revert and rewrite "Remove e10s info from about:support (f7f7224de)" to not relying on string bundle (i.e. becoming non-translable) in order to compatible to official language packs

toolkit/content/aboutSupport.js

@@ -53,6 +53,32 @@ var snapshotFormatters = {
     if (data.updateChannel)
       $("updatechannel-box").textContent = data.updateChannel;
 
+    let statusText = "unknown status";
+
+    // 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;
+
+      case 10:
+        statusText = (Services.appinfo.OS == "Darwin" ? "OS X 10.6 - 10.8" : "Windows XP");
+        break;
+    }
+
+    $("multiprocess-box").textContent = data.numRemoteWindows + "/" + data.numTotalWindows + " (" statusText + ")";
+
     $("safemode-box").textContent = data.safeMode;
   },
 

toolkit/content/aboutSupport.xhtml

@@ -234,6 +234,15 @@
             </td>
           </tr>
 
+          <tr>
+            <th class="column">
+              Multiprocess Windows
+            </th>
+
+            <td id="multiprocess-box">
+            </td>
+          </tr>
+
           <tr>
             <th class="column">
               &aboutSupport.appBasicsSafeMode;

toolkit/modules/Troubleshoot.jsm

@@ -220,6 +220,18 @@ var dataProviders = {
       }
     }
 
+    data.remoteAutoStart = Services.appinfo.browserTabsRemoteAutostart;
+
+    try {
+      let e10sStatus = Cc["@mozilla.org/supports-PRUint64;1"]
+                         .createInstance(Ci.nsISupportsPRUint64);
+      let appinfo = Services.appinfo.QueryInterface(Ci.nsIObserver);
+      appinfo.observe(e10sStatus, "getE10SBlocked", "");
+      data.autoStartStatus = e10sStatus.data;
+    } catch (e) {
+      data.autoStartStatus = -1;
+    }
+
     done(data);
   },
 

toolkit/modules/tests/browser/browser_Troubleshoot.js

@@ -126,6 +126,13 @@ const SNAPSHOT_SCHEMA = {
         supportURL: {
           type: "string",
         },
+        remoteAutoStart: {
+          type: "boolean",
+          required: true,
+        },
+        autoStartStatus: {
+          type: "number",
+        },
         numTotalWindows: {
           type: "number",
         },