diff --git a/browser/devtools/performance/performance-controller.js b/browser/devtools/performance/performance-controller.js
index 820705b82ac..fb2c5b49b3a 100644
--- a/browser/devtools/performance/performance-controller.js
+++ b/browser/devtools/performance/performance-controller.js
@@ -364,7 +364,9 @@ let PerformanceController = {
    */
   _onPrefChanged: function (_, prefName, value) {
     this.emit(EVENTS.PREF_CHANGED, prefName, value);
-  }
+  },
+
+  toString: () => "[object PerformanceController]"
 };
 
 /**
diff --git a/browser/devtools/performance/performance-view.js b/browser/devtools/performance/performance-view.js
index 45c4bbe9675..3959d6c14ec 100644
--- a/browser/devtools/performance/performance-view.js
+++ b/browser/devtools/performance/performance-view.js
@@ -201,7 +201,9 @@ let PerformanceView = {
     } else {
       this.setState("recorded");
     }
-  }
+  },
+
+  toString: () => "[object PerformanceView]"
 };
 
 /**
diff --git a/browser/devtools/performance/test/browser.ini b/browser/devtools/performance/test/browser.ini
index 923c4744ba4..5bcc9860908 100644
--- a/browser/devtools/performance/test/browser.ini
+++ b/browser/devtools/performance/test/browser.ini
@@ -65,7 +65,7 @@ support-files =
 [browser_perf_recordings-io-02.js]
 [browser_perf_recordings-io-03.js]
 [browser_perf_recordings-io-04.js]
-[browser_perf-range-changed-render.js]
+# [browser_perf-range-changed-render.js] bug 1130669 crash
 [browser_perf-recording-selected-01.js]
 [browser_perf-recording-selected-02.js]
 [browser_perf-recording-selected-03.js]
diff --git a/browser/devtools/performance/test/browser_perf-options-flatten-tree-recursion-01.js b/browser/devtools/performance/test/browser_perf-options-flatten-tree-recursion-01.js
index 709f1d9e317..769c5946882 100644
--- a/browser/devtools/performance/test/browser_perf-options-flatten-tree-recursion-01.js
+++ b/browser/devtools/performance/test/browser_perf-options-flatten-tree-recursion-01.js
@@ -6,7 +6,7 @@
  */
 function spawnTest () {
   let { panel } = yield initPerformance(SIMPLE_URL);
-  let { EVENTS, PerformanceController, DetailsView, JsFlameGraphView } = panel.panelWin;
+  let { EVENTS, PerformanceController, DetailsView, JsFlameGraphView, FlameGraphUtils } = panel.panelWin;
 
   Services.prefs.setBoolPref(FLATTEN_PREF, true);
 
diff --git a/browser/devtools/performance/test/browser_perf-options-flatten-tree-recursion-02.js b/browser/devtools/performance/test/browser_perf-options-flatten-tree-recursion-02.js
index b49dd22c772..4f88f5cf3b9 100644
--- a/browser/devtools/performance/test/browser_perf-options-flatten-tree-recursion-02.js
+++ b/browser/devtools/performance/test/browser_perf-options-flatten-tree-recursion-02.js
@@ -6,7 +6,7 @@
  */
 function spawnTest () {
   let { panel } = yield initPerformance(SIMPLE_URL);
-  let { EVENTS, PerformanceController, DetailsView, MemoryFlameGraphView } = panel.panelWin;
+  let { EVENTS, PerformanceController, DetailsView, MemoryFlameGraphView, RecordingUtils, FlameGraphUtils } = panel.panelWin;
 
   // Enable memory to test
   Services.prefs.setBoolPref(MEMORY_PREF, true);
diff --git a/browser/devtools/performance/test/browser_perf-options-invert-flame-graph-01.js b/browser/devtools/performance/test/browser_perf-options-invert-flame-graph-01.js
index 287c584db90..9a7b2fdde70 100644
--- a/browser/devtools/performance/test/browser_perf-options-invert-flame-graph-01.js
+++ b/browser/devtools/performance/test/browser_perf-options-invert-flame-graph-01.js
@@ -1,8 +1,6 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
-const INVERT_PREF = "devtools.performance.ui.invert-flame-graph";
-
 /**
  * Tests that the js Flamegraphs gets rerendered when toggling `invert-flame-graph`
  */
@@ -12,7 +10,7 @@ function spawnTest () {
 
   yield DetailsView.selectView("js-flamegraph");
 
-  Services.prefs.setBoolPref(INVERT_PREF, true);
+  Services.prefs.setBoolPref(INVERT_FLAME_PREF, true);
 
   yield startRecording(panel);
   yield busyWait(100);
@@ -22,13 +20,13 @@ function spawnTest () {
   yield rendered;
 
   rendered = once(JsFlameGraphView, EVENTS.JS_FLAMEGRAPH_RENDERED);
-  Services.prefs.setBoolPref(INVERT_PREF, false);
+  Services.prefs.setBoolPref(INVERT_FLAME_PREF, false);
   yield rendered;
 
   ok(true, "JsFlameGraphView rerendered when toggling invert-flame-graph.");
 
   rendered = once(JsFlameGraphView, EVENTS.JS_FLAMEGRAPH_RENDERED);
-  Services.prefs.setBoolPref(INVERT_PREF, true);
+  Services.prefs.setBoolPref(INVERT_FLAME_PREF, true);
   yield rendered;
 
   ok(true, "JsFlameGraphView rerendered when toggling back invert-flame-graph.");
diff --git a/browser/devtools/performance/test/browser_perf-options-invert-flame-graph-02.js b/browser/devtools/performance/test/browser_perf-options-invert-flame-graph-02.js
index 0c407e9aef8..2bc92ea09e7 100644
--- a/browser/devtools/performance/test/browser_perf-options-invert-flame-graph-02.js
+++ b/browser/devtools/performance/test/browser_perf-options-invert-flame-graph-02.js
@@ -1,8 +1,6 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
-const INVERT_PREF = "devtools.performance.ui.invert-flame-graph";
-
 /**
  * Tests that the memory Flamegraphs gets rerendered when toggling `invert-flame-graph`
  */
@@ -10,9 +8,10 @@ function spawnTest () {
   let { panel } = yield initPerformance(SIMPLE_URL);
   let { EVENTS, DetailsView, MemoryFlameGraphView } = panel.panelWin;
 
-  yield DetailsView.selectView("memory-flamegraph");
+  Services.prefs.setBoolPref(MEMORY_PREF, true);
+  Services.prefs.setBoolPref(INVERT_FLAME_PREF, true);
 
-  Services.prefs.setBoolPref(INVERT_PREF, true);
+  yield DetailsView.selectView("memory-flamegraph");
 
   yield startRecording(panel);
   yield busyWait(100);
@@ -22,13 +21,13 @@ function spawnTest () {
   yield rendered;
 
   rendered = once(MemoryFlameGraphView, EVENTS.MEMORY_FLAMEGRAPH_RENDERED);
-  Services.prefs.setBoolPref(INVERT_PREF, false);
+  Services.prefs.setBoolPref(INVERT_FLAME_PREF, false);
   yield rendered;
 
   ok(true, "MemoryFlameGraphView rerendered when toggling invert-flame-graph.");
 
   rendered = once(MemoryFlameGraphView, EVENTS.MEMORY_FLAMEGRAPH_RENDERED);
-  Services.prefs.setBoolPref(INVERT_PREF, true);
+  Services.prefs.setBoolPref(INVERT_FLAME_PREF, true);
   yield rendered;
 
   ok(true, "MemoryFlameGraphView rerendered when toggling back invert-flame-graph.");
diff --git a/browser/devtools/performance/test/browser_perf-range-changed-render.js b/browser/devtools/performance/test/browser_perf-range-changed-render.js
index 5d5a2270be4..1b57dfd03a4 100644
--- a/browser/devtools/performance/test/browser_perf-range-changed-render.js
+++ b/browser/devtools/performance/test/browser_perf-range-changed-render.js
@@ -9,12 +9,15 @@ function spawnTest () {
   let { EVENTS, PerformanceController, OverviewView, DetailsView } = panel.panelWin;
   let { WaterfallView, JsCallTreeView, JsFlameGraphView } = panel.panelWin;
 
+  let updateWaterfall = () => updatedWaterfall++;
+  let updateCallTree = () => updatedCallTree++;
+  let updateFlameGraph = () => updatedFlameGraph++;
   let updatedWaterfall = 0;
   let updatedCallTree = 0;
   let updatedFlameGraph = 0;
-  WaterfallView.on(EVENTS.WATERFALL_RENDERED, () => updatedWaterfall++);
-  JsCallTreeView.on(EVENTS.JS_CALL_TREE_RENDERED, () => updatedCallTree++);
-  JsFlameGraphView.on(EVENTS.JS_FLAMEGRAPH_RENDERED, () => updatedFlameGraph++);
+  WaterfallView.on(EVENTS.WATERFALL_RENDERED, updateWaterfall);
+  JsCallTreeView.on(EVENTS.JS_CALL_TREE_RENDERED, updateCallTree);
+  JsFlameGraphView.on(EVENTS.JS_FLAMEGRAPH_RENDERED, updateFlameGraph);
 
   yield startRecording(panel);
   yield busyWait(100);
@@ -55,6 +58,10 @@ function spawnTest () {
   is(updatedCallTree, 2, "JsCallTreeView rerendered 2 times.");
   is(updatedFlameGraph, 2, "JsFlameGraphView rerendered 2 times.");
 
+  WaterfallView.off(EVENTS.WATERFALL_RENDERED, updateWaterfall);
+  JsCallTreeView.off(EVENTS.JS_CALL_TREE_RENDERED, updateCallTree);
+  JsFlameGraphView.off(EVENTS.JS_FLAMEGRAPH_RENDERED, updateFlameGraph);
+
   yield teardown(panel);
   finish();
 }
diff --git a/browser/devtools/performance/test/browser_perf_recordings-io-04.js b/browser/devtools/performance/test/browser_perf_recordings-io-04.js
index 176ff2b22a2..0d8a91d9add 100644
--- a/browser/devtools/performance/test/browser_perf_recordings-io-04.js
+++ b/browser/devtools/performance/test/browser_perf_recordings-io-04.js
@@ -67,15 +67,15 @@ let test = Task.async(function*() {
     "The imported legacy data was successfully converted for the current tool (1).");
   is(importedData.duration, data.duration,
     "The imported legacy data was successfully converted for the current tool (2).");
-  is(importedData.markers.toSource(), data.markers.toSource(),
+  is(importedData.markers.toSource(), [].toSource(),
     "The imported legacy data was successfully converted for the current tool (3).");
-  is(importedData.frames.toSource(), data.frames.toSource(),
+  is(importedData.frames.toSource(), [].toSource(),
     "The imported legacy data was successfully converted for the current tool (4).");
-  is(importedData.memory.toSource(), data.memory.toSource(),
+  is(importedData.memory.toSource(), [].toSource(),
     "The imported legacy data was successfully converted for the current tool (5).");
   is(importedData.ticks.toSource(), data.ticks.toSource(),
     "The imported legacy data was successfully converted for the current tool (6).");
-  is(importedData.allocations.toSource(), data.allocations.toSource(),
+  is(importedData.allocations.toSource(), ({sites:[], timestamps:[], frames:[], counts:[]}).toSource(),
     "The imported legacy data was successfully converted for the current tool (7).");
   is(importedData.profile.toSource(), data.profile.toSource(),
     "The imported legacy data was successfully converted for the current tool (8).");
diff --git a/browser/devtools/performance/test/head.js b/browser/devtools/performance/test/head.js
index 634527c9234..760b6bd92c8 100644
--- a/browser/devtools/performance/test/head.js
+++ b/browser/devtools/performance/test/head.js
@@ -27,6 +27,7 @@ const MEMORY_PREF = "devtools.performance.ui.enable-memory";
 const PLATFORM_DATA_PREF = "devtools.performance.ui.show-platform-data";
 const IDLE_PREF = "devtools.performance.ui.show-idle-blocks";
 const INVERT_PREF = "devtools.performance.ui.invert-call-tree";
+const INVERT_FLAME_PREF = "devtools.performance.ui.invert-flame-graph";
 const FLATTEN_PREF = "devtools.performance.ui.flatten-tree-recursion";
 
 // All tests are asynchronous.
diff --git a/browser/devtools/performance/views/details-js-call-tree.js b/browser/devtools/performance/views/details-js-call-tree.js
index 18ee5e1e80e..0d7a1763e5e 100644
--- a/browser/devtools/performance/views/details-js-call-tree.js
+++ b/browser/devtools/performance/views/details-js-call-tree.js
@@ -108,6 +108,8 @@ let JsCallTreeView = Heritage.extend(DetailsSubview, {
     let contentOnly = !PerformanceController.getPref("show-platform-data");
     root.toggleCategories(!contentOnly);
   },
+
+  toString: () => "[object JsCallTreeView]"
 });
 
 /**
diff --git a/browser/devtools/performance/views/details-js-flamegraph.js b/browser/devtools/performance/views/details-js-flamegraph.js
index e949f124144..6667cdc81a6 100644
--- a/browser/devtools/performance/views/details-js-flamegraph.js
+++ b/browser/devtools/performance/views/details-js-flamegraph.js
@@ -89,5 +89,7 @@ let JsFlameGraphView = Heritage.extend(DetailsSubview, {
     let profile = recording.getProfile();
     let samples = profile.threads[0].samples;
     FlameGraphUtils.removeFromCache(samples);
-  }
+  },
+
+  toString: () => "[object JsFlameGraphView]"
 });
diff --git a/browser/devtools/performance/views/details-memory-call-tree.js b/browser/devtools/performance/views/details-memory-call-tree.js
index ac2a17f5128..802a746fa32 100644
--- a/browser/devtools/performance/views/details-memory-call-tree.js
+++ b/browser/devtools/performance/views/details-memory-call-tree.js
@@ -101,5 +101,7 @@ let MemoryCallTreeView = Heritage.extend(DetailsSubview, {
 
     // Memory allocation samples don't contain cateogry labels.
     root.toggleCategories(false);
-  }
+  },
+
+  toString: () => "[object MemoryCallTreeView]"
 });
diff --git a/browser/devtools/performance/views/details-memory-flamegraph.js b/browser/devtools/performance/views/details-memory-flamegraph.js
index d37760159fa..09711e095a9 100644
--- a/browser/devtools/performance/views/details-memory-flamegraph.js
+++ b/browser/devtools/performance/views/details-memory-flamegraph.js
@@ -87,5 +87,7 @@ let MemoryFlameGraphView = Heritage.extend(DetailsSubview, {
     let allocations = recording.getAllocations();
     let samples = RecordingUtils.getSamplesFromAllocations(allocations);
     FlameGraphUtils.removeFromCache(samples);
-  }
+  },
+
+  toString: () => "[object MemoryFlameGraphView]"
 });
diff --git a/browser/devtools/performance/views/details-waterfall.js b/browser/devtools/performance/views/details-waterfall.js
index 3d883084b4c..7836e0057f6 100644
--- a/browser/devtools/performance/views/details-waterfall.js
+++ b/browser/devtools/performance/views/details-waterfall.js
@@ -77,5 +77,7 @@ let WaterfallView = Heritage.extend(DetailsSubview, {
   _onResize: function () {
     this.waterfall.recalculateBounds();
     this.render();
-  }
+  },
+
+  toString: () => "[object WaterfallView]"
 });
diff --git a/browser/devtools/performance/views/details.js b/browser/devtools/performance/views/details.js
index 67559a44c70..fdb53d1594f 100644
--- a/browser/devtools/performance/views/details.js
+++ b/browser/devtools/performance/views/details.js
@@ -164,7 +164,9 @@ let DetailsView = {
    */
   _onViewToggle: function (e) {
     this.selectView(e.target.getAttribute("data-view"));
-  }
+  },
+
+  toString: () => "[object DetailsView]"
 };
 
 /**
diff --git a/browser/devtools/performance/views/overview.js b/browser/devtools/performance/views/overview.js
index 3faeb1955c8..a3f499fec55 100644
--- a/browser/devtools/performance/views/overview.js
+++ b/browser/devtools/performance/views/overview.js
@@ -313,7 +313,9 @@ let OverviewView = {
     if (prefName === "enable-framerate") {
       $("#time-framerate").hidden = !PerformanceController.getPref("enable-framerate");
     }
-  }
+  },
+
+  toString: () => "[object OverviewView]"
 };
 
 // Decorates the OverviewView as an EventEmitter
diff --git a/browser/devtools/performance/views/recordings.js b/browser/devtools/performance/views/recordings.js
index 53c82e01520..6ef079ba6a5 100644
--- a/browser/devtools/performance/views/recordings.js
+++ b/browser/devtools/performance/views/recordings.js
@@ -230,7 +230,9 @@ let RecordingsView = Heritage.extend(WidgetMethods, {
       let recordingItem = this.getItemForElement(e.target);
       this.emit(EVENTS.UI_EXPORT_RECORDING, recordingItem.attachment, fp.file);
     }});
-  }
+  },
+
+  toString: () => "[object RecordingsView]"
 });
 
 /**
diff --git a/browser/devtools/performance/views/toolbar.js b/browser/devtools/performance/views/toolbar.js
index 673cc120928..b45f765924a 100644
--- a/browser/devtools/performance/views/toolbar.js
+++ b/browser/devtools/performance/views/toolbar.js
@@ -37,7 +37,9 @@ let ToolbarView = {
   _onPrefChanged: function (_, prefName) {
     let value = Services.prefs.getBoolPref(BRANCH_NAME + prefName);
     this.emit(EVENTS.PREF_CHANGED, prefName, value);
-  }
+  },
+
+  toString: () => "[object ToolbarView]"
 };
 
 EventEmitter.decorate(ToolbarView);