installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/Extension_NewRelic_Widget_View_Browser.php

@@ -0,0 +1,13 @@
+<?php
+namespace W3TC;
+
+if ( ! defined( 'W3TC' ) ) {
+	die();
+}
+?>
+<?php esc_html_e( 'Metrics are not available for browser applications', 'w3-total-cache' ); ?>
+<p>
+	<a href="<?php echo esc_url( W3TC_NEWRELIC_SIGNUP_URL ); ?>" target="_blank">
+		<?php esc_html_e( 'Upgrade your New Relic account to enable more metrics.', 'w3-total-cache' ); ?>
+	</a>
+</p>