-radius: 0; }
+
+.btn-group > .btn-group:last-child > .btn:first-child {
+  border-bottom-left-radius: 0;
+  border-top-left-radius: 0; }
+
+.btn-group .dropdown-toggle:active, .btn-group.open .dropdown-toggle {
+  outline: 0; }
+
+.btn-group > .btn + .dropdown-toggle {
+  padding-left: 8px;
+  padding-right: 8px; }
+
+.btn-group > .btn-lg + .dropdown-toggle, .btn-group > .btn-lg + .btn-group-lg > .btn, .btn-group-lg > .btn-group > .btn-lg + .btn {
+  padding-left: 12px;
+  padding-right: 12px; }
+
+.btn-group.open .dropdown-toggle {
+  box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125); }
+  .btn-group.open .dropdown-toggle.btn-link {
+    box-shadow: none; }
+
+.btn .caret {
+  margin-left: 0; }
+
+.btn-lg .caret, .btn-lg .btn-group-lg > .btn, .btn-group-lg > .btn-lg .btn {
+  border-width: 5px 5px 0;
+  border-bottom-width: 0; }
+
+.dropup .btn-lg .caret, .dropup .btn-lg .btn-group-lg > .btn, .btn-group-lg > .dropup .btn-lg .btn {
+  border-width: 0 5px 5px; }
+
+.btn-group-vertical > .btn, .btn-group-vertical > .btn-group, .btn-group-vertical > .btn-group > .btn {
+  display: block;
+  float: none;
+  width: 100%;
+  max-width: 100%; }
+.btn-group-vertical > .btn-group:before, .btn-group-vertical > .btn-group:after {
+  content: " ";
+  display: table; }
+.btn-group-vertical > .btn-group:after {
+  clear: both; }
+.btn-group-vertical > .btn-group > .btn {
+  float: none; }
+.btn-group-vertical > .btn + .btn, .btn-group-vertical > .btn + .btn-group, .btn-group-vertical > .btn-group + .btn, .btn-group-vertical > .btn-group + .btn-group {
+  margin-top: -1px;
+  margin-left: 0; }
+
+.btn-group-vertical > .btn:not(:first-child):not(:last-child) {
+  border-radius: 0; }
+.btn-group-vertical > .btn:first-child:not(:last-child) {
+  border-top-right-radius: 4px;
+  border-bottom-right-radius: 0;
+  border-bottom-left-radius: 0; }
+.btn-group-vertical > .btn:last-child:not(:first-child) {
+  border-bottom-left-radius: 4px;
+  border-top-right-radius: 0;
+  border-top-left-radius: 0; }
+
+.btn-group-vertical > .btn-group:not(:first-child):not(:last-child) > .btn {
+  border-radius: 0; }
+
+.btn-group-vertical > .btn-group:first-child:not(:last-child) > .btn:last-child, .btn-group-vertical > .btn-group:first-child:not(:last-child) > .dropdown-toggle {
+  border-bottom-right-radius: 0;
+  border-bottom-left-radius: 0; }
+
+.btn-group-vertical > .btn-group:last-child:not(:first-child) > .btn:first-child {
+  border-top-right-radius: 0;
+  border-top-left-radius: 0; }
+
+.btn-group-justified {
+  display: table;
+  width: 100%;
+  table-layout: fixed;
+  border-collapse: separate; }
+  .btn-group-justified > .btn, .btn-group-justified > .btn-group {
+    float: none;
+    display: table-cell;
+    width: 1%; }
+  .btn-group-justified > .btn-group .btn {
+    width: 100%; }
+
+[data-toggle="buttons"] > .btn > input[type="radio"], [data-toggle="buttons"] > .btn > input[type="checkbox"] {
+  position: absolute;
+  z-index: -1;
+  opacity: 0; }
+
+.input-group {
+  position: relative;
+  display: table;
+  border-collapse: separate; }
+  .input-group[class*="col-"] {
+    float: none;
+    padding-left: 0;
+    padding-right: 0; }
+  .input-group .form-control {
+    position: relative;
+    z-index: 2;
+    float: left;
+    width: 100%;
+    margin-bottom: 0; }
+
+.input-group-addon, .input-group-btn, .input-group .form-control {
+  display: table-cell; }
+  .input-group-addon:not(:first-child):not(:last-child), .input-group-btn:not(:first-child):not(:last-child), .input-group .form-control:not(:first-child):not(:last-child) {
+    border-radius: 0; }
+
+.input-group-addon, .input-group-btn {
+  width: 1%;
+  white-space: nowrap;
+  vertical-align: middle; }
+
+.input-group-addon {
+  padding: 6px 12px;
+  font-size: 14px;
+  font-weight: normal;
+  line-height: 1;
+  color: #555555;
+  text-align: center;
+  background-color: #eeeeee;
+  border: 1px solid #ccc;
+  border-radius: 4px; }
+  .input-group-addon.input-sm, .input-group-sm > .input-group-addon.form-control, .input-group-sm > .input-group-addon, .input-group-sm > .input-group-btn > .input-group-addon.btn {
+    padding: 5px 10px;
+    font-size: 12px;
+    border-radius: 3px; }
+  .input-group-addon.input-lg, .input-group-lg > .input-group-addon.form-control, .input-group-lg > .input-group-addon, .input-group-lg > .input-group-btn > .input-group-addon.btn {
+    padding: 10px 16px;
+    font-size: 18px;
+    border-radius: 6px; }
+  .input-group-addon input[type="radio"], .input-group-addon input[type="checkbox"] {
+    margin-top: 0; }
+
+.input-group .form-control:first-child, .input-group-addon:first-child, .input-group-btn:first-child > .btn, .input-group-btn:first-child > .btn-group > .btn, .input-group-btn:first-child > .dropdown-toggle, .input-group-btn:last-child > .btn:not(:last-child):not(.dropdown-toggle), .input-group-btn:last-child > .btn-group:not(:last-child) > .btn {
+  border-bottom-right-radius: 0;
+  border-top-right-radius: 0; }
+
+.input-group-addon:first-child {
+  border-right: 0; }
+
+.input-group .form-control:last-child, .input-group-addon:last-child, .input-group-btn:last-child > .btn, .input-group-btn:last-child > .btn-group > .btn, .input-group-btn:last-child > .dropdown-toggle, .input-group-btn:first-child > .btn:not(:first-child), .input-group-btn:first-child > .btn-group:not(:first-child) > .btn {
+  border-bottom-left-radius: 0;
+  border-top-left-radius: 0; }
+
+.input-group-addon:last-child {
+  border-left: 0; }
+
+.input-group-btn {
+  position: relative;
+  font-size: 0;
+  white-space: nowrap; }
+  .input-group-btn > .btn {
+    position: relative; }
+    .input-group-btn > .btn + .btn {
+      margin-left: -1px; }
+    .input-group-btn > .btn:hover, .input-group-btn > .btn:focus, .input-group-btn > .btn:active {
+      z-index: 2; }
+  .input-group-btn:first-child > .btn, .input-group-btn:first-child > .btn-group {
+    margin-right: -1px; }
+  .input-group-btn:last-child > .btn, .input-group-btn:last-child > .btn-group {
+    margin-left: -1px; }
+
+.nav {
+  margin-bottom: 0;
+  padding-left: 0;
+  list-style: none; }
+  .nav:before, .nav:after {
+    content: " ";
+    display: table; }
+  .nav:after {
+    clear: both; }
+  .nav > li {
+    position: relative;
+    display: block; }
+    .nav > li > a {
+      position: relative;
+      display: block;
+      padding: 10px 15px; }
+      .nav > li > a:hover, .nav > li > a:focus {
+        text-decoration: none;
+        background-color: #eeeeee; }
+    .nav > li.disabled > a {
+      color: #999999; }
+      .nav > li.disabled > a:hover, .nav > li.disabled > a:focus {
+        color: #999999;
+        text-decoration: none;
+        background-color: transparent;
+        cursor: not-allowed; }
+  .nav .open > a, .nav .open > a:hover, .nav .open > a:focus {
+    background-color: #eeeeee;
+    border-color: #428bca; }
+  .nav .nav-divider {
+    height: 1px;
+    margin: 9px 0;
+    overflow: hidden;
+    background-color: #e5e5e5; }
+  .nav > li > a > img {
+    max-width: none; }
+
+.nav-tabs {
+  border-bottom: 1px solid #ddd; }
+  .nav-tabs > li {
+    float: left;
+    margin-bottom: -1px; }
+    .nav-tabs > li > a {
+      margin-right: 2px;
+      line-height: 1.42857;
+      border: 1px solid transparent;
+      border-radius: 4px 4px 0 0; }
+      .nav-tabs > li > a:hover {
+        border-color: #eeeeee #eeeeee #ddd; }
+    .nav-tabs > li.active > a, .nav-tabs > li.active > a:hover, .nav-tabs > li.active > a:focus {
+      color: #555555;
+      background-color: #fff;
+      border: 1px solid #ddd;
+      border-bottom-color: transparent;
+      cursor: default; }
+
+.nav-pills > li {
+  float: left; }
+  .nav-pills > li > a {
+    border-radius: 4px; }
+  .nav-pills > li + li {
+    margin-left: 2px; }
+  .nav-pills > li.active > a, .nav-pills > li.active > a:hover, .nav-pills > li.active > a:focus {
+    color: #fff;
+    background-color: #428bca; }
+
+.nav-stacked > li {
+  float: none; }
+  .nav-stacked > li + li {
+    margin-top: 2px;
+    margin-left: 0; }
+
+.nav-justified, .nav-tabs.nav-justified {
+  width: 100%; }
+  .nav-justified > li, .nav-justified > .nav-tabs.nav-justified {
+    float: none; }
+    .nav-justified > li > a, .nav-justified > li > .nav-tabs.nav-justified {
+      text-align: center;
+      margin-bottom: 5px; }
+  .nav-justified > .dropdown .dropdown-menu, .nav-justified > .dropdown .nav-tabs.nav-justified {
+    top: auto;
+    left: auto; }
+  @media (min-width: 768px) {
+    .nav-justified > li, .nav-justified > .nav-tabs.nav-justified {
+      display: table-cell;
+      width: 1%; }
+      .nav-justified > li > a, .nav-justified > li > .nav-tabs.nav-justified {
+        margin-bottom: 0; } }
+
+.nav-tabs-justified, .nav-tabs.nav-justified, .nav-tabs.nav-justified {
+  border-bottom: 0; }
+  .nav-tabs-justified > li > a, .nav-tabs-justified > li > .nav-tabs.nav-justified, .nav-tabs-justified > li > .nav-tabs.nav-justified {
+    margin-right: 0;
+    border-radius: 4px; }
+  .nav-tabs-justified > .active > a, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > a:hover, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > a:focus, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > .nav-tabs.nav-justified {
+    border: 1px solid #ddd; }
+  @media (min-width: 768px) {
+    .nav-tabs-justified > li > a, .nav-tabs-justified > li > .nav-tabs.nav-justified, .nav-tabs-justified > li > .nav-tabs.nav-justified {
+      border-bottom: 1px solid #ddd;
+      border-radius: 4px 4px 0 0; }
+    .nav-tabs-justified > .active > a, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > a:hover, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > a:focus, .nav-tabs-justified > .active > .nav-tabs.nav-justified, .nav-tabs-justified > .active > .nav-tabs.nav-justified {
+      border-bottom-color: #fff; } }
+
+.tab-content > .tab-pane {
+  display: none; }
+.tab-content > .active {
+  display: block; }
+
+.nav-tabs .dropdown-menu {
+  margin-top: -1px;
+  border-top-right-radius: 0;
+  border-top-left-radius: 0; }
+
+.navbar {
+  position: relative;
+  min-height: 50px;
+  margin-bottom: 20px;
+  border: 1px solid transparent; }
+  .navbar:before, .navbar:after {
+    content: " ";
+    display: table; }
+  .navbar:after {
+    clear: both; }
+  @media (min-width: 768px) {
+    .navbar {
+      border-radius: 4px; } }
+
+.navbar-header:before, .navbar-header:after {
+  content: " ";
+  display: table; }
+.navbar-header:after {
+  clear: both; }
+@media (min-width: 768px) {
+  .navbar-header {
+    float: left; } }
+
+.navbar-collapse {
+  overflow-x: visible;
+  padding-right: 15px;
+  padding-left: 15px;
+  border-top: 1px solid transparent;
+  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
+  -webkit-overflow-scrolling: touch; }
+  .navbar-collapse:before, .navbar-collapse:after {
+    content: " ";
+    display: table; }
+  .navbar-collapse:after {
+    clear: both; }
+  .navbar-collapse.in {
+    overflow-y: auto; }
+  @media (min-width: 768px) {
+    .navbar-collapse {
+      width: auto;
+      border-top: 0;
+      box-shadow: none; }
+      .navbar-collapse.collapse {
+        display: block !important;
+        height: auto !important;
+        padding-bottom: 0;
+        overflow: visible !important; }
+      .navbar-collapse.in {
+        overflow-y: visible; }
+      .navbar-fixed-top .navbar-collapse, .navbar-static-top .navbar-collapse, .navbar-fixed-bottom .navbar-collapse {
+        padding-left: 0;
+        padding-right: 0; } }
+
+.navbar-fixed-top .navbar-collapse, .navbar-fixed-bottom .navbar-collapse {
+  max-height: 340px; }
+  @media (max-width: 480px) and (orientation: landscape) {
+    .navbar-fixed-top .navbar-collapse, .navbar-fixed-bottom .navbar-collapse {
+      max-height: 200px; } }
+
+.container > .navbar-header, .container > .navbar-collapse, .container-fluid > .navbar-header, .container-fluid > .navbar-collapse {
+  margin-right: -15px;
+  margin-left: -15px; }
+  @media (min-width: 768px) {
+    .container > .navbar-header, .container > .navbar-collapse, .container-fluid > .navbar-header, .container-fluid > .navbar-collapse {
+      margin-right: 0;
+      margin-left: 0; } }
+
+.navbar-static-top {
+  z-index: 1000;
+  border-width: 0 0 1px; }
+  @media (min-width: 768px) {
+    .navbar-static-top {
+      border-radius: 0; } }
+
+.navbar-fixed-top, .navbar-fixed-bottom {
+  position: fixed;
+  right: 0;
+  left: 0;
+  z-index: 1030; }
+  @media (min-width: 768px) {
+    .navbar-fixed-top, .navbar-fixed-bottom {
+      border-radius: 0; } }
+
+.navbar-fixed-top {
+  top: 0;
+  border-width: 0 0 1px; }
+
+.navbar-fixed-bottom {
+  bottom: 0;
+  margin-bottom: 0;
+  border-width: 1px 0 0; }
+
+.navbar-brand {
+  float: left;
+  padding: 15px 15px;
+  font-size: 18px;
+  line-height: 20px;
+  height: 50px; }
+  .navbar-brand:hover, .navbar-brand:focus {
+    text-decoration: none; }
+  @media (min-width: 768px) {
+    .navbar > .container .navbar-brand, .navbar > .container-fluid .navbar-brand {
+      margin-left: -15px; } }
+
+.navbar-toggle {
+  position: relative;
+  float: right;
+  margin-right: 15px;
+  padding: 9px 10px;
+  margin-top: 8px;
+  margin-bottom: 8px;
+  background-color: transparent;
+  background-image: none;
+  border: 1px solid transparent;
+  border-radius: 4px; }
+  .navbar-toggle:focus {
+    outline: 0; }
+  .navbar-toggle .icon-bar {
+    display: block;
+    width: 22px;
+    height: 2px;
+    border-radius: 1px; }
+  .navbar-toggle .icon-bar + .icon-bar {
+    margin-top: 4px; }
+  @media (min-width: 768px) {
+    .navbar-toggle {
+      display: none; } }
+
+.navbar-nav {
+  margin: 7.5px -15px; }
+  .navbar-nav > li > a {
+    padding-top: 10px;
+    padding-bottom: 10px;
+    line-height: 20px; }
+  @media (max-width: 767px) {
+    .navbar-nav .open .dropdown-menu {
+      position: static;
+      float: none;
+      width: auto;
+      margin-top: 0;
+      background-color: transparent;
+      border: 0;
+      box-shadow: none; }
+      .navbar-nav .open .dropdown-menu > li > a, .navbar-nav .open .dropdown-menu .dropdown-header {
+        padding: 5px 15px 5px 25px; }
+      .navbar-nav .open .dropdown-menu > li > a {
+        line-height: 20px; }
+        .navbar-nav .open .dropdown-menu > li > a:hover, .navbar-nav .open .dropdown-menu > li > a:focus {
+          background-image: none; } }
+  @media (min-width: 768px) {
+    .navbar-nav {
+      float: left;
+      margin: 0; }
+      .navbar-nav > li {
+        float: left; }
+        .navbar-nav > li > a {
+          padding-top: 15px;
+          padding-bottom: 15px; }
+      .navbar-nav.navbar-right:last-child {
+        margin-right: -15px; } }
+
+@media (min-width: 768px) {
+  .navbar-left {
+    float: left !important; }
+  .navbar-right {
+    float: right !important; } }
+
+.navbar-form {
+  margin-left: -15px;
+  margin-right: -15px;
+  padding: 10px 15px;
+  border-top: 1px solid transparent;
+  border-bottom: 1px solid transparent;
+  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 0 rgba(255, 255, 255, 0.1);
+  margin-top: 8px;
+  margin-bottom: 8px; }
+  @media (max-width: 767px) {
+    .navbar-form .form-group {
+      margin-bottom: 5px; } }
+  @media (min-width: 768px) {
+    .navbar-form {
+      width: auto;
+      border: 0;
+      margin-left: 0;
+      margin-right: 0;
+      padding-top: 0;
+      padding-bottom: 0;
+      box-shadow: none; }
+      .navbar-form.navbar-right:last-child {
+        margin-right: -15px; } }
+
+.navbar-nav > li > .dropdown-menu {
+  margin-top: 0;
+  border-top-right-radius: 0;
+  border-top-left-radius: 0; }
+
+.navbar-fixed-bottom .navbar-nav > li > .dropdown-menu {
+  border-bottom-right-radius: 0;
+  border-bottom-left-radius: 0; }
+
+.navbar-btn {
+  margin-top: 8px;
+  margin-bottom: 8px; }
+  .navbar-btn.btn-sm, .btn-group-sm > .navbar-btn.btn {
+    margin-top: 10px;
+    margin-bottom: 10px; }
+  .navbar-btn.btn-xs, .btn-group-xs > .navbar-btn.btn {
+    margin-top: 14px;
+    margin-bottom: 14px; }
+
+.navbar-text {
+  margin-top: 15px;
+  margin-bottom: 15px; }
+  @media (min-width: 768px) {
+    .navbar-text {
+      float: left;
+      margin-left: 15px;
+      margin-right: 15px; }
+      .navbar-text.navbar-right:last-child {
+        margin-right: 0; } }
+
+.navbar-default {
+  background-color: #f8f8f8;
+  border-color: #e7e7e7; }
+  .navbar-default .navbar-brand {
+    color: #777; }
+    .navbar-default .navbar-brand:hover, .navbar-default .navbar-brand:focus {
+      color: #5e5e5e;
+      background-color: transparent; }
+  .navbar-default .navbar-text {
+    color: #777; }
+  .navbar-default .navbar-nav > li > a {
+    color: #777; }
+    .navbar-default .navbar-nav > li > a:hover, .navbar-default .navbar-nav > li > a:focus {
+      color: #333;
+      background-color: transparent; }
+  .navbar-default .navbar-nav > .active > a, .navbar-default .navbar-nav > .active > a:hover, .navbar-default .navbar-nav > .active > a:focus {
+    color: #555;
+    background-color: #e7e7e7; }
+  .navbar-default .navbar-nav > .disabled > a, .navbar-default .navbar-nav > .disabled > a:hover, .navbar-default .navbar-nav > .disabled > a:focus {
+    color: #ccc;
+    background-color: transparent; }
+  .navbar-default .navbar-toggle {
+    border-color: #ddd; }
+    .navbar-default .navbar-toggle:hover, .navbar-default .navbar-toggle:focus {
+      background-color: #ddd; }
+    .navbar-default .navbar-toggle .icon-bar {
+      background-color: #888; }
+  .navbar-default .navbar-collapse, .navbar-default .navbar-form {
+    border-color: #e7e7e7; }
+  .navbar-default .navbar-nav > .open > a, .navbar-default .navbar-nav > .open > a:hover, .navbar-default .navbar-nav > .open > a:focus {
+    background-color: #e7e7e7;
+    color: #555; }
+  @media (max-width: 767px) {
+    .navbar-default .navbar-nav .open .dropdown-menu > li > a {
+      color: #777; }
+      .navbar-default .navbar-nav .open .dropdown-menu > li > a:hover, .navbar-default .navbar-nav .open .dropdown-menu > li > a:focus {
+        color: #333;
+        background-color: transparent; }
+    .navbar-default .navbar-nav .open .dropdown-menu > .active > a, .navbar-default .navbar-nav .open .dropdown-menu > .active > a:hover, .navbar-default .navbar-nav .open .dropdown-menu > .active > a:focus {
+      color: #555;
+      background-color: #e7e7e7; }
+    .navbar-default .navbar-nav .open .dropdown-menu > .disabled > a, .navbar-default .navbar-nav .open .dropdown-menu > .disabled > a:hover, .navbar-default .navbar-nav .open .dropdown-menu > .disabled > a:focus {
+      color: #ccc;
+      background-color: transparent; } }
+  .navbar-default .navbar-link {
+    color: #777; }
+    .navbar-default .navbar-link:hover {
+      color: #333; }
+  .navbar-default .btn-link {
+    color: #777; }
+    .navbar-default .btn-link:hover, .navbar-default .btn-link:focus {
+      color: #333; }
+    .navbar-default .btn-link[disabled]:hover, .navbar-default .btn-link[disabled]:focus, fieldset[disabled] .navbar-default .btn-link:hover, fieldset[disabled] .navbar-default .btn-link:focus {
+      color: #ccc; }
+
+.navbar-inverse {
+  background-color: #222;
+  border-color: #090909; }
+  .navbar-inverse .navbar-brand {
+    color: #999999; }
+    .navbar-inverse .navbar-brand:hover, .navbar-inverse .navbar-brand:focus {
+      color: #fff;
+      background-color: transparent; }
+  .navbar-inverse .navbar-text {
+    color: #999999; }
+  .navbar-inverse .navbar-nav > li > a {
+    color: #999999; }
+    .navbar-inverse .navbar-nav > li > a:hover, .navbar-inverse .navbar-nav > li > a:focus {
+      color: #fff;
+      background-color: transparent; }
+  .navbar-inverse .navbar-nav > .active > a, .navbar-inverse .navbar-nav > .active > a:hover, .navbar-inverse .navbar-nav > .active > a:focus {
+    color: #fff;
+    background-color: #090909; }
+  .navbar-inverse .navbar-nav > .disabled > a, .navbar-inverse .navbar-nav > .disabled > a:hover, .navbar-inverse .navbar-nav > .disabled > a:focus {
+    color: #444;
+    background-color: transparent; }
+  .navbar-inverse .navbar-toggle {
+    border-color: #333; }
+    .navbar-inverse .navbar-toggle:hover, .navbar-inverse .navbar-toggle:focus {
+      background-color: #333; }
+    .navbar-inverse .navbar-toggle .icon-bar {
+      background-color: #fff; }
+  .navbar-inverse .navbar-collapse, .navbar-inverse .navbar-form {
+    border-color: #101010; }
+  .navbar-inverse .navbar-nav > .open > a, .navbar-inverse .navbar-nav > .open > a:hover, .navbar-inverse .navbar-nav > .open > a:focus {
+    background-color: #090909;
+    color: #fff; }
+  @media (max-width: 767px) {
+    .navbar-inverse .navbar-nav .open .dropdown-menu > .dropdown-header {
+      border-color: #090909; }
+    .navbar-inverse .navbar-nav .open .dropdown-menu .divider {
+      background-color: #090909; }
+    .navbar-inverse .navbar-nav .open .dropdown-menu > li > a {
+      color: #999999; }
+      .navbar-inverse .navbar-nav .open .dropdown-menu > li > a:hover, .navbar-inverse .navbar-nav .open .dropdown-menu > li > a:focus {
+        color: #fff;
+        background-color: transparent; }
+    .navbar-inverse .navbar-nav .open .dropdown-menu > .active > a, .navbar-inverse .navbar-nav .open .dropdown-menu > .active > a:hover, .navbar-inverse .navbar-nav .open .dropdown-menu > .active > a:focus {
+      color: #fff;
+      background-color: #090909; }
+    .navbar-inverse .navbar-nav .open .dropdown-menu > .disabled > a, .navbar-inverse .navbar-nav .open .dropdown-menu > .disabled > a:hover, .navbar-inverse .navbar-nav .open .dropdown-menu > .disabled > a:focus {
+      color: #444;
+      background-color: transparent; } }
+  .navbar-inverse .navbar-link {
+    color: #999999; }
+    .navbar-inverse .navbar-link:hover {
+      color: #fff; }
+  .navbar-inverse .btn-link {
+    color: #999999; }
+    .navbar-inverse .btn-link:hover, .navbar-inverse .btn-link:focus {
+      color: #fff; }
+    .navbar-inverse .btn-link[disabled]:hover, .navbar-inverse .btn-link[disabled]:focus, fieldset[disabled] .navbar-inverse .btn-link:hover, fieldset[disabled] .navbar-inverse .btn-link:focus {
+      color: #444; }
+
+.breadcrumb {
+  padding: 8px 15px;
+  margin-bottom: 20px;
+  list-style: none;
+  background-color: #f5f5f5;
+  border-radius: 4px; }
+  .breadcrumb > li {
+    display: inline-block; }
+    .breadcrumb > li + li:before {
+      content: "/\00a0";
+      padding: 0 5px;
+      color: #ccc; }
+  .breadcrumb > .active {
+    color: #999999; }
+
+.pagination {
+  display: inline-block;
+  padding-left: 0;
+  margin: 20px 0;
+  border-radius: 4px; }
+  .pagination > li {
+    display: inline; }
+    .pagination > li > a, .pagination > li > span {
+      position: relative;
+      float: left;
+      padding: 6px 12px;
+      line-height: 1.42857;
+      text-decoration: none;
+      color: #428bca;
+      background-color: #fff;
+      border: 1px solid #ddd;
+      margin-left: -1px; }
+    .pagination > li:first-child > a, .pagination > li:first-child > span {
+      margin-left: 0;
+      border-bottom-left-radius: 4px;
+      border-top-left-radius: 4px; }
+    .pagination > li:last-child > a, .pagination > li:last-child > span {
+      border-bottom-right-radius: 4px;
+      border-top-right-radius: 4px; }
+  .pagination > li > a:hover, .pagination > li > a:focus, .pagination > li > span:hover, .pagination > li > span:focus {
+    color: #2a6596;
+    background-color: #eeeeee;
+    border-color: #ddd; }
+  .pagination > .active > a, .pagination > .active > a:hover, .pagination > .active > a:focus, .pagination > .active > span, .pagination > .active > span:hover, .pagination > .active > span:focus {
+    z-index: 2;
+    color: #fff;
+    background-color: #428bca;
+    border-color: #428bca;
+    cursor: default; }
+  .pagination > .disabled > span, .pagination > .disabled > span:hover, .pagination > .disabled > span:focus, .pagination > .disabled > a, .pagination > .disabled > a:hover, .pagination > .disabled > a:focus {
+    color: #999999;
+    background-color: #fff;
+    border-color: #ddd;
+    cursor: not-allowed; }
+
+.pagination-lg > li > a, .pagination-lg > li > span {
+  padding: 10px 16px;
+  font-size: 18px; }
+.pagination-lg > li:first-child > a, .pagination-lg > li:first-child > span {
+  border-bottom-left-radius: 6px;
+  border-top-left-radius: 6px; }
+.pagination-lg > li:last-child > a, .pagination-lg > li:last-child > span {
+  border-bottom-right-radius: 6px;
+  border-top-right-radius: 6px; }
+
+.pagination-sm > li > a, .pagination-sm > li > span {
+  padding: 5px 10px;
+  font-size: 12px; }
+.pagination-sm > li:first-child > a, .pagination-sm > li:first-child > span {
+  border-bottom-left-radius: 3px;
+  border-top-left-radius: 3px; }
+.pagination-sm > li:last-child > a, .pagination-sm > li:last-child > span {
+  border-bottom-right-radius: 3px;
+  border-top-right-radius: 3px; }
+
+.pager {
+  padding-left: 0;
+  margin: 20px 0;
+  list-style: none;
+  text-align: center; }
+  .pager:before, .pager:after {
+    content: " ";
+    display: table; }
+  .pager:after {
+    clear: both; }
+  .pager li {
+    display: inline; }
+    .pager li > a, .pager li > span {
+      display: inline-block;
+      padding: 5px 14px;
+      background-color: #fff;
+      border: 1px solid #ddd;
+      border-radius: 15px; }
+    .pager li > a:hover, .pager li > a:focus {
+      text-decoration: none;
+      background-color: #eeeeee; }
+  .pager .next > a, .pager .next > span {
+    float: right; }
+  .pager .previous > a, .pager .previous > span {
+    float: left; }
+  .pager .disabled > a, .pager .disabled > a:hover, .pager .disabled > a:focus, .pager .disabled > span {
+    color: #999999;
+    background-color: #fff;
+    cursor: not-allowed; }
+
+.label {
+  display: inline;
+  padding: 0.2em 0.6em 0.3em;
+  font-size: 75%;
+  font-weight: bold;
+  line-height: 1;
+  color: #fff;
+  text-align: center;
+  white-space: nowrap;
+  vertical-align: baseline;
+  border-radius: 0.25em; }
+  .label:empty {
+    display: none; }
+  .btn .label {
+    position: relative;
+    top: -1px; }
+
+a.label:hover, a.label:focus {
+  color: #fff;
+  text-decoration: none;
+  cursor: pointer; }
+
+.label-default {
+  background-color: #999999; }
+  .label-default[href]:hover, .label-default[href]:focus {
+    background-color: #808080; }
+
+.label-primary {
+  background-color: #428bca; }
+  .label-primary[href]:hover, .label-primary[href]:focus {
+    background-color: #3073a9; }
+
+.label-success {
+  background-color: #5cb85c; }
+  .label-success[href]:hover, .label-success[href]:focus {
+    background-color: #469d44; }
+
+.label-info {
+  background-color: #5bc0de; }
+  .label-info[href]:hover, .label-info[href]:focus {
+    background-color: #31b2d5; }
+
+.label-warning {
+  background-color: #f0ad4e; }
+  .label-warning[href]:hover, .label-warning[href]:focus {
+    background-color: #ec971f; }
+
+.label-danger {
+  background-color: #d9534f; }
+  .label-danger[href]:hover, .label-danger[href]:focus {
+    background-color: #c92e2c; }
+
+.badge {
+  display: inline-block;
+  min-width: 10px;
+  padding: 3px 7px;
+  font-size: 12px;
+  font-weight: bold;
+  color: #fff;
+  line-height: 1;
+  vertical-align: baseline;
+  white-space: nowrap;
+  text-align: center;
+  background-color: #999999;
+  border-radius: 10px; }
+  .badge:empty {
+    display: none; }
+  .btn .badge {
+    position: relative;
+    top: -1px; }
+  .btn-xs .badge, .btn-xs .btn-group-xs > .btn, .btn-group-xs > .btn-xs .btn {
+    top: 0;
+    padding: 1px 5px; }
+  a.list-group-item.active > .badge, .nav-pills > .active > a > .badge {
+    color: #428bca;
+    background-color: #fff; }
+  .nav-pills > li > a > .badge {
+    margin-left: 3px; }
+
+a.badge:hover, a.badge:focus {
+  color: #fff;
+  text-decoration: none;
+  cursor: pointer; }
+
+.jumbotron {
+  padding: 30px;
+  margin-bottom: 30px;
+  color: inherit;
+  background-color: #eeeeee; }
+  .jumbotron h1, .jumbotron .h1 {
+    color: inherit; }
+  .jumbotron p {
+    margin-bottom: 15px;
+    font-size: 21px;
+    font-weight: 200; }
+  .jumbotron > hr {
+    border-top-color: #d5d5d5; }
+  .container .jumbotron {
+    border-radius: 6px; }
+  .jumbotron .container {
+    max-width: 100%; }
+  @media screen and (min-width: 768px) {
+    .jumbotron {
+      padding-top: 48px;
+      padding-bottom: 48px; }
+      .container .jumbotron {
+        padding-left: 60px;
+        padding-right: 60px; }
+      .jumbotron h1, .jumbotron .h1 {
+        font-size: 63px; } }
+
+.thumbnail {
+  display: block;
+  padding: 4px;
+  margin-bottom: 20px;
+  line-height: 1.42857;
+  background-color: #fff;
+  border: 1px solid #ddd;
+  border-radius: 4px;
+  transition: all 0.2s ease-in-out; }
+  .thumbnail > img, .thumbnail a > img {
+    display: block;
+    max-width: 100%;
+    height: auto;
+    margin-left: auto;
+    margin-right: auto; }
+  .thumbnail .caption {
+    padding: 9px;
+    color: #333333; }
+
+a.thumbnail:hover, a.thumbnail:focus, a.thumbnail.active {
+  border-color: #428bca; }
+
+.alert {
+  padding: 15px;
+  margin-bottom: 20px;
+  border: 1px solid transparent;
+  border-radius: 4px; }
+  .alert h4 {
+    margin-top: 0;
+    color: inherit; }
+  .alert .alert-link {
+    font-weight: bold; }
+  .alert > p, .alert > ul {
+    margin-bottom: 0; }
+  .alert > p + p {
+    margin-top: 5px; }
+
+.alert-dismissable {
+  padding-right: 35px; }
+  .alert-dismissable .close {
+    position: relative;
+    top: -2px;
+    right: -21px;
+    color: inherit; }
+
+.alert-success {
+  background-color: #dff0d8;
+  border-color: #d7e9c6;
+  color: #3c763d; }
+  .alert-success hr {
+    border-top-color: #cae2b3; }
+  .alert-success .alert-link {
+    color: #2b542b; }
+
+.alert-info {
+  background-color: #d9edf7;
+  border-color: #bce9f1;
+  color: #31708f; }
+  .alert-info hr {
+    border-top-color: #a6e2ec; }
+  .alert-info .alert-link {
+    color: #245369; }
+
+.alert-warning {
+  background-color: #fcf8e3;
+  border-color: #faeacc;
+  color: #8a6d3b; }
+  .alert-warning hr {
+    border-top-color: #f7e0b5; }
+  .alert-warning .alert-link {
+    color: #66502c; }
+
+.alert-danger {
+  background-color: #f2dede;
+  border-color: #ebccd1;
+  color: #a94442; }
+  .alert-danger hr {
+    border-top-color: #e4b9c0; }
+  .alert-danger .alert-link {
+    color: #843534; }
+
+@-webkit-keyframes progress-bar-stripes {
+  from {
+    background-position: 40px 0; }
+
+  to {
+    background-position: 0 0; } }
+
+@keyframes progress-bar-stripes {
+  from {
+    background-position: 40px 0; }
+
+  to {
+    background-position: 0 0; } }
+
+.progress {
+  overflow: hidden;
+  height: 20px;
+  margin-bottom: 20px;
+  background-color: #f5f5f5;
+  border-radius: 4px;
+  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1); }
+
+.progress-bar {
+  float: left;
+  width: 0%;
+  height: 100%;
+  font-size: 12px;
+  line-height: 20px;
+  color: #fff;
+  text-align: center;
+  background-color: #428bca;
+  box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.15);
+  transition: width 0.6s ease; }
+
+.progress-striped .progress-bar {
+  background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
+  background-size: 40px 40px; }
+
+.progress.active .progress-bar {
+  -webkit-animation: progress-bar-stripes 2s linear infinite;
+  animation: progress-bar-stripes 2s linear infinite; }
+
+.progress-bar[aria-valuenow="1"], .progress-bar[aria-valuenow="2"] {
+  min-width: 30px; }
+.progress-bar[aria-valuenow="0"] {
+  color: #999999;
+  min-width: 30px;
+  background-color: transparent;
+  background-image: none;
+  box-shadow: none; }
+
+.progress-bar-success {
+  background-color: #5cb85c; }
+  .progress-striped .progress-bar-success {
+    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent); }
+
+.progress-bar-info {
+  background-color: #5bc0de; }
+  .progress-striped .progress-bar-info {
+    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent); }
+
+.progress-bar-warning {
+  background-color: #f0ad4e; }
+  .progress-striped .progress-bar-warning {
+    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent); }
+
+.progress-bar-danger {
+  background-color: #d9534f; }
+  .progress-striped .progress-bar-danger {
+    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent); }
+
+.media, .media-body {
+  overflow: hidden;
+  zoom: 1; }
+
+.media, .media .media {
+  margin-top: 15px; }
+
+.media:first-child {
+  margin-top: 0; }
+
+.media-object {
+  display: block; }
+
+.media-heading {
+  margin: 0 0 5px; }
+
+.media > .pull-left {
+  margin-right: 10px; }
+.media > .pull-right {
+  margin-left: 10px; }
+
+.media-list {
+  padding-left: 0;
+  list-style: none; }
+
+.list-group {
+  margin-bottom: 20px;
+  padding-left: 0; }
+
+.list-group-item {
+  position: relative;
+  display: block;
+  padding: 10px 15px;
+  margin-bottom: -1px;
+  background-color: #fff;
+  border: 1px solid #ddd; }
+  .list-group-item:first-child {
+    border-top-right-radius: 4px;
+    border-top-left-radius: 4px; }
+  .list-group-item:last-child {
+    margin-bottom: 0;
+    border-bottom-right-radius: 4px;
+    border-bottom-left-radius: 4px; }
+  .list-group-item > .badge {
+    float: right; }
+  .list-group-item > .badge + .badge {
+    margin-right: 5px; }
+
+a.list-group-item {
+  color: #555; }
+  a.list-group-item .list-group-item-heading {
+    color: #333; }
+  a.list-group-item:hover, a.list-group-item:focus {
+    text-decoration: none;
+    color: #555;
+    background-color: #f5f5f5; }
+
+.list-group-item.disabled, .list-group-item.disabled:hover, .list-group-item.disabled:focus {
+  background-color: #eeeeee;
+  color: #999999; }
+  .list-group-item.disabled .list-group-item-heading, .list-group-item.disabled:hover .list-group-item-heading, .list-group-item.disabled:focus .list-group-item-heading {
+    color: inherit; }
+  .list-group-item.disabled .list-group-item-text, .list-group-item.disabled:hover .list-group-item-text, .list-group-item.disabled:focus .list-group-item-text {
+    color: #999999; }
+.list-group-item.active, .list-group-item.active:hover, .list-group-item.active:focus {
+  z-index: 2;
+  color: #fff;
+  background-color: #428bca;
+  border-color: #428bca; }
+  .list-group-item.active .list-group-item-heading, .list-group-item.active:hover .list-group-item-heading, .list-group-item.active:focus .list-group-item-heading {
+    color: inherit; }
+  .list-group-item.active .list-group-item-text, .list-group-item.active:hover .list-group-item-text, .list-group-item.active:focus .list-group-item-text {
+    color: #e1edf7; }
+
+.list-group-item-success {
+  color: #3c763d;
+  background-color: #dff0d8; }
+
+a.list-group-item-success {
+  color: #3c763d; }
+  a.list-group-item-success .list-group-item-heading {
+    color: inherit; }
+  a.list-group-item-success:hover, a.list-group-item-success:focus {
+    color: #3c763d;
+    background-color: #d0e9c6; }
+  a.list-group-item-success.active, a.list-group-item-success.active:hover, a.list-group-item-success.active:focus {
+    color: #fff;
+    background-color: #3c763d;
+    border-color: #3c763d; }
+
+.list-group-item-info {
+  color: #31708f;
+  background-color: #d9edf7; }
+
+a.list-group-item-info {
+  color: #31708f; }
+  a.list-group-item-info .list-group-item-heading {
+    color: inherit; }
+  a.list-group-item-info:hover, a.list-group-item-info:focus {
+    color: #31708f;
+    background-color: #c4e4f3; }
+  a.list-group-item-info.active, a.list-group-item-info.active:hover, a.list-group-item-info.active:focus {
+    color: #fff;
+    background-color: #31708f;
+    border-color: #31708f; }
+
+.list-group-item-warning {
+  color: #8a6d3b;
+  background-color: #fcf8e3; }
+
+a.list-group-item-warning {
+  color: #8a6d3b; }
+  a.list-group-item-warning .list-group-item-heading {
+    color: inherit; }
+  a.list-group-item-warning:hover, a.list-group-item-warning:focus {
+    color: #8a6d3b;
+    background-color: #faf2cc; }
+  a.list-group-item-warning.active, a.list-group-item-warning.active:hover, a.list-group-item-warning.active:focus {
+    color: #fff;
+    background-color: #8a6d3b;
+    border-color: #8a6d3b; }
+
+.list-group-item-danger {
+  color: #a94442;
+  background-color: #f2dede; }
+
+a.list-group-item-danger {
+  color: #a94442; }
+  a.list-group-item-danger .list-group-item-heading {
+    color: inherit; }
+  a.list-group-item-danger:hover, a.list-group-item-danger:focus {
+    color: #a94442;
+    background-color: #ebcccc; }
+  a.list-group-item-danger.active, a.list-group-item-danger.active:hover, a.list-group-item-danger.active:focus {
+    color: #fff;
+    background-color: #a94442;
+    border-color: #a94442; }
+
+.list-group-item-heading {
+  margin-top: 0;
+  margin-bottom: 5px; }
+
+.list-group-item-text {
+  margin-bottom: 0;
+  line-height: 1.3; }
+
+.panel {
+  margin-bottom: 20px;
+  background-color: #fff;
+  border: 1px solid transparent;
+  border-radius: 4px;
+  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.05); }
+
+.panel-body {
+  padding: 15px; }
+  .panel-body:before, .panel-body:after {
+    content: " ";
+    display: table; }
+  .panel-body:after {
+    clear: both; }
+
+.panel-heading {
+  padding: 10px 15px;
+  border-bottom: 1px solid transparent;
+  border-top-right-radius: 3px;
+  border-top-left-radius: 3px; }
+  .panel-heading > .dropdown .dropdown-toggle {
+    color: inherit; }
+
+.panel-title {
+  margin-top: 0;
+  margin-bottom: 0;
+  font-size: 16px;
+  color: inherit; }
+  .panel-title > a {
+    color: inherit; }
+
+.panel-footer {
+  padding: 10px 15px;
+  background-color: #f5f5f5;
+  border-top: 1px solid #ddd;
+  border-bottom-right-radius: 3px;
+  border-bottom-left-radius: 3px; }
+
+.panel > .list-group {
+  margin-bottom: 0; }
+  .panel > .list-group .list-group-item {
+    border-width: 1px 0;
+    border-radius: 0; }
+  .panel > .list-group:first-child .list-group-item:first-child {
+    border-top: 0;
+    border-top-right-radius: 3px;
+    border-top-left-radius: 3px; }
+  .panel > .list-group:last-child .list-group-item:last-child {
+    border-bottom: 0;
+    border-bottom-right-radius: 3px;
+    border-bottom-left-radius: 3px; }
+
+.panel-heading + .list-group .list-group-item:first-child {
+  border-top-width: 0; }
+
+.panel > .table, .panel > .table-responsive > .table {
+  margin-bottom: 0; }
+.panel > .table:first-child, .panel > .table-responsive:first-child > .table:first-child {
+  border-top-right-radius: 3px;
+  border-top-left-radius: 3px; }
+  .panel > .table:first-child > thead:first-child > tr:first-child td:first-child, .panel > .table:first-child > thead:first-child > tr:first-child th:first-child, .panel > .table:first-child > tbody:first-child > tr:first-child td:first-child, .panel > .table:first-child > tbody:first-child > tr:first-child th:first-child, .panel > .table-responsive:first-child > .table:first-child > thead:first-child > tr:first-child td:first-child, .panel > .table-responsive:first-child > .table:first-child > thead:first-child > tr:first-child th:first-child, .panel > .table-responsive:first-child > .table:first-child > tbody:first-child > tr:first-child td:first-child, .panel > .table-responsive:first-child > .table:first-child > tbody:first-child > tr:first-child th:first-child {
+    border-top-left-radius: 3px; }
+  .panel > .table:first-child > thead:first-child > tr:first-child td:last-child, .panel > .table:first-child > thead:first-child > tr:first-child th:last-child, .panel > .table:first-child > tbody:first-child > tr:first-child td:last-child, .panel > .table:first-child > tbody:first-child > tr:first-child th:last-child, .panel > .table-responsive:first-child > .table:first-child > thead:first-child > tr:first-child td:last-child, .panel > .table-responsive:first-child > .table:first-child > thead:first-child > tr:first-child th:last-child, .panel > .table-responsive:first-child > .table:first-child > tbody:first-child > tr:first-child td:last-child, .panel > .table-responsive:first-child > .table:first-child > tbody:first-child > tr:first-child th:last-child {
+    border-top-right-radius: 3px; }
+.panel > .table:last-child, .panel > .table-responsive:last-child > .table:last-child {
+  border-bottom-right-radius: 3px;
+  border-bottom-left-radius: 3px; }
+  .panel > .table:last-child > tbody:last-child > tr:last-child td:first-child, .panel > .table:last-child > tbody:last-child > tr:last-child th:first-child, .panel > .table:last-child > tfoot:last-child > tr:last-child td:first-child, .panel > .table:last-child > tfoot:last-child > tr:last-child th:first-child, .panel > .table-responsive:last-child > .table:last-child > tbody:last-child > tr:last-child td:first-child, .panel > .table-responsive:last-child > .table:last-child > tbody:last-child > tr:last-child th:first-child, .panel > .table-responsive:last-child > .table:last-child > tfoot:last-child > tr:last-child td:first-child, .panel > .table-responsive:last-child > .table:last-child > tfoot:last-child > tr:last-child th:first-child {
+    border-bottom-left-radius: 3px; }
+  .panel > .table:last-child > tbody:last-child > tr:last-child td:last-child, .panel > .table:last-child > tbody:last-child > tr:last-child th:last-child, .panel > .table:last-child > tfoot:last-child > tr:last-child td:last-child, .panel > .table:last-child > tfoot:last-child > tr:last-child th:last-child, .panel > .table-responsive:last-child > .table:last-child > tbody:last-child > tr:last-child td:last-child, .panel > .table-responsive:last-child > .table:last-child > tbody:last-child > tr:last-child th:last-child, .panel > .table-responsive:last-child > .table:last-child > tfoot:last-child > tr:last-child td:last-child, .panel > .table-responsive:last-child > .table:last-child > tfoot:last-child > tr:last-child th:last-child {
+    border-bottom-right-radius: 3px; }
+.panel > .panel-body + .table, .panel > .panel-body + .table-responsive {
+  border-top: 1px solid #ddd; }
+.panel > .table > tbody:first-child > tr:first-child th, .panel > .table > tbody:first-child > tr:first-child td {
+  border-top: 0; }
+.panel > .table-bordered, .panel > .table-responsive > .table-bordered {
+  border: 0; }
+  .panel > .table-bordered > thead > tr > th:first-child, .panel > .table-bordered > thead > tr > td:first-child, .panel > .table-bordered > tbody > tr > th:first-child, .panel > .table-bordered > tbody > tr > td:first-child, .panel > .table-bordered > tfoot > tr > th:first-child, .panel > .table-bordered > tfoot > tr > td:first-child, .panel > .table-responsive > .table-bordered > thead > tr > th:first-child, .panel > .table-responsive > .table-bordered > thead > tr > td:first-child, .panel > .table-responsive > .table-bordered > tbody > tr > th:first-child, .panel > .table-responsive > .table-bordered > tbody > tr > td:first-child, .panel > .table-responsive > .table-bordered > tfoot > tr > th:first-child, .panel > .table-responsive > .table-bordered > tfoot > tr > td:first-child {
+    border-left: 0; }
+  .panel > .table-bordered > thead > tr > th:last-child, .panel > .table-bordered > thead > tr > td:last-child, .panel > .table-bordered > tbody > tr > th:last-child, .panel > .table-bordered > tbody > tr > td:last-child, .panel > .table-bordered > tfoot > tr > th:last-child, .panel > .table-bordered > tfoot > tr > td:last-child, .panel > .table-responsive > .table-bordered > thead > tr > th:last-child, .panel > .table-responsive > .table-bordered > thead > tr > td:last-child, .panel > .table-responsive > .table-bordered > tbody > tr > th:last-child, .panel > .table-responsive > .table-bordered > tbody > tr > td:last-child, .panel > .table-responsive > .table-bordered > tfoot > tr > th:last-child, .panel > .table-responsive > .table-bordered > tfoot > tr > td:last-child {
+    border-right: 0; }
+  .panel > .table-bordered > thead > tr:first-child > td, .panel > .table-bordered > thead > tr:first-child > th, .panel > .table-bordered > tbody > tr:first-child > td, .panel > .table-bordered > tbody > tr:first-child > th, .panel > .table-responsive > .table-bordered > thead > tr:first-child > td, .panel > .table-responsive > .table-bordered > thead > tr:first-child > th, .panel > .table-responsive > .table-bordered > tbody > tr:first-child > td, .panel > .table-responsive > .table-bordered > tbody > tr:first-child > th {
+    border-bottom: 0; }
+  .panel > .table-bordered > tbody > tr:last-child > td, .panel > .table-bordered > tbody > tr:last-child > th, .panel > .table-bordered > tfoot > tr:last-child > td, .panel > .table-bordered > tfoot > tr:last-child > th, .panel > .table-responsive > .table-bordered > tbody > tr:last-child > td, .panel > .table-responsive > .table-bordered > tbody > tr:last-child > th, .panel > .table-responsive > .table-bordered > tfoot > tr:last-child > td, .panel > .table-responsive > .table-bordered > tfoot > tr:last-child > th {
+    border-bottom: 0; }
+.panel > .table-responsive {
+  border: 0;
+  margin-bottom: 0; }
+
+.panel-group {
+  margin-bottom: 20px; }
+  .panel-group .panel {
+    margin-bottom: 0;
+    border-radius: 4px; }
+    .panel-group .panel + .panel {
+      margin-top: 5px; }
+  .panel-group .panel-heading {
+    border-bottom: 0; }
+    .panel-group .panel-heading + .panel-collapse .panel-body {
+      border-top: 1px solid #ddd; }
+  .panel-group .panel-footer {
+    border-top: 0; }
+    .panel-group .panel-footer + .panel-collapse .panel-body {
+      border-bottom: 1px solid #ddd; }
+
+.panel-default {
+  border-color: #ddd; }
+  .panel-default > .panel-heading {
+    color: #333333;
+    background-color: #f5f5f5;
+    border-color: #ddd; }
+    .panel-default > .panel-heading + .panel-collapse > .panel-body {
+      border-top-color: #ddd; }
+  .panel-default > .panel-footer + .panel-collapse > .panel-body {
+    border-bottom-color: #ddd; }
+
+.panel-primary {
+  border-color: #428bca; }
+  .panel-primary > .panel-heading {
+    color: #fff;
+    background-color: #428bca;
+    border-color: #428bca; }
+    .panel-primary > .panel-heading + .panel-collapse > .panel-body {
+      border-top-color: #428bca; }
+  .panel-primary > .panel-footer + .panel-collapse > .panel-body {
+    border-bottom-color: #428bca; }
+
+.panel-success {
+  border-color: #d7e9c6; }
+  .panel-success > .panel-heading {
+    color: #3c763d;
+    background-color: #dff0d8;
+    border-color: #d7e9c6; }
+    .panel-success > .panel-heading + .panel-collapse > .panel-body {
+      border-top-color: #d7e9c6; }
+  .panel-success > .panel-footer + .panel-collapse > .panel-body {
+    border-bottom-color: #d7e9c6; }
+
+.panel-info {
+  border-color: #bce9f1; }
+  .panel-info > .panel-heading {
+    color: #31708f;
+    background-color: #d9edf7;
+    border-color: #bce9f1; }
+    .panel-info > .panel-heading + .panel-collapse > .panel-body {
+      border-top-color: #bce9f1; }
+  .panel-info > .panel-footer + .panel-collapse > .panel-body {
+    border-bottom-color: #bce9f1; }
+
+.panel-warning {
+  border-color: #faeacc; }
+  .panel-warning > .panel-heading {
+    color: #8a6d3b;
+    background-color: #fcf8e3;
+    border-color: #faeacc; }
+    .panel-warning > .panel-heading + .panel-collapse > .panel-body {
+      border-top-color: #faeacc; }
+  .panel-warning > .panel-footer + .panel-collapse > .panel-body {
+    border-bottom-color: #faeacc; }
+
+.panel-danger {
+  border-color: #ebccd1; }
+  .panel-danger > .panel-heading {
+    color: #a94442;
+    background-color: #f2dede;
+    border-color: #ebccd1; }
+    .panel-danger > .panel-heading + .panel-collapse > .panel-body {
+      border-top-color: #ebccd1; }
+  .panel-danger > .panel-footer + .panel-collapse > .panel-body {
+    border-bottom-color: #ebccd1; }
+
+.embed-responsive {
+  position: relative;
+  display: block;
+  height: 0;
+  padding: 0;
+  overflow: hidden; }
+  .embed-responsive .embed-responsive-item, .embed-responsive iframe, .embed-responsive embed, .embed-responsive object {
+    position: absolute;
+    top: 0;
+    left: 0;
+    bottom: 0;
+    height: 100%;
+    width: 100%;
+    border: 0; }
+  .embed-responsive.embed-responsive-16by9 {
+    padding-bottom: 56.25%; }
+  .embed-responsive.embed-responsive-4by3 {
+    padding-bottom: 75%; }
+
+.well {
+  min-height: 20px;
+  padding: 19px;
+  margin-bottom: 20px;
+  background-color: #f5f5f5;
+  border: 1px solid #e3e3e3;
+  border-radius: 4px;
+  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.05); }
+  .well blockquote {
+    border-color: #ddd;
+    border-color: rgba(0, 0, 0, 0.15); }
+
+.well-lg {
+  padding: 24px;
+  border-radius: 6px; }
+
+.well-sm {
+  padding: 9px;
+  border-radius: 3px; }
+
+.close {
+  float: right;
+  font-size: 21px;
+  font-weight: bold;
+  line-height: 1;
+  color: #000;
+  text-shadow: 0 1px 0 #fff;
+  opacity: 0.2;
+  filter: alpha(opacity=20); }
+  .close:hover, .close:focus {
+    color: #000;
+    text-decoration: none;
+    cursor: pointer;
+    opacity: 0.5;
+    filter: alpha(opacity=50); }
+
+button.close {
+  padding: 0;
+  cursor: pointer;
+  background: transparent;
+  border: 0;
+  -webkit-appearance: none; }
+
+.modal-open {
+  overflow: hidden; }
+
+.modal {
+  display: none;
+  overflow: auto;
+  overflow-y: scroll;
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+  z-index: 1050;
+  -webkit-overflow-scrolling: touch;
+  outline: 0; }
+  .modal.fade .modal-dialog {
+    -webkit-transform: translate(0, -25%);
+    transform: translate(0, -25%);
+    transition: -webkit-transform 0.3s ease-out;
+    transition: transform 0.3s ease-out; }
+  .modal.in .modal-dialog {
+    -webkit-transform: translate(0, 0);
+    transform: translate(0, 0); }
+
+.modal-dialog {
+  position: relative;
+  width: auto;
+  margin: 10px; }
+
+.modal-content {
+  position: relative;
+  background-color: #fff;
+  border: 1px solid #999;
+  border: 1px solid rgba(0, 0, 0, 0.2);
+  border-radius: 6px;
+  box-shadow: 0 3px 9px rgba(0, 0, 0, 0.5);
+  background-clip: padding-box;
+  outline: 0; }
+
+.modal-backdrop {
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+  z-index: 1040;
+  background-color: #000; }
+  .modal-backdrop.fade {
+    opacity: 0;
+    filter: alpha(opacity=0); }
+  .modal-backdrop.in {
+    opacity: 0.5;
+    filter: alpha(opacity=50); }
+
+.modal-header {
+  padding: 15px;
+  border-bottom: 1px solid #e5e5e5;
+  min-height: 16.42857px; }
+
+.modal-header .close {
+  margin-top: -2px; }
+
+.modal-title {
+  margin: 0;
+  line-height: 1.42857; }
+
+.modal-body {
+  position: relative;
+  padding: 15px; }
+
+.modal-footer {
+  padding: 15px;
+  text-align: right;
+  border-top: 1px solid #e5e5e5; }
+  .modal-footer:before, .modal-footer:after {
+    content: " ";
+    display: table; }
+  .modal-footer:after {
+    clear: both; }
+  .modal-footer .btn + .btn {
+    margin-left: 5px;
+    margin-bottom: 0; }
+  .modal-footer .btn-group .btn + .btn {
+    margin-left: -1px; }
+  .modal-footer .btn-block + .btn-block {
+    margin-left: 0; }
+
+.modal-scrollbar-measure {
+  position: absolute;
+  top: -9999px;
+  width: 50px;
+  height: 50px;
+  overflow: scroll; }
+
+@media (min-width: 768px) {
+  .modal-dialog {
+    width: 600px;
+    margin: 30px auto; }
+  .modal-content {
+    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5); }
+  .modal-sm {
+    width: 300px; } }
+
+@media (min-width: 992px) {
+  .modal-lg {
+    width: 900px; } }
+
+.tooltip {
+  position: absolute;
+  z-index: 1070;
+  display: block;
+  visibility: visible;
+  font-size: 12px;
+  line-height: 1.4;
+  opacity: 0;
+  filter: alpha(opacity=0); }
+  .tooltip.in {
+    opacity: 0.9;
+    filter: alpha(opacity=90); }
+  .tooltip.top {
+    margin-top: -3px;
+    padding: 5px 0; }
+  .tooltip.right {
+    margin-left: 3px;
+    padding: 0 5px; }
+  .tooltip.bottom {
+    margin-top: 3px;
+    padding: 5px 0; }
+  .tooltip.left {
+    margin-left: -3px;
+    padding: 0 5px; }
+
+.tooltip-inner {
+  max-width: 200px;
+  padding: 3px 8px;
+  color: #fff;
+  text-align: center;
+  text-decoration: none;
+  background-color: #000;
+  border-radius: 4px; }
+
+.tooltip-arrow {
+  position: absolute;
+  width: 0;
+  height: 0;
+  border-color: transparent;
+  border-style: solid; }
+
+.tooltip.top .tooltip-arrow {
+  bottom: 0;
+  left: 50%;
+  margin-left: -5px;
+  border-width: 5px 5px 0;
+  border-top-color: #000; }
+.tooltip.top-left .tooltip-arrow {
+  bottom: 0;
+  left: 5px;
+  border-width: 5px 5px 0;
+  border-top-color: #000; }
+.tooltip.top-right .tooltip-arrow {
+  bottom: 0;
+  right: 5px;
+  border-width: 5px 5px 0;
+  border-top-color: #000; }
+.tooltip.right .tooltip-arrow {
+  top: 50%;
+  left: 0;
+  margin-top: -5px;
+  border-width: 5px 5px 5px 0;
+  border-right-color: #000; }
+.tooltip.left .tooltip-arrow {
+  top: 50%;
+  right: 0;
+  margin-top: -5px;
+  border-width: 5px 0 5px 5px;
+  border-left-color: #000; }
+.tooltip.bottom .tooltip-arrow {
+  top: 0;
+  left: 50%;
+  margin-left: -5px;
+  border-width: 0 5px 5px;
+  border-bottom-color: #000; }
+.tooltip.bottom-left .tooltip-arrow {
+  top: 0;
+  left: 5px;
+  border-width: 0 5px 5px;
+  border-bottom-color: #000; }
+.tooltip.bottom-right .tooltip-arrow {
+  top: 0;
+  right: 5px;
+  border-width: 0 5px 5px;
+  border-bottom-color: #000; }
+
+.popover {
+  position: absolute;
+  top: 0;
+  left: 0;
+  z-index: 1060;
+  display: none;
+  max-width: 276px;
+  padding: 1px;
+  text-align: left;
+  background-color: #fff;
+  background-clip: padding-box;
+  border: 1px solid #ccc;
+  border: 1px solid rgba(0, 0, 0, 0.2);
+  border-radius: 6px;
+  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
+  white-space: normal; }
+  .popover.top {
+    margin-top: -10px; }
+  .popover.right {
+    margin-left: 10px; }
+  .popover.bottom {
+    margin-top: 10px; }
+  .popover.left {
+    margin-left: -10px; }
+
+.popover-title {
+  margin: 0;
+  padding: 8px 14px;
+  font-size: 14px;
+  font-weight: normal;
+  line-height: 18px;
+  background-color: #f7f7f7;
+  border-bottom: 1px solid #ebebeb;
+  border-radius: 5px 5px 0 0; }
+
+.popover-content {
+  padding: 9px 14px; }
+
+.popover > .arrow, .popover > .arrow:after {
+  position: absolute;
+  display: block;
+  width: 0;
+  height: 0;
+  border-color: transparent;
+  border-style: solid; }
+
+.popover > .arrow {
+  border-width: 11px; }
+
+.popover > .arrow:after {
+  border-width: 10px;
+  content: ""; }
+
+.popover.top > .arrow {
+  left: 50%;
+  margin-left: -11px;
+  border-bottom-width: 0;
+  border-top-color: #999999;
+  border-top-color: rgba(0, 0, 0, 0.05);
+  bottom: -11px; }
+  .popover.top > .arrow:after {
+    content: " ";
+    bottom: 1px;
+    margin-left: -10px;
+    border-bottom-width: 0;
+    border-top-color: #fff; }
+.popover.right > .arrow {
+  top: 50%;
+  left: -11px;
+  margin-top: -11px;
+  border-left-width: 0;
+  border-right-color: #999999;
+  border-right-color: rgba(0, 0, 0, 0.05); }
+  .popover.right > .arrow:after {
+    content: " ";
+    left: 1px;
+    bottom: -10px;
+    border-left-width: 0;
+    border-right-color: #fff; }
+.popover.bottom > .arrow {
+  left: 50%;
+  margin-left: -11px;
+  border-top-width: 0;
+  border-bottom-color: #999999;
+  border-bottom-color: rgba(0, 0, 0, 0.05);
+  top: -11px; }
+  .popover.bottom > .arrow:after {
+    content: " ";
+    top: 1px;
+    margin-left: -10px;
+    border-top-width: 0;
+    border-bottom-color: #fff; }
+.popover.left > .arrow {
+  top: 50%;
+  right: -11px;
+  margin-top: -11px;
+  border-right-width: 0;
+  border-left-color: #999999;
+  border-left-color: rgba(0, 0, 0, 0.05); }
+  .popover.left > .arrow:after {
+    content: " ";
+    right: 1px;
+    border-right-width: 0;
+    border-left-color: #fff;
+    bottom: -10px; }
+
+.carousel {
+  position: relative; }
+
+.carousel-inner {
+  position: relative;
+  overflow: hidden;
+  width: 100%; }
+  .carousel-inner > .item {
+    display: none;
+    position: relative;
+    transition: 0.6s ease-in-out left; }
+    .carousel-inner > .item > img, .carousel-inner > .item > a > img {
+      display: block;
+      max-width: 100%;
+      height: auto;
+      line-height: 1; }
+  .carousel-inner > .active, .carousel-inner > .next, .carousel-inner > .prev {
+    display: block; }
+  .carousel-inner > .active {
+    left: 0; }
+  .carousel-inner > .next, .carousel-inner > .prev {
+    position: absolute;
+    top: 0;
+    width: 100%; }
+  .carousel-inner > .next {
+    left: 100%; }
+  .carousel-inner > .prev {
+    left: -100%; }
+  .carousel-inner > .next.left, .carousel-inner > .prev.right {
+    left: 0; }
+  .carousel-inner > .active.left {
+    left: -100%; }
+  .carousel-inner > .active.right {
+    left: 100%; }
+
+.carousel-control {
+  position: absolute;
+  top: 0;
+  left: 0;
+  bottom: 0;
+  width: 15%;
+  opacity: 0.5;
+  filter: alpha(opacity=50);
+  font-size: 20px;
+  color: #fff;
+  text-align: center;
+  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6); }
+  .carousel-control.left {
+    background-image: linear-gradient(to right, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0.0001) 100%);
+    background-repeat: repeat-x;
+    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#80000000', endColorstr='#00000000', GradientType=1); }
+  .carousel-control.right {
+    left: auto;
+    right: 0;
+    background-image: linear-gradient(to right, rgba(0, 0, 0, 0.0001) 0%, rgba(0, 0, 0, 0.5) 100%);
+    background-repeat: repeat-x;
+    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#00000000', endColorstr='#80000000', GradientType=1); }
+  .carousel-control:hover, .carousel-control:focus {
+    outline: 0;
+    color: #fff;
+    text-decoration: none;
+    opacity: 0.9;
+    filter: alpha(opacity=90); }
+  .carousel-control .icon-prev, .carousel-control .icon-next, .carousel-control .glyphicon-chevron-left, .carousel-control .glyphicon-chevron-right {
+    position: absolute;
+    top: 50%;
+    z-index: 5;
+    display: inline-block; }
+  .carousel-control .icon-prev, .carousel-control .glyphicon-chevron-left {
+    left: 50%;
+    margin-left: -10px; }
+  .carousel-control .icon-next, .carousel-control .glyphicon-chevron-right {
+    right: 50%;
+    margin-right: -10px; }
+  .carousel-control .icon-prev, .carousel-control .icon-next {
+    width: 20px;
+    height: 20px;
+    margin-top: -10px;
+    font-family: serif; }
+  .carousel-control .icon-prev:before {
+    content: '\2039'; }
+  .carousel-control .icon-next:before {
+    content: '\203a'; }
+
+.carousel-indicators {
+  position: absolute;
+  bottom: 10px;
+  left: 50%;
+  z-index: 15;
+  width: 60%;
+  margin-left: -30%;
+  padding-left: 0;
+  list-style: none;
+  text-align: center; }
+  .carousel-indicators li {
+    display: inline-block;
+    width: 10px;
+    height: 10px;
+    margin: 1px;
+    text-indent: -999px;
+    border: 1px solid #fff;
+    border-radius: 10px;
+    cursor: pointer;
+    background-color: #000 \9;
+    background-color: rgba(0, 0, 0, 0); }
+  .carousel-indicators .active {
+    margin: 0;
+    width: 12px;
+    height: 12px;
+    background-color: #fff; }
+
+.carousel-caption {
+  position: absolute;
+  left: 15%;
+  right: 15%;
+  bottom: 20px;
+  z-index: 10;
+  padding-top: 20px;
+  padding-bottom: 20px;
+  color: #fff;
+  text-align: center;
+  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6); }
+  .carousel-caption .btn {
+    text-shadow: none; }
+
+@media screen and (min-width: 768px) {
+  .carousel-control .glyphicon-chevron-left, .carousel-control .glyphicon-chevron-right, .carousel-control .icon-prev, .carousel-control .icon-next {
+    width: 30px;
+    height: 30px;
+    margin-top: -15px;
+    font-size: 30px; }
+  .carousel-control .glyphicon-chevron-left, .carousel-control .icon-prev {
+    margin-left: -15px; }
+  .carousel-control .glyphicon-chevron-right, .carousel-control .icon-next {
+    margin-right: -15px; }
+  .carousel-caption {
+    left: 20%;
+    right: 20%;
+    padding-bottom: 30px; }
+  .carousel-indicators {
+    bottom: 20px; } }
+
+.clearfix:before, .clearfix:after {
+  content: " ";
+  display: table; }
+.clearfix:after {
+  clear: both; }
+
+.center-block {
+  display: block;
+  margin-left: auto;
+  margin-right: auto; }
+
+.pull-right {
+  float: right !important; }
+
+.pull-left {
+  float: left !important; }
+
+.hide {
+  display: none !important; }
+
+.show {
+  display: block !important; }
+
+.invisible {
+  visibility: hidden; }
+
+.text-hide {
+  font: 0/0 a;
+  color: transparent;
+  text-shadow: none;
+  background-color: transparent;
+  border: 0; }
+
+.hidden {
+  display: none !important;
+  visibility: hidden !important; }
+
+.affix {
+  position: fixed; }
+
+@-ms-viewport {
+  width: device-width; }
+
+.visible-xs, .visible-sm, .visible-md, .visible-lg {
+  display: none !important; }
+
+.visible-xs-block, .visible-xs-inline, .visible-xs-inline-block, .visible-sm-block, .visible-sm-inline, .visible-sm-inline-block, .visible-md-block, .visible-md-inline, .visible-md-inline-block, .visible-lg-block, .visible-lg-inline, .visible-lg-inline-block {
+  display: none !important; }
+
+@media (max-width: 767px) {
+  .visible-xs {
+    display: block !important; }
+  table.visible-xs {
+    display: table; }
+  tr.visible-xs {
+    display: table-row !important; }
+  th.visible-xs, td.visible-xs {
+    display: table-cell !important; } }
+
+@media (max-width: 767px) {
+  .visible-xs-block {
+    display: block !important; } }
+
+@media (max-width: 767px) {
+  .visible-xs-inline {
+    display: inline !important; } }
+
+@media (max-width: 767px) {
+  .visible-xs-inline-block {
+    display: inline-block !important; } }
+
+@media (min-width: 768px) and (max-width: 991px) {
+  .visible-sm {
+    display: block !important; }
+  table.visible-sm {
+    display: table; }
+  tr.visible-sm {
+    display: table-row !important; }
+  th.visible-sm, td.visible-sm {
+    display: table-cell !important; } }
+
+@media (min-width: 768px) and (max-width: 991px) {
+  .visible-sm-block {
+    display: block !important; } }
+
+@media (min-width: 768px) and (max-width: 991px) {
+  .visible-sm-inline {
+    display: inline !important; } }
+
+@media (min-width: 768px) and (max-width: 991px) {
+  .visible-sm-inline-block {
+    display: inline-block !important; } }
+
+@media (min-width: 992px) and (max-width: 1199px) {
+  .visible-md {
+    display: block !important; }
+  table.visible-md {
+    display: table; }
+  tr.visible-md {
+    display: table-row !important; }
+  th.visible-md, td.visible-md {
+    display: table-cell !important; } }
+
+@media (min-width: 992px) and (max-width: 1199px) {
+  .visible-md-block {
+    display: block !important; } }
+
+@media (min-width: 992px) and (max-width: 1199px) {
+  .visible-md-inline {
+    display: inline !important; } }
+
+@media (min-width: 992px) and (max-width: 1199px) {
+  .visible-md-inline-block {
+    display: inline-block !important; } }
+
+@media (min-width: 1200px) {
+  .visible-lg {
+    display: block !important; }
+  table.visible-lg {
+    display: table; }
+  tr.visible-lg {
+    display: table-row !important; }
+  th.visible-lg, td.visible-lg {
+    display: table-cell !important; } }
+
+@media (min-width: 1200px) {
+  .visible-lg-block {
+    display: block !important; } }
+
+@media (min-width: 1200px) {
+  .visible-lg-inline {
+    display: inline !important; } }
+
+@media (min-width: 1200px) {
+  .visible-lg-inline-block {
+    display: inline-block !important; } }
+
+@media (max-width: 767px) {
+  .hidden-xs {
+    display: none !important; } }
+
+@media (min-width: 768px) and (max-width: 991px) {
+  .hidden-sm {
+    display: none !important; } }
+
+@media (min-width: 992px) and (max-width: 1199px) {
+  .hidden-md {
+    display: none !important; } }
+
+@media (min-width: 1200px) {
+  .hidden-lg {
+    display: none !important; } }
+
+.visible-print {
+  display: none !important; }
+
+@media print {
+  .visible-print {
+    display: block !important; }
+  table.visible-print {
+    display: table; }
+  tr.visible-print {
+    display: table-row !important; }
+  th.visible-print, td.visible-print {
+    display: table-cell !important; } }
+
+.visible-print-block {
+  display: none !important; }
+  @media print {
+    .visible-print-block {
+      display: block !important; } }
+
+.visible-print-inline {
+  display: none !important; }
+  @media print {
+    .visible-print-inline {
+      display: inline !important; } }
+
+.visible-print-inline-block {
+  display: none !important; }
+  @media print {
+    .visible-print-inline-block {
+      display: inline-block !important; } }
+
+@media print {
+  .hidden-print {
+    display: none !important; } }
+
+.browsehappy {
+  margin: 0.2em 0;
+  background: #ccc;
+  color: #000;
+  padding: 0.2em 0; }
+
+/* Space out content a bit */
+body {
+  padding-top: 20px;
+  padding-bottom: 20px; }
+
+/* Everything but the jumbotron gets side spacing for mobile first views */
+.header, .marketing, .footer {
+  padding-left: 15px;
+  padding-right: 15px; }
+
+/* Custom page header */
+.header {
+  border-bottom: 1px solid #e5e5e5;
+  /* Make the masthead heading the same height as the navigation */ }
+  .header h3 {
+    margin-top: 0;
+    margin-bottom: 0;
+    line-height: 40px;
+    padding-bottom: 19px; }
+
+/* Custom page footer */
+.footer {
+  padding-top: 19px;
+  color: #777;
+  border-top: 1px solid #e5e5e5; }
+
+.container-narrow > hr {
+  margin: 30px 0; }
+
+/* Main marketing message and sign up button */
+.jumbotron {
+  text-align: center;
+  border-bottom: 1px solid #e5e5e5; }
+  .jumbotron .btn {
+    font-size: 21px;
+    padding: 14px 24px; }
+
+/* Supporting marketing content */
+.marketing {
+  margin: 40px 0; }
+  .marketing p + h4 {
+    margin-top: 28px; }
+
+/* Responsive: Portrait tablets and up */
+@media screen and (min-width: 768px) {
+  /* Remove the padding we set earlier */
+  /* Space out the masthead */
+  /* Remove the bottom border on the jumbotron for visual effect */
+  .container {
+    max-width: 730px; }
+  .header, .marketing, .footer {
+    padding-left: 0;
+    padding-right: 0; }
+  .header {
+    margin-bottom: 30px; }
+  .jumbotron {
+    border-bottom: 300; } }
+
+/*# sourceMappingURL=data:application/json;base64,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 */
diff --git a/devtools/client/styleeditor/test/sourcemap-css/test-stylus.css b/devtools/client/styleeditor/test/sourcemap-css/test-stylus.css
new file mode 100644
index 0000000000..0ec51da3b7
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-css/test-stylus.css
@@ -0,0 +1,7 @@
+div {
+  color: #f06;
+}
+span {
+  background-color: #eee;
+}
+/*# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3Qtc3R5bHVzLnN0eWwiXSwibmFtZXMiOltdLCJtYXBwaW5ncyI6IkFBRUE7RUFDRSxPQUFPLEtBQVA7O0FBRUY7RUFDRSxrQkFBa0IsS0FBbEIiLCJmaWxlIjoidGVzdC1zdHlsdXMuY3NzIiwic291cmNlc0NvbnRlbnQiOlsicGF1bHJvdWdldHBpbmsgPSAjZjA2O1xuXG5kaXZcbiAgY29sb3I6IHBhdWxyb3VnZXRwaW5rXG5cbnNwYW5cbiAgYmFja2dyb3VuZC1jb2xvcjogI0VFRVxuIl19 */
\ No newline at end of file
diff --git a/devtools/client/styleeditor/test/sourcemap-sass/media-rules.scss b/devtools/client/styleeditor/test/sourcemap-sass/media-rules.scss
new file mode 100644
index 0000000000..4f1c8f216f
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-sass/media-rules.scss
@@ -0,0 +1,11 @@
+$break-small: 320px;
+$break-large: 1200px;
+
+div {
+  @media screen and (max-width: $break-small) {
+    width: 100px;
+  }
+  @media screen and (min-width: $break-large) {
+    width: 400px;
+  }
+}
diff --git a/devtools/client/styleeditor/test/sourcemap-sass/sourcemaps.scss b/devtools/client/styleeditor/test/sourcemap-sass/sourcemaps.scss
new file mode 100644
index 0000000000..0ff6c471bb
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-sass/sourcemaps.scss
@@ -0,0 +1,10 @@
+
+$paulrougetpink: #f06;
+
+div {
+  color: $paulrougetpink;
+}
+
+span {
+  background-color: #EEE;
+}
\ No newline at end of file
diff --git a/devtools/client/styleeditor/test/sourcemap-sass/sourcemaps.scss^headers^ b/devtools/client/styleeditor/test/sourcemap-sass/sourcemaps.scss^headers^
new file mode 100644
index 0000000000..866f3e2fb0
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-sass/sourcemaps.scss^headers^
@@ -0,0 +1,2 @@
+X-Content-Type-Options: nosniff
+Content-Type: text/plain
diff --git a/devtools/client/styleeditor/test/sourcemap-styl/test-stylus.styl b/devtools/client/styleeditor/test/sourcemap-styl/test-stylus.styl
new file mode 100644
index 0000000000..76ff25c29e
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemap-styl/test-stylus.styl
@@ -0,0 +1,7 @@
+paulrougetpink = #f06;
+
+div
+  color: paulrougetpink
+
+span
+  background-color: #EEE
\ No newline at end of file
diff --git a/devtools/client/styleeditor/test/sourcemaps-inline.html b/devtools/client/styleeditor/test/sourcemaps-inline.html
new file mode 100644
index 0000000000..45846fe289
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemaps-inline.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>testcase for testing CSS source maps in inline style</title>
+  <style type="text/css">body {
+  background-color: black;
+}
+body > h1 {
+  color: white;
+}
+/*# sourceMappingURL=data:application/json;base64,ewoidmVyc2lvbiI6IDMsCiJtYXBwaW5ncyI6ICJBQUFBLElBQUs7RUFDSCxnQkFBZ0IsRUFBRSxLQUFLO0VBQ3ZCLFNBQU87SUFDTCxLQUFLLEVBQUUsS0FBSyIsCiJzb3VyY2VzIjogWyJ0ZXN0LnNjc3MiXSwKInNvdXJjZXNDb250ZW50IjogWyJib2R5IHtcbiAgYmFja2dyb3VuZC1jb2xvcjogYmxhY2s7XG4gICYgPiBoMSB7XG4gICAgY29sb3I6IHdoaXRlO1xuICB9XG59XG4iXSwKIm5hbWVzIjogW10sCiJmaWxlIjogInRlc3QuY3NzIgp9Cg== */</style>
+</head>
+<body>
+  <h1>Source maps testcase</div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/sourcemaps-large.html b/devtools/client/styleeditor/test/sourcemaps-large.html
new file mode 100644
index 0000000000..b8c92e0c9e
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemaps-large.html
@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="UTF-8">
+  <title>testcase for a loading error with CSS source maps</title>
+  <link rel="stylesheet" type="text/css" href="sourcemap-css/test-bootstrap-scss.css"/>
+</head>
+<body>
+  <div>source maps <span>testcase</span> (see Bug 1128747)</div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/sourcemaps-watching.html b/devtools/client/styleeditor/test/sourcemaps-watching.html
new file mode 100644
index 0000000000..fc9909ea57
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemaps-watching.html
@@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+<head>
+  <title>testcase for testing CSS source maps</title>
+  <link rel="stylesheet" type="text/css" href="simple.css"/>
+  <link rel="stylesheet" type="text/css" href="sourcemap-css/sourcemaps.css?test=1"/>
+</head>
+<body>
+  <div>source maps <span>testcase</span></div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/sourcemaps.html b/devtools/client/styleeditor/test/sourcemaps.html
new file mode 100644
index 0000000000..887e0ed989
--- /dev/null
+++ b/devtools/client/styleeditor/test/sourcemaps.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<html>
+<head>
+  <title>testcase for testing CSS source maps</title>
+  <link rel="stylesheet" type="text/css" href="simple.css"/>
+  <link rel="stylesheet" type="text/css" href="sourcemap-css/sourcemaps.css?test=1"/>
+  <link rel="stylesheet" type="text/css" href="sourcemap-css/contained.css"/>
+  <link rel="stylesheet" type="text/css" href="sourcemap-css/test-stylus.css"/>
+</head>
+<body>
+  <div>source maps <span>testcase</span></div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/sync.html b/devtools/client/styleeditor/test/sync.html
new file mode 100644
index 0000000000..83da8c57e9
--- /dev/null
+++ b/devtools/client/styleeditor/test/sync.html
@@ -0,0 +1,20 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>simple testcase</title>
+  <style type="text/css">
+  body {
+    border-width: 15px;
+    color: red;
+  }
+
+  #testid {
+    font-size: 4em;
+  }
+  </style>
+</head>
+<body>
+	<div id="testid">simple testcase</div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/sync_with_csp.css b/devtools/client/styleeditor/test/sync_with_csp.css
new file mode 100644
index 0000000000..18f1b89682
--- /dev/null
+++ b/devtools/client/styleeditor/test/sync_with_csp.css
@@ -0,0 +1,10 @@
+
+  body {
+    border-width: 15px;
+    color: red;
+  }
+
+  #testid {
+    font-size: 4em;
+  }
+  
\ No newline at end of file
diff --git a/devtools/client/styleeditor/test/sync_with_csp.html b/devtools/client/styleeditor/test/sync_with_csp.html
new file mode 100644
index 0000000000..cdab014f59
--- /dev/null
+++ b/devtools/client/styleeditor/test/sync_with_csp.html
@@ -0,0 +1,12 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <meta http-equiv="Content-Security-Policy" content="style-src *">
+  <title>simple testcase with content security policy</title>
+  <link rel="stylesheet" type="text/css" href="sync_with_csp.css" />
+</head>
+<body>
+	<div id="testid">simple testcase with content security policy</div>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/test_private.css b/devtools/client/styleeditor/test/test_private.css
new file mode 100644
index 0000000000..e8f24f94a3
--- /dev/null
+++ b/devtools/client/styleeditor/test/test_private.css
@@ -0,0 +1,3 @@
+body {
+    background-color: red;
+}
diff --git a/devtools/client/styleeditor/test/test_private.html b/devtools/client/styleeditor/test/test_private.html
new file mode 100644
index 0000000000..bfde3520ef
--- /dev/null
+++ b/devtools/client/styleeditor/test/test_private.html
@@ -0,0 +1,7 @@
+<html>
+<head>
+<link rel="stylesheet" href="test_private.css"></link>
+</head>
+<body>
+</body>
+</html>
diff --git a/devtools/client/styleeditor/test/utf-16.css b/devtools/client/styleeditor/test/utf-16.css
new file mode 100644
index 0000000000..92ff5eac53
--- /dev/null
+++ b/devtools/client/styleeditor/test/utf-16.css
diff --git a/devtools/client/styleeditor/test/veryveryverylongnamethatcanbreakthestyleeditor.css b/devtools/client/styleeditor/test/veryveryverylongnamethatcanbreakthestyleeditor.css
new file mode 100644
index 0000000000..4d737f305e
--- /dev/null
+++ b/devtools/client/styleeditor/test/veryveryverylongnamethatcanbreakthestyleeditor.css
@@ -0,0 +1,7 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* ☺ */
+
+body {
+  margin: 0;
+}