diff --git a/browser/devtools/netmonitor/netmonitor-view.js b/browser/devtools/netmonitor/netmonitor-view.js
index 17fde350935..b2a2aeb7f5a 100644
--- a/browser/devtools/netmonitor/netmonitor-view.js
+++ b/browser/devtools/netmonitor/netmonitor-view.js
@@ -1048,9 +1048,16 @@ create({ constructor: NetworkDetailsView, proto: MenuContainer.prototype }, {
       // Handle json.
       if (mimeType.contains("/json")) {
         $("#response-content-json-box").hidden = false;
-        let jsonScope = this._json.addScope("JSON");
-        let sanitizedText = aString.replace(/^[a-zA-Z0-9_$]+\(|\)$/g, ""); // JSONP
-        jsonScope.addVar().populate(JSON.parse(sanitizedText), { expanded: true });
+        let jsonpRegex = /^[a-zA-Z0-9_$]+\(|\)$/g; // JSONP with callback.
+        let sanitizedJSON = aString.replace(jsonpRegex, "");
+        let callbackPadding = aString.match(jsonpRegex);
+
+        let jsonScopeName = callbackPadding
+          ? L10N.getFormatStr("jsonpScopeName", callbackPadding[0].slice(0, -1))
+          : L10N.getStr("jsonScopeName");
+
+        let jsonScope = this._json.addScope(jsonScopeName);
+        jsonScope.addVar().populate(JSON.parse(sanitizedJSON), { expanded: true });
         jsonScope.expanded = true;
       }
       // Handle images.
diff --git a/browser/devtools/netmonitor/test/browser_net_content-type.js b/browser/devtools/netmonitor/test/browser_net_content-type.js
index 9230541a2fd..82eb286ce95 100644
--- a/browser/devtools/netmonitor/test/browser_net_content-type.js
+++ b/browser/devtools/netmonitor/test/browser_net_content-type.js
@@ -166,7 +166,8 @@ function test() {
             let jsonScope = tabpanel.querySelectorAll(".variables-view-scope")[0];
 
             is(jsonScope.querySelector(".name").getAttribute("value"),
-              "JSON", "The json scope doesn't have the correct title.");
+              L10N.getStr("jsonScopeName"),
+              "The json scope doesn't have the correct title.");
 
             is(jsonScope.querySelectorAll(".variables-view-property .name")[0].getAttribute("value"),
               "greeting", "The first json property name was incorrect.");
diff --git a/browser/devtools/netmonitor/test/browser_net_json-long.js b/browser/devtools/netmonitor/test/browser_net_json-long.js
index 0a38a014fa4..613a3a1a978 100644
--- a/browser/devtools/netmonitor/test/browser_net_json-long.js
+++ b/browser/devtools/netmonitor/test/browser_net_json-long.js
@@ -2,7 +2,7 @@
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 /**
- * Tests if JSONP responses are handled correctly.
+ * Tests if very long JSON responses are handled correctly.
  */
 
 function test() {
@@ -70,7 +70,8 @@ function test() {
         let values = ".variables-view-property .value";
 
         is(jsonScope.querySelector(".name").getAttribute("value"),
-          "JSON", "The json scope doesn't have the correct title.");
+          L10N.getStr("jsonScopeName"),
+          "The json scope doesn't have the correct title.");
 
         is(jsonScope.querySelectorAll(names)[0].getAttribute("value"),
           "0", "The first json property name was incorrect.");
diff --git a/browser/devtools/netmonitor/test/browser_net_jsonp.js b/browser/devtools/netmonitor/test/browser_net_jsonp.js
index 727bcf4e946..b3f8cd8d547 100644
--- a/browser/devtools/netmonitor/test/browser_net_jsonp.js
+++ b/browser/devtools/netmonitor/test/browser_net_jsonp.js
@@ -62,7 +62,8 @@ function test() {
         let jsonScope = tabpanel.querySelectorAll(".variables-view-scope")[0];
 
         is(jsonScope.querySelector(".name").getAttribute("value"),
-          "JSON", "The json scope doesn't have the correct title.");
+          L10N.getFormatStr("jsonpScopeName", "$_0123Fun"),
+          "The json scope doesn't have the correct title.");
 
         is(jsonScope.querySelectorAll(".variables-view-property .name")[0].getAttribute("value"),
           "greeting", "The first json property name was incorrect.");
diff --git a/browser/locales/en-US/chrome/browser/devtools/netmonitor.properties b/browser/locales/en-US/chrome/browser/devtools/netmonitor.properties
index bd51a26a0d8..b3bddaf8a00 100644
--- a/browser/locales/en-US/chrome/browser/devtools/netmonitor.properties
+++ b/browser/locales/en-US/chrome/browser/devtools/netmonitor.properties
@@ -89,6 +89,14 @@ responseCookies=Response cookies
 # in the response tab of the network details pane for the JSON filtering input.
 jsonFilterText=Filter properties
 
+# LOCALIZATION NOTE (jsonScopeName): This is the text displayed
+# in the response tab of the network details pane for a JSON scope.
+jsonScopeName=JSON
+
+# LOCALIZATION NOTE (jsonpScopeName): This is the text displayed
+# in the response tab of the network details pane for a JSONP scope.
+jsonpScopeName=JSONP → callback %S()
+
 # LOCALIZATION NOTE (networkMenu.size): This is the label displayed
 # in the network menu specifying the size of a request (in kilobytes).
 networkMenu.sizeKB=%S KB