--- a/devtools/client/framework/devtools-browser.js
+++ b/devtools/client/framework/devtools-browser.js
@@ -380,19 +380,18 @@ var gDevToolsBrowser = exports.gDevTools
       if (child == mm) {
         processId = i;
         break;
       }
     }
     if (processId) {
       return this._getContentProcessTarget(processId)
           .then(target => {
-            // Display a new toolbox, in a new window, with debugger by default
-            return gDevTools.showToolbox(target, "jsdebugger",
-                                         Toolbox.HostType.WINDOW);
+            // Display a new toolbox in a new window
+            return gDevTools.showToolbox(target, null, Toolbox.HostType.WINDOW);
           });
     }
 
     let msg = L10N.getStr("toolbox.noContentProcessForTab.message");
     Services.prompt.alert(null, "", msg);
     return Promise.reject(msg);
   },