Bug 1245121 - Enable JSON Viewer on RELEASE_BUILD. r=Honza

devtools/client/preferences/devtools.js

@@ -325,11 +325,12 @@ pref("devtools.fontinspector.enabled", true);
 // version for each user.
 pref("devtools.telemetry.tools.opened.version", "{}");
 
-// Enable the JSON View tool (an inspector for application/json documents)
-#ifdef MOZ_DEV_EDITION
-  pref("devtools.jsonview.enabled", true);
+// Enable the JSON View tool (an inspector for application/json documents) on
+// Nightly and Dev. Edition.
+#ifdef RELEASE_BUILD
+pref("devtools.jsonview.enabled", false);
 #else
-  pref("devtools.jsonview.enabled", false);
+pref("devtools.jsonview.enabled", true);
 #endif
 
 // Disable the HTML responsive design tool by default.  Currently disabled until