diff --git a/toolkit/content/aboutSupport.js b/toolkit/content/aboutSupport.js
index f9a0abcb0e..fccb99e810 100644
--- a/toolkit/content/aboutSupport.js
+++ b/toolkit/content/aboutSupport.js
@@ -39,6 +39,10 @@ var snapshotFormatters = {
     $("application-box").textContent = data.name;
     $("useragent-box").textContent = data.userAgent;
     $("os-box").textContent = data.osVersion;
+    let cpucaps = navigator.cpuHasSSE2?"SSE2 ":"";
+    cpucaps    += navigator.cpuHasAVX?"AVX ":"";
+    cpucaps    += navigator.cpuHasAVX2?"AVX2 ":"";
+    $("cpucap-box").textContent = cpucaps;
     $("binary-box").textContent = Services.dirsvc.get("XREExeF", Ci.nsIFile).path;
     $("supportLink").href = data.supportURL;
     let version = Services.appinfo.version;
diff --git a/toolkit/content/aboutSupport.xhtml b/toolkit/content/aboutSupport.xhtml
index 8afee18676..b9d61e2982 100644
--- a/toolkit/content/aboutSupport.xhtml
+++ b/toolkit/content/aboutSupport.xhtml
@@ -142,6 +142,15 @@
             </td>
           </tr>
 
+          <tr>
+            <th class="column">
+              &aboutSupport.appBasicsCPUCaps;
+            </th>
+
+            <td id="cpucap-box">
+            </td>
+          </tr>
+
           <tr class="no-copy">
             <th class="column">
               &aboutSupport.appBasicsBinary;
diff --git a/toolkit/locales/en-US/chrome/global/aboutSupport.dtd b/toolkit/locales/en-US/chrome/global/aboutSupport.dtd
index f827268b43..96d9deef0d 100644
--- a/toolkit/locales/en-US/chrome/global/aboutSupport.dtd
+++ b/toolkit/locales/en-US/chrome/global/aboutSupport.dtd
@@ -47,6 +47,7 @@ Windows/Mac use the term "Folder" instead of "Directory" -->
 <!ENTITY aboutSupport.appBasicsBuildConfig "Build Configuration">
 <!ENTITY aboutSupport.appBasicsUserAgent "User Agent">
 <!ENTITY aboutSupport.appBasicsOS "OS">
+<!ENTITY aboutSupport.appBasicsCPUCaps "CPU Capabilities">
 <!ENTITY aboutSupport.appBasicsMemoryUse "Memory Use">
 <!ENTITY aboutSupport.appBasicsPerformance "Performance">