--- a/devtools/client/netmonitor/initializer.js
+++ b/devtools/client/netmonitor/initializer.js
@@ -76,17 +76,18 @@ if (window.location.protocol === "chrome
     targetFromURL,
   } = require("devtools/client/framework/target-from-url");
 
   (async function() {
     try {
       const target = await targetFromURL(url);
 
       // Start the network event listening as it is done in the toolbox code
-      await target.activeConsole.startListeners(["NetworkActivity"]);
+      const consoleFront = await target.getFront("console");
+      await consoleFront.startListeners(["NetworkActivity"]);
 
       // Create a fake toolbox object
       const toolbox = {
         target,
         viewSourceInDebugger() {
           throw new Error(
             "toolbox.viewSourceInDebugger is not implement from a tab"
           );

--- a/devtools/client/netmonitor/src/connector/firefox-connector.js
+++ b/devtools/client/netmonitor/src/connector/firefox-connector.js
@@ -53,17 +53,17 @@ class FirefoxConnector {
     this.actions = actions;
     this.getState = getState;
     this.tabTarget = connection.tabConnection.tabTarget;
     this.toolbox = connection.toolbox;
 
     // The owner object (NetMonitorAPI) received all events.
     this.owner = connection.owner;
 
-    this.webConsoleFront = this.tabTarget.activeConsole;
+    this.webConsoleFront = await this.tabTarget.getFront("console");
 
     this.dataProvider = new FirefoxDataProvider({
       webConsoleFront: this.webConsoleFront,
       actions: this.actions,
       owner: this.owner,
     });
 
     // Register all listeners

--- a/devtools/client/netmonitor/src/har/har-automation.js
+++ b/devtools/client/netmonitor/src/har/har-automation.js
@@ -54,23 +54,23 @@ HarAutomation.prototype = {
 
     if (this.tabWatcher) {
       this.tabWatcher.disconnect();
     }
   },
 
   // Automation
 
-  startMonitoring: function(client, callback) {
+  startMonitoring: async function(client, callback) {
     if (!client) {
       return;
     }
 
     this.debuggerClient = client;
-    this.webConsoleFront = this.toolbox.target.activeConsole;
+    this.webConsoleFront = await this.toolbox.target.getFront("console");
 
     this.tabWatcher = new TabWatcher(this.toolbox, this);
     this.tabWatcher.connect();
   },
 
   pageLoadBegin: function(response) {
     this.resetCollector();
   },

--- a/devtools/client/netmonitor/test/head.js
+++ b/devtools/client/netmonitor/test/head.js
@@ -357,25 +357,28 @@ function initNetMonitor(url, enableCache
       info("Disabling cache and reloading page.");
       const requestsDone = waitForAllRequestsFinished(monitor);
       const markersDone = waitForTimelineMarkers(monitor);
       await toggleCache(target, true);
       await Promise.all([requestsDone, markersDone]);
       info(
         "Cache disabled when the current and all future toolboxes are open."
       );
+
+      const consoleFront = await target.getFront("console");
+
       // Remove any requests generated by the reload while toggling the cache to
       // avoid interfering with the test.
       isnot(
-        [...target.activeConsole.getNetworkEvents()].length,
+        [...consoleFront.getNetworkEvents()].length,
         0,
         "Request to reconfigure the tab was recorded."
       );
       info("Clearing requests in the console client.");
-      target.activeConsole.clearNetworkRequests();
+      await consoleFront.clearNetworkRequests();
       info("Clearing requests in the UI.");
 
       store.dispatch(Actions.clearRequests());
     }
 
     return { tab, monitor, toolbox };
   })();
 }