Bug 1664339. Stop incrementing the legacy printing UI telemetry counts when the new printing UI is in use. r=sfoster

Differential Revision: https://phabricator.services.mozilla.com/D89846

toolkit/components/printing/content/print.js

@@ -346,8 +346,9 @@ var PrintEventHandler = {
 
     try {
       this.settings.showPrintProgress = true;
-      await PrintUtils.printWindow(
-        this.previewBrowser.browsingContext,
+      let bc = this.previewBrowser.browsingContext;
+      await bc.top.embedderElement.print(
+        bc.currentWindowGlobal.outerWindowId,
         settings
       );
     } catch (e) {