diff --git a/toolkit/content/aboutSupport.js b/toolkit/content/aboutSupport.js
index b14bcba63f..9684e80ba7 100644
--- a/toolkit/content/aboutSupport.js
+++ b/toolkit/content/aboutSupport.js
@@ -56,31 +56,27 @@ var snapshotFormatters = {
     if (data.updateChannel)
       $("updatechannel-box").textContent = data.updateChannel;
 
-    let statusText = "unknown status";
+    let statusText = stringBundle().GetStringFromName("multiProcessStatus.unknown");
 
     // Whitelist of known values with string descriptions:
     switch (data.autoStartStatus) {
       case 0:
-        statusText = "Enabled by user"; break;
       case 1:
-        statusText = "Enabled by default"; break;
       case 2:
-        statusText = "Disabled"; break;
       case 4:
-        statusText = "Disabled by accessibility tools"; break;
       case 6:
-        statusText = "Disabled by unsupported text input"; break;
       case 7:
-        statusText = "Disabled by add-ons"; break;
       case 8:
-        statusText = "Disabled forcibly"; break;
+        statusText = stringBundle().GetStringFromName("multiProcessStatus." + data.autoStartStatus);
+        break;
 
       case 10:
         statusText = (Services.appinfo.OS == "Darwin" ? "OS X 10.6 - 10.8" : "Windows XP");
         break;
     }
 
-    $("multiprocess-box").textContent = data.numRemoteWindows + "/" + data.numTotalWindows + " (" + statusText + ")";
+    $("multiprocess-box").textContent = stringBundle().formatStringFromName("multiProcessWindows",
+      [data.numRemoteWindows, data.numTotalWindows, statusText], 3);
 
     $("safemode-box").textContent = data.safeMode;
   },
diff --git a/toolkit/content/aboutSupport.xhtml b/toolkit/content/aboutSupport.xhtml
index 839ee8eb55..58014c509a 100644
--- a/toolkit/content/aboutSupport.xhtml
+++ b/toolkit/content/aboutSupport.xhtml
@@ -240,7 +240,7 @@
 
           <tr>
             <th class="column">
-              Multiprocess Windows
+              &aboutSupport.appBasicsMultiProcessSupport;
             </th>
 
             <td id="multiprocess-box">
diff --git a/toolkit/locales/en-US/chrome/global/aboutSupport.dtd b/toolkit/locales/en-US/chrome/global/aboutSupport.dtd
index 96d9deef0d..8c4b4ddc6b 100644
--- a/toolkit/locales/en-US/chrome/global/aboutSupport.dtd
+++ b/toolkit/locales/en-US/chrome/global/aboutSupport.dtd
@@ -56,6 +56,8 @@ Windows/Mac use the term "Folder" instead of "Directory" -->
 
 <!ENTITY aboutSupport.appBasicsProfiles "Profiles">
 
+<!ENTITY aboutSupport.appBasicsMultiProcessSupport "Multiprocess Windows">
+
 <!ENTITY aboutSupport.appBasicsSafeMode "Safe Mode">
 
 <!ENTITY aboutSupport.showDir.label "Open Directory">
diff --git a/toolkit/locales/en-US/chrome/global/aboutSupport.properties b/toolkit/locales/en-US/chrome/global/aboutSupport.properties
index 46e445f66d..b452514158 100644
--- a/toolkit/locales/en-US/chrome/global/aboutSupport.properties
+++ b/toolkit/locales/en-US/chrome/global/aboutSupport.properties
@@ -101,6 +101,23 @@ gpuProcessKillButton = Terminate GPU Process
 minLibVersions = Expected minimum version
 loadedLibVersions = Version in use
 
+# LOCALIZATION NOTE %1$S and %2$S will be replaced with the number of remote and the total number
+# of windows, respectively, while %3$S will be replaced with one of the status strings below,
+# which contains a description of the multi-process preference and status.
+# Note: multiProcessStatus.3 doesn't exist because status=3 was deprecated.
+multiProcessWindows = %1$S/%2$S (%3$S)
+multiProcessStatus.0 = Enabled by user
+multiProcessStatus.1 = Enabled by default
+multiProcessStatus.2 = Disabled
+multiProcessStatus.4 = Disabled by accessibility tools
+multiProcessStatus.5 = Disabled by lack of graphics hardware acceleration on Mac OS X
+multiProcessStatus.6 = Disabled by unsupported text input
+multiProcessStatus.7 = Disabled by add-ons
+multiProcessStatus.8 = Disabled forcibly
+# No longer in use (bug 1296353) but we might bring this back.
+multiProcessStatus.9 = Disabled by graphics hardware acceleration on Windows XP
+multiProcessStatus.unknown = Unknown status
+
 asyncPanZoom = Asynchronous Pan/Zoom
 apzNone = none
 wheelEnabled = wheel input enabled