--- a/toolkit/content/aboutTelemetry.js
+++ b/toolkit/content/aboutTelemetry.js
@@ -1122,19 +1122,27 @@ var CapturedStacks = {
                   capturedStacks.stacks.length > 0;
     setHasData("captured-stacks-section", hasData);
     if (!hasData) {
       return;
     }
 
     let stacks = capturedStacks.stacks;
     let memoryMap = capturedStacks.memoryMap;
+    let captures = capturedStacks.captures;
 
-    StackRenderer.renderStacks("captured-stacks", stacks, memoryMap, () => {});
+    StackRenderer.renderStacks("captured-stacks", stacks, memoryMap,
+                              (index) => this.renderCaptureHeader(index, captures));
   },
+
+  renderCaptureHeader: function CaptureStacks_renderCaptureHeader(index, captures) {
+    let key = captures[index][0];
+    let cardinality = captures[index][2];
+    StackRenderer.renderHeader("captured-stacks", [key, cardinality]);
+  }
 };
 
 var ThreadHangStats = {
 
   /**
    * Renders raw thread hang stats data
    */
   render(aPayload) {
@@ -1830,30 +1838,28 @@ function setupListeners() {
 
   document.getElementById("captured-stacks-fetch-symbols").addEventListener("click",
     function() {
       if (!gPingData) {
         return;
       }
       let capturedStacks = gPingData.payload.processes.parent.capturedStacks;
       let req = new SymbolicationRequest("captured-stacks",
-                                         CapturedStacks.render,
+                                         CapturedStacks.renderCaptureHeader,
                                          capturedStacks.memoryMap,
                                          capturedStacks.stacks,
-                                         null);
+                                         capturedStacks.captures);
       req.fetchSymbols();
   });
 
   document.getElementById("captured-stacks-hide-symbols").addEventListener("click",
     function() {
-      if (!gPingData) {
-        return;
+      if (gPingData) {
+        CapturedStacks.render(gPingData.payload);
       }
-
-      CapturedStacks.render(gPingData);
   });
 
   document.getElementById("late-writes-fetch-symbols").addEventListener("click",
     function() {
       if (!gPingData) {
         return;
       }
 

--- a/toolkit/locales/en-US/chrome/global/aboutTelemetry.dtd
+++ b/toolkit/locales/en-US/chrome/global/aboutTelemetry.dtd
@@ -152,21 +152,21 @@ Ping
   (No data collected)
 ">
 
 <!ENTITY aboutTelemetry.fullSqlWarning "
   NOTE: Slow SQL debugging is enabled. Full SQL strings may be displayed below but they will not be submitted to Telemetry.
 ">
 
 <!ENTITY aboutTelemetry.fetchSymbols "
-  Fetch function names for hang stacks
+  Fetch function names for stacks
 ">
 
 <!ENTITY aboutTelemetry.hideSymbols "
-  Show raw data from hangs
+  Show raw stack data
 ">
 
 <!ENTITY aboutTelemetry.filterText "
   Filter (strings or /regexp/)
 ">
 
 <!ENTITY aboutTelemetry.payloadChoiceHeader "
   Payload

--- a/toolkit/locales/en-US/chrome/global/aboutTelemetry.properties
+++ b/toolkit/locales/en-US/chrome/global/aboutTelemetry.properties
@@ -40,16 +40,21 @@ slowSqlAverage = Avg. Time (ms)
 slowSqlStatement = Statement
 
 # Note to translators:
 # - The %1$S will be replaced with the number of the hang
 # - The %2$S will be replaced with the duration of the hang
 chrome-hangs-title = Hang Report #%1$S (%2$S seconds)
 
 # Note to translators:
+# - The %1$S will be replaced with the string key for this stack.
+# - The %2$S will be replaced with the number of times this stack was captured.
+captured-stacks-title = %1$S (capture count: %2$S)
+
+# Note to translators:
 # - The %1$S will be replaced with the number of the late write
 late-writes-title = Late Write #%1$S
 
 stackTitle = Stack:
 
 memoryMapTitle = Memory map:
 
 errorFetchingSymbols = An error occurred while fetching symbols. Check that you are connected to the Internet and try again.