diff --git a/browser/devtools/performance/modules/logic/marker-utils.js b/browser/devtools/performance/modules/logic/marker-utils.js
index 43608eaac9df..55a4edbe20cf 100644
--- a/browser/devtools/performance/modules/logic/marker-utils.js
+++ b/browser/devtools/performance/modules/logic/marker-utils.js
@@ -8,7 +8,7 @@
  * and parsing out the blueprint to generate correct values for markers.
  */
 
-const { Ci } = require("chrome");
+const { Cu, Ci } = require("chrome");
 
 loader.lazyRequireGetter(this, "L10N",
   "devtools/performance/global", true);
@@ -22,6 +22,18 @@ loader.lazyRequireGetter(this, "WebConsoleUtils",
 // String used to fill in platform data when it should be hidden.
 const GECKO_SYMBOL = "(Gecko)";
 
+/**
+ * Takes a marker, blueprint, and filter list and
+ * determines if this marker should be filtered or not.
+ */
+function isMarkerValid (marker, filter) {
+  let isUnknown = !(marker.name in TIMELINE_BLUEPRINT);
+  if (isUnknown) {
+    return filter.indexOf("UNKNOWN") === -1;
+  }
+  return filter.indexOf(marker.name) === -1;
+}
+
 /**
  * Returns the correct label to display for passed in marker, based
  * off of the blueprints.
@@ -30,7 +42,7 @@ const GECKO_SYMBOL = "(Gecko)";
  * @return {string}
  */
 function getMarkerLabel (marker) {
-  let blueprint = TIMELINE_BLUEPRINT[marker.name];
+  let blueprint = getBlueprintFor(marker);
   // Either use the label function in the blueprint, or use it directly
   // as a string.
   return typeof blueprint.label === "function" ? blueprint.label(marker) : blueprint.label;
@@ -44,7 +56,7 @@ function getMarkerLabel (marker) {
  * @return {string}
  */
 function getMarkerClassName (type) {
-  let blueprint = TIMELINE_BLUEPRINT[type];
+  let blueprint = getBlueprintFor({ name: type });
   // Either use the label function in the blueprint, or use it directly
   // as a string.
   let className = typeof blueprint.label === "function" ? blueprint.label() : blueprint.label;
@@ -72,7 +84,7 @@ function getMarkerClassName (type) {
  * @return {Array<object>}
  */
 function getMarkerFields (marker) {
-  let blueprint = TIMELINE_BLUEPRINT[marker.name];
+  let blueprint = getBlueprintFor(marker);
 
   // If blueprint.fields is a function, use that
   if (typeof blueprint.fields === "function") {
@@ -111,7 +123,7 @@ const DOM = {
    * @return {Array<Element>}
    */
   buildFields: function (doc, marker) {
-    let blueprint = TIMELINE_BLUEPRINT[marker.name];
+    let blueprint = getBlueprintFor(marker);
     let fields = getMarkerFields(marker);
 
     return fields.map(({ label, value }) => DOM.buildNameValueLabel(doc, label, value));
@@ -125,7 +137,7 @@ const DOM = {
    * @return {Element}
    */
   buildTitle: function (doc, marker) {
-    let blueprint = TIMELINE_BLUEPRINT[marker.name];
+    let blueprint = getBlueprintFor(marker);
 
     let hbox = doc.createElement("hbox");
     hbox.setAttribute("align", "center");
@@ -377,6 +389,14 @@ const JS_MARKER_MAP = {
  * A series of formatters used by the blueprint.
  */
 const Formatters = {
+  /**
+   * Uses the marker name as the label for markers that do not have
+   * a blueprint entry. Uses "Other" in the marker filter menu.
+   */
+  UnknownLabel: function (marker={}) {
+    return marker.name || L10N.getStr("timeline.label.unknown");
+  },
+
   GCLabel: function (marker={}) {
     let label = L10N.getStr("timeline.label.garbageCollection");
     // Only if a `nonincrementalReason` exists, do we want to label
@@ -444,9 +464,22 @@ const Formatters = {
   },
 };
 
+/**
+ * Takes a marker and returns the definition for that marker type,
+ * falling back to the UNKNOWN definition if undefined.
+ *
+ * @param {Marker} marker
+ * @return {object}
+ */
+function getBlueprintFor (marker) {
+  return TIMELINE_BLUEPRINT[marker.name] || TIMELINE_BLUEPRINT.UNKNOWN;
+}
+
+exports.isMarkerValid = isMarkerValid;
 exports.getMarkerLabel = getMarkerLabel;
 exports.getMarkerClassName = getMarkerClassName;
 exports.getMarkerFields = getMarkerFields;
 exports.DOM = DOM;
 exports.CollapseFunctions = CollapseFunctions;
 exports.Formatters = Formatters;
+exports.getBlueprintFor = getBlueprintFor;
diff --git a/browser/devtools/performance/modules/logic/recording-utils.js b/browser/devtools/performance/modules/logic/recording-utils.js
index af7f7fc3d563..5569d99b0750 100644
--- a/browser/devtools/performance/modules/logic/recording-utils.js
+++ b/browser/devtools/performance/modules/logic/recording-utils.js
@@ -196,55 +196,6 @@ function getProfileThreadFromAllocations(allocations) {
   return thread;
 }
 
-/**
- * Gets the current timeline blueprint without the hidden markers.
- *
- * @param blueprint
- *        The default timeline blueprint.
- * @param array hiddenMarkers
- *        A list of hidden markers' names.
- * @return object
- *         The filtered timeline blueprint.
- */
-function getFilteredBlueprint({ blueprint, hiddenMarkers }) {
-  // Clone functions here just to prevent an error, as the blueprint
-  // contains functions (even though we do not use them).
-  let filteredBlueprint = Cu.cloneInto(blueprint, {}, { cloneFunctions: true });
-  let maybeRemovedGroups = new Set();
-  let removedGroups = new Set();
-
-  // 1. Remove hidden markers from the blueprint.
-
-  for (let hiddenMarkerName of hiddenMarkers) {
-    maybeRemovedGroups.add(filteredBlueprint[hiddenMarkerName].group);
-    delete filteredBlueprint[hiddenMarkerName];
-  }
-
-  // 2. Get a list of all the groups that will be removed.
-
-  for (let maybeRemovedGroup of maybeRemovedGroups) {
-    let markerNames = Object.keys(filteredBlueprint);
-    let isGroupRemoved = markerNames.every(e => filteredBlueprint[e].group != maybeRemovedGroup);
-    if (isGroupRemoved) {
-      removedGroups.add(maybeRemovedGroup);
-    }
-  }
-
-  // 3. Offset groups so that their indices are consecutive.
-
-  for (let removedGroup of removedGroups) {
-    let markerNames = Object.keys(filteredBlueprint);
-    for (let markerName of markerNames) {
-      let markerDetails = filteredBlueprint[markerName];
-      if (markerDetails.group > removedGroup) {
-        markerDetails.group--;
-      }
-    }
-  }
-
-  return filteredBlueprint;
-};
-
 /**
  * Deduplicates a profile by deduplicating stacks, frames, and strings.
  *
@@ -571,7 +522,6 @@ exports.offsetSampleTimes = offsetSampleTimes;
 exports.offsetMarkerTimes = offsetMarkerTimes;
 exports.offsetAndScaleTimestamps = offsetAndScaleTimestamps;
 exports.getProfileThreadFromAllocations = getProfileThreadFromAllocations;
-exports.getFilteredBlueprint = getFilteredBlueprint;
 exports.deflateProfile = deflateProfile;
 exports.deflateThread = deflateThread;
 exports.UniqueStrings = UniqueStrings;
diff --git a/browser/devtools/performance/modules/logic/waterfall-utils.js b/browser/devtools/performance/modules/logic/waterfall-utils.js
index d2228fb43061..b1bf06f654dd 100644
--- a/browser/devtools/performance/modules/logic/waterfall-utils.js
+++ b/browser/devtools/performance/modules/logic/waterfall-utils.js
@@ -7,27 +7,25 @@
  * Utility functions for collapsing markers into a waterfall.
  */
 
-loader.lazyRequireGetter(this, "TIMELINE_BLUEPRINT",
-  "devtools/performance/markers", true);
+loader.lazyRequireGetter(this, "getBlueprintFor",
+  "devtools/performance/marker-utils", true);
 
 /**
  * Collapses markers into a tree-like structure.
  * @param object markerNode
  * @param array markersList
- * @param ?object blueprint
  */
-function collapseMarkersIntoNode({ markerNode, markersList, blueprint }) {
+function collapseMarkersIntoNode({ markerNode, markersList }) {
   let { getCurrentParentNode, collapseMarker, addParentNode, popParentNode } = createParentNodeFactory(markerNode);
-  blueprint = blueprint || TIMELINE_BLUEPRINT;
 
   for (let i = 0, len = markersList.length; i < len; i++) {
     let curr = markersList[i];
 
     let parentNode = getCurrentParentNode();
-    let def = blueprint[curr.name];
-    let collapse = def.collapseFunc || (() => null);
+    let blueprint = getBlueprintFor(curr);
+
+    let collapse = blueprint.collapseFunc || (() => null);
     let peek = distance => markersList[i + distance];
-    let foundParent = false;
 
     let collapseInfo = collapse(parentNode, curr, peek);
     if (collapseInfo) {
diff --git a/browser/devtools/performance/modules/markers.js b/browser/devtools/performance/modules/markers.js
index 984eb4aa79bc..177a4d4fb6f0 100644
--- a/browser/devtools/performance/modules/markers.js
+++ b/browser/devtools/performance/modules/markers.js
@@ -55,6 +55,16 @@ const { Formatters, CollapseFunctions: collapse } = require("devtools/performanc
  * updated as well.
  */
 const TIMELINE_BLUEPRINT = {
+  /* Default definition used for markers that occur but
+   * are not defined here. Should ultimately be defined, but this gives
+   * us room to work on the front end separately from the platform. */
+  "UNKNOWN": {
+    group: 2,
+    colorName: "graphs-grey",
+    collapseFunc: collapse.child,
+    label: Formatters.UnknownLabel
+  },
+
   /* Group 0 - Reflow and Rendering pipeline */
   "Styles": {
     group: 0,
@@ -131,7 +141,7 @@ const TIMELINE_BLUEPRINT = {
   /* Group 2 - User Controlled */
   "ConsoleTime": {
     group: 2,
-    colorName: "graphs-grey",
+    colorName: "graphs-blue",
     label: sublabelForProperty(L10N.getStr("timeline.label.consoleTime"), "causeName"),
     fields: [{
       property: "causeName",
diff --git a/browser/devtools/performance/modules/widgets/graphs.js b/browser/devtools/performance/modules/widgets/graphs.js
index 468ab8dd7e49..bb5b50b126fe 100644
--- a/browser/devtools/performance/modules/widgets/graphs.js
+++ b/browser/devtools/performance/modules/widgets/graphs.js
@@ -135,8 +135,8 @@ MemoryGraph.prototype = Heritage.extend(PerformanceGraph.prototype, {
   }
 });
 
-function TimelineGraph(parent, blueprint) {
-  MarkersOverview.call(this, parent, blueprint);
+function TimelineGraph(parent, filter) {
+  MarkersOverview.call(this, parent, filter);
 }
 
 TimelineGraph.prototype = Heritage.extend(MarkersOverview.prototype, {
@@ -163,7 +163,6 @@ const GRAPH_DEFINITIONS = {
   timeline: {
     constructor: TimelineGraph,
     selector: "#markers-overview",
-    needsBlueprints: true,
     primaryLink: true
   }
 };
@@ -174,15 +173,15 @@ const GRAPH_DEFINITIONS = {
  *
  * @param {object} definition
  * @param {DOMElement} root
- * @param {function} getBlueprint
+ * @param {function} getFilter
  * @param {function} getTheme
  */
-function GraphsController ({ definition, root, getBlueprint, getTheme }) {
+function GraphsController ({ definition, root, getFilter, getTheme }) {
   this._graphs = {};
   this._enabled = new Set();
   this._definition = definition || GRAPH_DEFINITIONS;
   this._root = root;
-  this._getBlueprint = getBlueprint;
+  this._getFilter = getFilter;
   this._getTheme = getTheme;
   this._primaryLink = Object.keys(this._definition).filter(name => this._definition[name].primaryLink)[0];
   this.$ = root.ownerDocument.querySelector.bind(root.ownerDocument);
@@ -369,8 +368,8 @@ GraphsController.prototype = {
   _construct: Task.async(function *(graphName) {
     let def = this._definition[graphName];
     let el = this.$(def.selector);
-    let blueprint = def.needsBlueprints ? this._getBlueprint() : void 0;
-    let graph = this._graphs[graphName] = new def.constructor(el, blueprint);
+    let filter = this._getFilter();
+    let graph = this._graphs[graphName] = new def.constructor(el, filter);
     graph.graphName = graphName;
 
     yield graph.ready();
diff --git a/browser/devtools/performance/modules/widgets/marker-details.js b/browser/devtools/performance/modules/widgets/marker-details.js
index 5772ace46882..12780ea2a346 100644
--- a/browser/devtools/performance/modules/widgets/marker-details.js
+++ b/browser/devtools/performance/modules/widgets/marker-details.js
@@ -13,8 +13,6 @@ loader.lazyRequireGetter(this, "EventEmitter",
   "devtools/toolkit/event-emitter");
 loader.lazyRequireGetter(this, "L10N",
   "devtools/performance/global", true);
-loader.lazyRequireGetter(this, "TIMELINE_BLUEPRINT",
-  "devtools/performance/markers", true);
 loader.lazyRequireGetter(this, "MarkerUtils",
   "devtools/performance/marker-utils");
 
diff --git a/browser/devtools/performance/modules/widgets/marker-view.js b/browser/devtools/performance/modules/widgets/marker-view.js
index 7a33eecafd69..4f8d1058ce52 100644
--- a/browser/devtools/performance/modules/widgets/marker-view.js
+++ b/browser/devtools/performance/modules/widgets/marker-view.js
@@ -11,11 +11,10 @@
 const { Cc, Ci, Cu, Cr } = require("chrome");
 const { Heritage } = require("resource:///modules/devtools/ViewHelpers.jsm");
 const { AbstractTreeItem } = require("resource:///modules/devtools/AbstractTreeItem.jsm");
-const { TIMELINE_BLUEPRINT: ORIGINAL_BP } = require("devtools/performance/markers");
-
 loader.lazyRequireGetter(this, "MarkerUtils",
   "devtools/performance/marker-utils");
 
+
 const HTML_NS = "http://www.w3.org/1999/xhtml";
 
 const LEVEL_INDENT = 10; // px
@@ -60,15 +59,14 @@ MarkerView.prototype = Heritage.extend(AbstractTreeItem.prototype, {
   },
 
   /**
-   * Sets a list of names and colors used to paint markers.
-   * @see TIMELINE_BLUEPRINT in timeline/widgets/global.js
-   * @param object blueprint
+   * Sets a list of marker types to be filtered out of this view.
+   * @param Array<String> filter
    */
-  set blueprint(blueprint) {
-    this.root._blueprint = blueprint;
+  set filter(filter) {
+    this.root._filter = filter;
   },
-  get blueprint() {
-    return this.root._blueprint;
+  get filter() {
+    return this.root._filter;
   },
 
   /**
@@ -139,7 +137,6 @@ MarkerView.prototype = Heritage.extend(AbstractTreeItem.prototype, {
     if (!submarkers || !submarkers.length) {
       return;
     }
-    let blueprint = this.root._blueprint;
     let startTime = this.root._interval.startTime;
     let endTime = this.root._interval.endTime;
     let newLevel = this.level + 1;
@@ -147,17 +144,15 @@ MarkerView.prototype = Heritage.extend(AbstractTreeItem.prototype, {
     for (let i = 0, len = submarkers.length; i < len; i++) {
       let marker = submarkers[i];
 
-      // If this marker isn't in the global timeline blueprint, don't display
-      // it, but dump a warning message to the console.
-      if (!(marker.name in blueprint)) {
-        if (!(marker.name in ORIGINAL_BP)) {
-          console.warn(`Marker not found in timeline blueprint: ${marker.name}.`);
-        }
+      // Skip filtered markers
+      if (!MarkerUtils.isMarkerValid(marker, this.filter)) {
         continue;
       }
+
       if (!isMarkerInRange(marker, startTime|0, endTime|0)) {
         continue;
       }
+
       children.push(new MarkerView({
         owner: this,
         marker: marker,
@@ -175,15 +170,12 @@ MarkerView.prototype = Heritage.extend(AbstractTreeItem.prototype, {
    */
   _buildMarkerCells: function(doc, targetNode, arrowNode) {
     let marker = this.marker;
-    let style = this.root._blueprint[marker.name];
+    let blueprint = MarkerUtils.getBlueprintFor(marker);
     let startTime = this.root._interval.startTime;
     let endTime = this.root._interval.endTime;
 
-    let sidebarCell = this._buildMarkerSidebar(
-      doc, style, marker);
-
-    let timebarCell = this._buildMarkerTimebar(
-      doc, style, marker, startTime, endTime, arrowNode);
+    let sidebarCell = this._buildMarkerSidebar(doc, blueprint, marker);
+    let timebarCell = this._buildMarkerTimebar(doc, blueprint, marker, startTime, endTime, arrowNode);
 
     targetNode.appendChild(sidebarCell);
     targetNode.appendChild(timebarCell);
diff --git a/browser/devtools/performance/modules/widgets/markers-overview.js b/browser/devtools/performance/modules/widgets/markers-overview.js
index 3d75a5569640..53bfbf2ad1b2 100644
--- a/browser/devtools/performance/modules/widgets/markers-overview.js
+++ b/browser/devtools/performance/modules/widgets/markers-overview.js
@@ -21,6 +21,10 @@ loader.lazyRequireGetter(this, "L10N",
   "devtools/performance/global", true);
 loader.lazyRequireGetter(this, "TickUtils",
   "devtools/performance/waterfall-ticks", true);
+loader.lazyRequireGetter(this, "MarkerUtils",
+  "devtools/performance/marker-utils");
+loader.lazyRequireGetter(this, "TIMELINE_BLUEPRINT",
+  "devtools/performance/markers", true);
 
 const OVERVIEW_HEADER_HEIGHT = 14; // px
 const OVERVIEW_ROW_HEIGHT = 11; // px
@@ -28,14 +32,12 @@ const OVERVIEW_ROW_HEIGHT = 11; // px
 const OVERVIEW_SELECTION_LINE_COLOR = "#666";
 const OVERVIEW_CLIPHEAD_LINE_COLOR = "#555";
 
-const FIND_OPTIMAL_TICK_INTERVAL_MAX_ITERS = 100;
 const OVERVIEW_HEADER_TICKS_MULTIPLE = 100; // ms
 const OVERVIEW_HEADER_TICKS_SPACING_MIN = 75; // px
 const OVERVIEW_HEADER_TEXT_FONT_SIZE = 9; // px
 const OVERVIEW_HEADER_TEXT_FONT_FAMILY = "sans-serif";
 const OVERVIEW_HEADER_TEXT_PADDING_LEFT = 6; // px
 const OVERVIEW_HEADER_TEXT_PADDING_TOP = 1; // px
-const OVERVIEW_MARKERS_COLOR_STOPS = [0, 0.1, 0.75, 1];
 const OVERVIEW_MARKER_WIDTH_MIN = 4; // px
 const OVERVIEW_GROUP_VERTICAL_PADDING = 5; // px
 
@@ -44,13 +46,13 @@ const OVERVIEW_GROUP_VERTICAL_PADDING = 5; // px
  *
  * @param nsIDOMNode parent
  *        The parent node holding the overview.
- * @param Object blueprint
- *        List of names and colors defining markers.
+ * @param Array<String> filter
+ *        List of names of marker types that should not be shown.
  */
-function MarkersOverview(parent, blueprint, ...args) {
+function MarkersOverview(parent, filter=[], ...args) {
   AbstractCanvasGraph.apply(this, [parent, "markers-overview", ...args]);
   this.setTheme();
-  this.setBlueprint(blueprint);
+  this.setFilter(filter);
 }
 
 MarkersOverview.prototype = Heritage.extend(AbstractCanvasGraph.prototype, {
@@ -64,21 +66,36 @@ MarkersOverview.prototype = Heritage.extend(AbstractCanvasGraph.prototype, {
    * Compute the height of the overview.
    */
   get fixedHeight() {
-    return this.headerHeight + this.rowHeight * (this._lastGroup + 1);
+    return this.headerHeight + this.rowHeight * this._numberOfGroups;
   },
 
   /**
-   * List of names and colors used to paint this overview.
-   * @see TIMELINE_BLUEPRINT in timeline/widgets/global.js
+   * List of marker types that should not be shown in the graph.
    */
-  setBlueprint: function(blueprint) {
+  setFilter: function (filter) {
     this._paintBatches = new Map();
-    this._lastGroup = 0;
+    this._filter = filter;
+    this._groupMap = Object.create(null);
 
-    for (let type in blueprint) {
-      this._paintBatches.set(type, { style: blueprint[type], batch: [] });
-      this._lastGroup = Math.max(this._lastGroup, blueprint[type].group || 0);
+    let observedGroups = new Set();
+
+    for (let type in TIMELINE_BLUEPRINT) {
+      if (filter.indexOf(type) !== -1) {
+        continue;
+      }
+      this._paintBatches.set(type, { definition: TIMELINE_BLUEPRINT[type], batch: [] });
+      observedGroups.add(TIMELINE_BLUEPRINT[type].group);
     }
+
+    // Take our set of observed groups and order them and map
+    // the group numbers to fill in the holes via `_groupMap`.
+    // This normalizes our rows by removing rows that aren't used
+    // if filters are enabled.
+    let actualPosition = 0;
+    for (let groupNumber of Array.from(observedGroups).sort()) {
+      this._groupMap[groupNumber] = actualPosition++;
+    }
+    this._numberOfGroups = Object.keys(this._groupMap).length;
   },
 
   /**
@@ -103,17 +120,19 @@ MarkersOverview.prototype = Heritage.extend(AbstractCanvasGraph.prototype, {
 
     // Group markers into separate paint batches. This is necessary to
     // draw all markers sharing the same style at once.
-
     for (let marker of markers) {
-      let markerType = this._paintBatches.get(marker.name);
-      if (markerType) {
-        markerType.batch.push(marker);
+      // Again skip over markers that we're filtering -- we don't want them
+      // to be labeled as "Unknown"
+      if (!MarkerUtils.isMarkerValid(marker, this._filter)) {
+        continue;
       }
+
+      let markerType = this._paintBatches.get(marker.name) || this._paintBatches.get("UNKNOWN");
+      markerType.batch.push(marker);
     }
 
     // Calculate each row's height, and the time-based scaling.
 
-    let totalGroups = this._lastGroup + 1;
     let groupHeight = this.rowHeight * this._pixelRatio;
     let groupPadding = this.groupPadding * this._pixelRatio;
     let headerHeight = this.headerHeight * this._pixelRatio;
@@ -132,7 +151,7 @@ MarkersOverview.prototype = Heritage.extend(AbstractCanvasGraph.prototype, {
     ctx.fillStyle = this.alternatingBackgroundColor;
     ctx.beginPath();
 
-    for (let i = 0; i < totalGroups; i += 2) {
+    for (let i = 0; i < this._numberOfGroups; i += 2) {
       let top = headerHeight + i * groupHeight;
       ctx.rect(0, top, canvasWidth, groupHeight);
     }
@@ -172,11 +191,12 @@ MarkersOverview.prototype = Heritage.extend(AbstractCanvasGraph.prototype, {
 
     // Draw the timeline markers.
 
-    for (let [, { style, batch }] of this._paintBatches) {
-      let top = headerHeight + style.group * groupHeight + groupPadding / 2;
+    for (let [, { definition, batch }] of this._paintBatches) {
+      let group = this._groupMap[definition.group];
+      let top = headerHeight + group * groupHeight + groupPadding / 2;
       let height = groupHeight - groupPadding;
 
-      let color = getColor(style.colorName, this.theme);
+      let color = getColor(definition.colorName, this.theme);
       ctx.fillStyle = color;
       ctx.beginPath();
 
diff --git a/browser/devtools/performance/performance-controller.js b/browser/devtools/performance/performance-controller.js
index f43f9dfa78df..4fbc1e758007 100644
--- a/browser/devtools/performance/performance-controller.js
+++ b/browser/devtools/performance/performance-controller.js
@@ -398,16 +398,6 @@ let PerformanceController = {
     return null;
   },
 
-  /**
-   * Gets the current timeline blueprint without the hidden markers.
-   * @return object
-   */
-  getTimelineBlueprint: function() {
-    let blueprint = TIMELINE_BLUEPRINT;
-    let hiddenMarkers = this.getPref("hidden-markers");
-    return RecordingUtils.getFilteredBlueprint({ blueprint, hiddenMarkers });
-  },
-
   /**
    * Fired from RecordingsView, we listen on the PerformanceController so we can
    * set it here and re-emit on the controller, where all views can listen.
diff --git a/browser/devtools/performance/test/browser.ini b/browser/devtools/performance/test/browser.ini
index b296a57dd350..825586de938e 100644
--- a/browser/devtools/performance/test/browser.ini
+++ b/browser/devtools/performance/test/browser.ini
@@ -13,7 +13,6 @@ support-files =
 # that need to be moved over to performance tool
 
 [browser_aaa-run-first-leaktest.js]
-[browser_marker-utils.js]
 [browser_markers-cycle-collection.js]
 [browser_markers-gc.js]
 [browser_markers-parse-html.js]
@@ -137,7 +136,6 @@ support-files =
 [browser_profiler_tree-view-08.js]
 [browser_profiler_tree-view-09.js]
 [browser_profiler_tree-view-10.js]
-[browser_timeline-blueprint.js]
 [browser_timeline-filters.js]
 [browser_timeline-waterfall-background.js]
 [browser_timeline-waterfall-generic.js]
diff --git a/browser/devtools/performance/test/browser_marker-utils.js b/browser/devtools/performance/test/browser_marker-utils.js
deleted file mode 100644
index 86f7e5d89c05..000000000000
--- a/browser/devtools/performance/test/browser_marker-utils.js
+++ /dev/null
@@ -1,70 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-/**
- * Tests the marker utils methods.
- */
-
-function* spawnTest() {
-  let { TIMELINE_BLUEPRINT } = devtools.require("devtools/performance/markers");
-  let Utils = devtools.require("devtools/performance/marker-utils");
-
-  Services.prefs.setBoolPref(PLATFORM_DATA_PREF, false);
-
-  is(Utils.getMarkerLabel({ name: "DOMEvent" }), "DOM Event",
-    "getMarkerLabel() returns a simple label");
-  is(Utils.getMarkerLabel({ name: "Javascript", causeName: "setTimeout handler" }), "setTimeout",
-    "getMarkerLabel() returns a label defined via function");
-
-  ok(Utils.getMarkerFields({ name: "Paint" }).length === 0,
-    "getMarkerFields() returns an empty array when no fields defined");
-
-  let fields = Utils.getMarkerFields({ name: "ConsoleTime", causeName: "snowstorm" });
-  is(fields[0].label, "Timer Name:", "getMarkerFields() returns an array with proper label");
-  is(fields[0].value, "snowstorm", "getMarkerFields() returns an array with proper value");
-
-  fields = Utils.getMarkerFields({ name: "DOMEvent", type: "mouseclick" });
-  is(fields.length, 1, "getMarkerFields() ignores fields that are not found on marker");
-  is(fields[0].label, "Event Type:", "getMarkerFields() returns an array with proper label");
-  is(fields[0].value, "mouseclick", "getMarkerFields() returns an array with proper value");
-
-  fields = Utils.getMarkerFields({ name: "DOMEvent", eventPhase: Ci.nsIDOMEvent.AT_TARGET, type: "mouseclick" });
-  is(fields.length, 2, "getMarkerFields() returns multiple fields when using a fields function");
-  is(fields[0].label, "Event Type:", "getMarkerFields() correctly returns fields via function (1)");
-  is(fields[0].value, "mouseclick", "getMarkerFields() correctly returns fields via function (2)");
-  is(fields[1].label, "Phase:", "getMarkerFields() correctly returns fields via function (3)");
-  is(fields[1].value, "Target", "getMarkerFields() correctly returns fields via function (4)");
-
-  is(Utils.getMarkerFields({ name: "Javascript", causeName: "Some Platform Field" })[0].value, "(Gecko)",
-    "Correctly obfuscates JS markers when platform data is off.");
-  Services.prefs.setBoolPref(PLATFORM_DATA_PREF, true);
-  is(Utils.getMarkerFields({ name: "Javascript", causeName: "Some Platform Field" })[0].value, "Some Platform Field",
-    "Correctly deobfuscates JS markers when platform data is on.");
-
-  is(Utils.getMarkerClassName("Javascript"), "Function Call",
-    "getMarkerClassName() returns correct string when defined via function");
-  is(Utils.getMarkerClassName("GarbageCollection"), "GC Event",
-    "getMarkerClassName() returns correct string when defined via function");
-  is(Utils.getMarkerClassName("Reflow"), "Layout",
-    "getMarkerClassName() returns correct string when defined via string");
-
-  TIMELINE_BLUEPRINT["fakemarker"] = { group: 0 };
-  try {
-    Utils.getMarkerClassName("fakemarker");
-    ok(false, "getMarkerClassName() should throw when no label on blueprint.");
-  } catch (e) {
-    ok(true, "getMarkerClassName() should throw when no label on blueprint.");
-  }
-
-  TIMELINE_BLUEPRINT["fakemarker"] = { group: 0, label: () => void 0};
-  try {
-    Utils.getMarkerClassName("fakemarker");
-    ok(false, "getMarkerClassName() should throw when label function returnd undefined.");
-  } catch (e) {
-    ok(true, "getMarkerClassName() should throw when label function returnd undefined.");
-  }
-
-  delete TIMELINE_BLUEPRINT["fakemarker"];
-
-  finish();
-}
diff --git a/browser/devtools/performance/test/browser_timeline-blueprint.js b/browser/devtools/performance/test/browser_timeline-blueprint.js
deleted file mode 100644
index 5336e6bdd256..000000000000
--- a/browser/devtools/performance/test/browser_timeline-blueprint.js
+++ /dev/null
@@ -1,34 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-/**
- * Tests if the timeline blueprint has a correct structure.
- */
-
-function* spawnTest() {
-  let { TIMELINE_BLUEPRINT } = devtools.require("devtools/performance/markers");
-
-  ok(TIMELINE_BLUEPRINT,
-    "A timeline blueprint should be available.");
-
-  ok(Object.keys(TIMELINE_BLUEPRINT).length,
-    "The timeline blueprint has at least one entry.");
-
-  for (let [key, value] of Iterator(TIMELINE_BLUEPRINT)) {
-    if (key.startsWith("meta::")) {
-      ok(!("group" in value),
-        "No meta entry in the timeline blueprint can contain a `group` key.");
-      ok("colorName" in value,
-        "Each meta entry in the timeline blueprint contains a `colorName` key.");
-      ok("label" in value,
-        "Each meta entry in the timeline blueprint contains a `label` key.");
-    } else {
-      ok("group" in value,
-        "Each entry in the timeline blueprint contains a `group` key.");
-      ok("colorName" in value,
-        "Each entry in the timeline blueprint contains a `colorName` key.");
-      ok("label" in value,
-        "Each entry in the timeline blueprint contains a `label` key.");
-    }
-  }
-}
diff --git a/browser/devtools/performance/test/browser_timeline-filters.js b/browser/devtools/performance/test/browser_timeline-filters.js
index 7f61a968a408..e09efb164d02 100644
--- a/browser/devtools/performance/test/browser_timeline-filters.js
+++ b/browser/devtools/performance/test/browser_timeline-filters.js
@@ -5,6 +5,8 @@
  * Tests markers filtering mechanism.
  */
 
+const EPSILON = 0.00000001;
+
 function* spawnTest() {
   let { panel } = yield initPerformance(SIMPLE_URL);
   let { $, $$, EVENTS, PerformanceController, OverviewView, WaterfallView } = panel.panelWin;
@@ -24,20 +26,34 @@ function* spawnTest() {
 
   yield stopRecording(panel);
 
+  // Push some fake markers of a type we do not have a blueprint for
+  let markers = PerformanceController.getCurrentRecording().getMarkers();
+  let endTime = markers[markers.length - 1].end;
+  markers.push({ name: "CustomMarker", start: endTime + EPSILON, end: endTime + (EPSILON * 2) });
+  markers.push({ name: "CustomMarker", start: endTime + (EPSILON * 3), end: endTime + (EPSILON * 4) });
+
+  // Invalidate marker cache
+  WaterfallView._cache.delete(markers);
+
   // Select everything
-  OverviewView.setTimeInterval({ startTime: 0, endTime: Number.MAX_VALUE })
+  let waterfallRendered = WaterfallView.once(EVENTS.WATERFALL_RENDERED);
+  OverviewView.setTimeInterval({ startTime: 0, endTime: Number.MAX_VALUE });
 
   $("#filter-button").click();
   let menuItem1 = $("menuitem[marker-type=Styles]");
   let menuItem2 = $("menuitem[marker-type=Reflow]");
   let menuItem3 = $("menuitem[marker-type=Paint]");
+  let menuItem4 = $("menuitem[marker-type=UNKNOWN]");
 
   let overview = OverviewView.graphs.get("timeline");
   let originalHeight = overview.fixedHeight;
 
+  yield waterfallRendered;
+
   ok($(".waterfall-marker-bar[type=Styles]"), "Found at least one 'Styles' marker (1)");
   ok($(".waterfall-marker-bar[type=Reflow]"), "Found at least one 'Reflow' marker (1)");
   ok($(".waterfall-marker-bar[type=Paint]"), "Found at least one 'Paint' marker (1)");
+  ok($(".waterfall-marker-bar[type=CustomMarker]"), "Found at least one 'Unknown' marker (1)");
 
   let heightBefore = overview.fixedHeight;
   EventUtils.synthesizeMouseAtCenter(menuItem1, {type: "mouseup"}, panel.panelWin);
@@ -47,6 +63,7 @@ function* spawnTest() {
   ok(!$(".waterfall-marker-bar[type=Styles]"), "No 'Styles' marker (2)");
   ok($(".waterfall-marker-bar[type=Reflow]"), "Found at least one 'Reflow' marker (2)");
   ok($(".waterfall-marker-bar[type=Paint]"), "Found at least one 'Paint' marker (2)");
+  ok($(".waterfall-marker-bar[type=CustomMarker]"), "Found at least one 'Unknown' marker (2)");
 
   heightBefore = overview.fixedHeight;
   EventUtils.synthesizeMouseAtCenter(menuItem2, {type: "mouseup"}, panel.panelWin);
@@ -56,6 +73,7 @@ function* spawnTest() {
   ok(!$(".waterfall-marker-bar[type=Styles]"), "No 'Styles' marker (3)");
   ok(!$(".waterfall-marker-bar[type=Reflow]"), "No 'Reflow' marker (3)");
   ok($(".waterfall-marker-bar[type=Paint]"), "Found at least one 'Paint' marker (3)");
+  ok($(".waterfall-marker-bar[type=CustomMarker]"), "Found at least one 'Unknown' marker (3)");
 
   heightBefore = overview.fixedHeight;
   EventUtils.synthesizeMouseAtCenter(menuItem3, {type: "mouseup"}, panel.panelWin);
@@ -65,15 +83,25 @@ function* spawnTest() {
   ok(!$(".waterfall-marker-bar[type=Styles]"), "No 'Styles' marker (4)");
   ok(!$(".waterfall-marker-bar[type=Reflow]"), "No 'Reflow' marker (4)");
   ok(!$(".waterfall-marker-bar[type=Paint]"), "No 'Paint' marker (4)");
+  ok($(".waterfall-marker-bar[type=CustomMarker]"), "Found at least one 'Unknown' marker (4)");
+
+  EventUtils.synthesizeMouseAtCenter(menuItem4, {type: "mouseup"}, panel.panelWin);
+  yield waitForOverviewAndCommand(overview, menuItem4);
+
+  ok(!$(".waterfall-marker-bar[type=Styles]"), "No 'Styles' marker (5)");
+  ok(!$(".waterfall-marker-bar[type=Reflow]"), "No 'Reflow' marker (5)");
+  ok(!$(".waterfall-marker-bar[type=Paint]"), "No 'Paint' marker (5)");
+  ok(!$(".waterfall-marker-bar[type=CustomMarker]"), "No 'Unknown' marker (5)");
 
   for (let item of [menuItem1, menuItem2, menuItem3]) {
     EventUtils.synthesizeMouseAtCenter(item, {type: "mouseup"}, panel.panelWin);
     yield waitForOverviewAndCommand(overview, item);
   }
 
-  ok($(".waterfall-marker-bar[type=Styles]"), "Found at least one 'Styles' marker (5)");
-  ok($(".waterfall-marker-bar[type=Reflow]"), "Found at least one 'Reflow' marker (5)");
-  ok($(".waterfall-marker-bar[type=Paint]"), "Found at least one 'Paint' marker (5)");
+  ok($(".waterfall-marker-bar[type=Styles]"), "Found at least one 'Styles' marker (6)");
+  ok($(".waterfall-marker-bar[type=Reflow]"), "Found at least one 'Reflow' marker (6)");
+  ok($(".waterfall-marker-bar[type=Paint]"), "Found at least one 'Paint' marker (6)");
+  ok(!$(".waterfall-marker-bar[type=CustomMarker]"), "No 'Unknown' marker (6)");
 
   is(overview.fixedHeight, originalHeight, "Overview restored");
 
diff --git a/browser/devtools/performance/test/head.js b/browser/devtools/performance/test/head.js
index 9e39e58683e8..7f2eb057304c 100644
--- a/browser/devtools/performance/test/head.js
+++ b/browser/devtools/performance/test/head.js
@@ -61,6 +61,7 @@ let DEFAULT_PREFS = [
   "devtools.performance.profiler.buffer-size",
   "devtools.performance.profiler.sample-frequency-khz",
   "devtools.performance.ui.experimental",
+  "devtools.performance.timeline.hidden-markers",
 ].reduce((prefs, pref) => {
   prefs[pref] = Preferences.get(pref);
   return prefs;
diff --git a/browser/devtools/performance/test/unit/head.js b/browser/devtools/performance/test/unit/head.js
index de1ac9b2daad..14d39eef80cd 100644
--- a/browser/devtools/performance/test/unit/head.js
+++ b/browser/devtools/performance/test/unit/head.js
@@ -5,8 +5,11 @@
 const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
 
 let { devtools } = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
+let { Services } = Cu.import("resource://gre/modules/Services.jsm", {});
 const RecordingUtils = devtools.require("devtools/performance/recording-utils");
 
+const PLATFORM_DATA_PREF = "devtools.performance.ui.show-platform-data";
+
 /**
  * Get a path in a FrameNode call tree.
  */
diff --git a/browser/devtools/performance/test/unit/test_marker-blueprint.js b/browser/devtools/performance/test/unit/test_marker-blueprint.js
new file mode 100644
index 000000000000..bd93e3036de2
--- /dev/null
+++ b/browser/devtools/performance/test/unit/test_marker-blueprint.js
@@ -0,0 +1,29 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests if the timeline blueprint has a correct structure.
+ */
+
+function run_test() {
+  run_next_test();
+}
+
+add_task(function () {
+  let { TIMELINE_BLUEPRINT } = devtools.require("devtools/performance/markers");
+
+  ok(TIMELINE_BLUEPRINT,
+    "A timeline blueprint should be available.");
+
+  ok(Object.keys(TIMELINE_BLUEPRINT).length,
+    "The timeline blueprint has at least one entry.");
+
+  for (let [key, value] of Iterator(TIMELINE_BLUEPRINT)) {
+    ok("group" in value,
+      "Each entry in the timeline blueprint contains a `group` key.");
+    ok("colorName" in value,
+      "Each entry in the timeline blueprint contains a `colorName` key.");
+    ok("label" in value,
+      "Each entry in the timeline blueprint contains a `label` key.");
+  }
+});
diff --git a/browser/devtools/performance/test/unit/test_marker-utils.js b/browser/devtools/performance/test/unit/test_marker-utils.js
new file mode 100644
index 000000000000..f9e3d1efbc33
--- /dev/null
+++ b/browser/devtools/performance/test/unit/test_marker-utils.js
@@ -0,0 +1,88 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Tests the marker utils methods.
+ */
+
+function run_test() {
+  run_next_test();
+}
+
+add_task(function () {
+  let { TIMELINE_BLUEPRINT } = devtools.require("devtools/performance/markers");
+  let Utils = devtools.require("devtools/performance/marker-utils");
+
+  Services.prefs.setBoolPref(PLATFORM_DATA_PREF, false);
+
+  equal(Utils.getMarkerLabel({ name: "DOMEvent" }), "DOM Event",
+    "getMarkerLabel() returns a simple label");
+  equal(Utils.getMarkerLabel({ name: "Javascript", causeName: "setTimeout handler" }), "setTimeout",
+    "getMarkerLabel() returns a label defined via function");
+
+  ok(Utils.getMarkerFields({ name: "Paint" }).length === 0,
+    "getMarkerFields() returns an empty array when no fields defined");
+
+  let fields = Utils.getMarkerFields({ name: "ConsoleTime", causeName: "snowstorm" });
+  equal(fields[0].label, "Timer Name:", "getMarkerFields() returns an array with proper label");
+  equal(fields[0].value, "snowstorm", "getMarkerFields() returns an array with proper value");
+
+  fields = Utils.getMarkerFields({ name: "DOMEvent", type: "mouseclick" });
+  equal(fields.length, 1, "getMarkerFields() ignores fields that are not found on marker");
+  equal(fields[0].label, "Event Type:", "getMarkerFields() returns an array with proper label");
+  equal(fields[0].value, "mouseclick", "getMarkerFields() returns an array with proper value");
+
+  fields = Utils.getMarkerFields({ name: "DOMEvent", eventPhase: Ci.nsIDOMEvent.AT_TARGET, type: "mouseclick" });
+  equal(fields.length, 2, "getMarkerFields() returns multiple fields when using a fields function");
+  equal(fields[0].label, "Event Type:", "getMarkerFields() correctly returns fields via function (1)");
+  equal(fields[0].value, "mouseclick", "getMarkerFields() correctly returns fields via function (2)");
+  equal(fields[1].label, "Phase:", "getMarkerFields() correctly returns fields via function (3)");
+  equal(fields[1].value, "Target", "getMarkerFields() correctly returns fields via function (4)");
+
+  equal(Utils.getMarkerFields({ name: "Javascript", causeName: "Some Platform Field" })[0].value, "(Gecko)",
+    "Correctly obfuscates JS markers when platform data is off.");
+  Services.prefs.setBoolPref(PLATFORM_DATA_PREF, true);
+  equal(Utils.getMarkerFields({ name: "Javascript", causeName: "Some Platform Field" })[0].value, "Some Platform Field",
+    "Correctly deobfuscates JS markers when platform data is on.");
+
+  equal(Utils.getMarkerClassName("Javascript"), "Function Call",
+    "getMarkerClassName() returns correct string when defined via function");
+  equal(Utils.getMarkerClassName("GarbageCollection"), "GC Event",
+    "getMarkerClassName() returns correct string when defined via function");
+  equal(Utils.getMarkerClassName("Reflow"), "Layout",
+    "getMarkerClassName() returns correct string when defined via string");
+
+  TIMELINE_BLUEPRINT["fakemarker"] = { group: 0 };
+  try {
+    Utils.getMarkerClassName("fakemarker");
+    ok(false, "getMarkerClassName() should throw when no label on blueprint.");
+  } catch (e) {
+    ok(true, "getMarkerClassName() should throw when no label on blueprint.");
+  }
+
+  TIMELINE_BLUEPRINT["fakemarker"] = { group: 0, label: () => void 0};
+  try {
+    Utils.getMarkerClassName("fakemarker");
+    ok(false, "getMarkerClassName() should throw when label function returnd undefined.");
+  } catch (e) {
+    ok(true, "getMarkerClassName() should throw when label function returnd undefined.");
+  }
+
+  delete TIMELINE_BLUEPRINT["fakemarker"];
+
+  let customBlueprint = {
+    UNKNOWN: {
+      group: 1,
+      label: "MyDefault"
+    },
+    custom: {
+      group: 0,
+      label: "MyCustom"
+    }
+  };
+
+  equal(Utils.getBlueprintFor({ name: "Reflow" }).label, "Layout",
+    "Utils.getBlueprintFor() should return marker def for passed in marker.");
+  equal(Utils.getBlueprintFor({ name: "Not sure!" }).label(), "Unknown",
+    "Utils.getBlueprintFor() should return a default marker def if the marker is undefined.");
+});
diff --git a/browser/devtools/performance/test/unit/xpcshell.ini b/browser/devtools/performance/test/unit/xpcshell.ini
index b84740d0f699..acefb997ea97 100644
--- a/browser/devtools/performance/test/unit/xpcshell.ini
+++ b/browser/devtools/performance/test/unit/xpcshell.ini
@@ -5,9 +5,11 @@ tail =
 firefox-appdir = browser
 skip-if = toolkit == 'android' || toolkit == 'gonk'
 
-[test_profiler-categories.js]
 [test_frame-utils-01.js]
 [test_frame-utils-02.js]
+[test_marker-blueprint.js]
+[test_marker-utils.js]
+[test_profiler-categories.js]
 [test_tree-model-01.js]
 [test_tree-model-02.js]
 [test_tree-model-03.js]
diff --git a/browser/devtools/performance/views/details-waterfall.js b/browser/devtools/performance/views/details-waterfall.js
index eb26fc4affca..0896b7b111d4 100644
--- a/browser/devtools/performance/views/details-waterfall.js
+++ b/browser/devtools/performance/views/details-waterfall.js
@@ -32,6 +32,7 @@ let WaterfallView = Heritage.extend(DetailsSubview, {
     this._onMarkerSelected = this._onMarkerSelected.bind(this);
     this._onResize = this._onResize.bind(this);
     this._onViewSource = this._onViewSource.bind(this);
+    this._hiddenMarkers = PerformanceController.getPref("hidden-markers");
 
     this.headerContainer = $("#waterfall-header");
     this.breakdownContainer = $("#waterfall-breakdown");
@@ -111,8 +112,7 @@ let WaterfallView = Heritage.extend(DetailsSubview, {
    * Called whenever an observed pref is changed.
    */
   _onObservedPrefChange: function(_, prefName) {
-    let blueprint = PerformanceController.getTimelineBlueprint();
-    this._markersRoot.blueprint = blueprint;
+    this._hiddenMarkers = PerformanceController.getPref("hidden-markers");
   },
 
   /**
@@ -136,7 +136,7 @@ let WaterfallView = Heritage.extend(DetailsSubview, {
 
     WaterfallUtils.collapseMarkersIntoNode({
       markerNode: rootMarkerNode,
-      markersList: markers
+      markersList: markers,
     });
 
     this._cache.set(markers, rootMarkerNode);
@@ -160,8 +160,7 @@ let WaterfallView = Heritage.extend(DetailsSubview, {
     this._markersRoot = root;
     this._waterfallHeader = header;
 
-    let blueprint = PerformanceController.getTimelineBlueprint();
-    root.blueprint = blueprint;
+    root.filter = this._hiddenMarkers;
     root.interval = interval;
     root.on("selected", this._onMarkerSelected);
     root.on("unselected", this._onMarkerSelected);
diff --git a/browser/devtools/performance/views/overview.js b/browser/devtools/performance/views/overview.js
index 1f05eaf9b487..5f017f7e008c 100644
--- a/browser/devtools/performance/views/overview.js
+++ b/browser/devtools/performance/views/overview.js
@@ -42,7 +42,7 @@ let OverviewView = {
   initialize: function () {
     this.graphs = new GraphsController({
       root: $("#overview-pane"),
-      getBlueprint: () => PerformanceController.getTimelineBlueprint(),
+      getFilter: () => PerformanceController.getPref("hidden-markers"),
       getTheme: () => PerformanceController.getTheme(),
     });
 
@@ -331,8 +331,8 @@ let OverviewView = {
       case "hidden-markers": {
         let graph;
         if (graph = yield this.graphs.isAvailable("timeline")) {
-          let blueprint = PerformanceController.getTimelineBlueprint();
-          graph.setBlueprint(blueprint);
+          let filter = PerformanceController.getPref("hidden-markers");
+          graph.setFilter(filter);
           graph.refresh({ force: true });
         }
         break;
diff --git a/browser/locales/en-US/chrome/browser/devtools/timeline.properties b/browser/locales/en-US/chrome/browser/devtools/timeline.properties
index 77b745b39c15..774be3add109 100644
--- a/browser/locales/en-US/chrome/browser/devtools/timeline.properties
+++ b/browser/locales/en-US/chrome/browser/devtools/timeline.properties
@@ -46,6 +46,7 @@ timeline.label.domevent=DOM Event
 timeline.label.consoleTime=Console
 timeline.label.garbageCollection=GC Event
 timeline.label.timestamp=Timestamp
+timeline.label.unknown=Unknown
 
 # LOCALIZATION NOTE (graphs.memory):
 # This string is displayed in the memory graph of the Performance tool,