Backed out changeset e0cc363043ad (bug 1240959) for dt5 failures. r=backout on a CLOSED TREE

devtools/client/netmonitor/netmonitor-view.js

@@ -2223,14 +2223,7 @@ RequestsMenuView.prototype = Heritage.extend(WidgetMethods, {
     if (!aItemsArray.length) {
       return 0;
     }
-
-    let result = 0;
-    aItemsArray.forEach(item => {
-      let size = item.attachment.contentSize;
-      result += (typeof size == "number") ? size : 0;
-    });
-
-    return result;
+    return aItemsArray.reduce((prev, curr) => prev + curr.attachment.contentSize || 0, 0);
   },
 
   /**

devtools/shared/webconsole/network-monitor.js

@@ -388,13 +388,7 @@ NetworkResponseListener.prototype = {
 
     if (!response.mimeType || !NetworkHelper.isTextMimeType(response.mimeType)) {
       response.encoding = "base64";
-
-      try {
-        response.text = unescape(encodeURIComponent(response.text));
-      } catch (err) {
-        console.error(err);
-      }
-
+      response.text = btoa(response.text);
     }
 
     if (response.mimeType && this.request.contentCharset) {