diff --git a/integrations/class-wp-service-worker-admin-assets-integration.php b/integrations/class-wp-service-worker-admin-assets-integration.php
index fb36e5c78..8c19d3d65 100644
--- a/integrations/class-wp-service-worker-admin-assets-integration.php
+++ b/integrations/class-wp-service-worker-admin-assets-integration.php
@@ -9,6 +9,7 @@
  * Class representing the admin assets service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 final class WP_Service_Worker_Admin_Assets_Integration extends WP_Service_Worker_Base_Integration {
 
@@ -44,6 +45,26 @@ public function register( WP_Service_Worker_Scripts $scripts ) {
 			unset( $options['url'] );
 			$scripts->precaching_routes()->register( $url, $options );
 		}
+
+		// Add deprecation warning in user's console when service worker is installed.
+		$scripts->register(
+			__CLASS__ . '-deprecation',
+			array(
+				'src' => static function () {
+					return sprintf(
+						'console.warn( %s );',
+						wp_json_encode(
+							sprintf(
+								/* translators: %1$s: integration class name, %2$s: issue url */
+								__( 'The %1$s integration in the PWA plugin is no longer being considered WordPress core merge. See %2$s', 'pwa' ),
+								__CLASS__,
+								'https://github.com/GoogleChromeLabs/pwa-wp/issues/403'
+							)
+						)
+					);
+				},
+			)
+		);
 	}
 
 	/**
diff --git a/integrations/class-wp-service-worker-base-integration.php b/integrations/class-wp-service-worker-base-integration.php
index 3de96ea0d..a814594e5 100644
--- a/integrations/class-wp-service-worker-base-integration.php
+++ b/integrations/class-wp-service-worker-base-integration.php
@@ -9,6 +9,7 @@
  * Base class representing a service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 abstract class WP_Service_Worker_Base_Integration implements WP_Service_Worker_Integration {
 
diff --git a/integrations/class-wp-service-worker-custom-background-integration.php b/integrations/class-wp-service-worker-custom-background-integration.php
index b0595152f..7577ea331 100644
--- a/integrations/class-wp-service-worker-custom-background-integration.php
+++ b/integrations/class-wp-service-worker-custom-background-integration.php
@@ -9,6 +9,7 @@
  * Class representing the Custom Background service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 final class WP_Service_Worker_Custom_Background_Integration extends WP_Service_Worker_Base_Integration {
 
@@ -31,6 +32,26 @@ public function register( WP_Service_Worker_Scripts $scripts ) {
 			$revision = md5( file_get_contents( $file ) ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents, WordPressVIPMinimum.Performance.FetchingRemoteData.FileGetContentsUnknown
 		}
 		$scripts->precaching_routes()->register( $url, compact( 'revision' ) );
+
+		// Add deprecation warning in user's console when service worker is installed.
+		$scripts->register(
+			__CLASS__ . '-deprecation',
+			array(
+				'src' => static function () {
+					return sprintf(
+						'console.warn( %s );',
+						wp_json_encode(
+							sprintf(
+								/* translators: %1$s: integration class name, %2$s: issue url */
+								__( 'The %1$s integration in the PWA plugin is no longer being considered WordPress core merge. See %2$s', 'pwa' ),
+								__CLASS__,
+								'https://github.com/GoogleChromeLabs/pwa-wp/issues/403'
+							)
+						)
+					);
+				},
+			)
+		);
 	}
 
 	/**
diff --git a/integrations/class-wp-service-worker-custom-header-integration.php b/integrations/class-wp-service-worker-custom-header-integration.php
index 06fedcd79..02b771b8c 100644
--- a/integrations/class-wp-service-worker-custom-header-integration.php
+++ b/integrations/class-wp-service-worker-custom-header-integration.php
@@ -9,6 +9,7 @@
  * Class representing the Custom Header service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 final class WP_Service_Worker_Custom_Header_Integration extends WP_Service_Worker_Base_Integration {
 
@@ -70,6 +71,26 @@ public function register( WP_Service_Worker_Scripts $scripts ) {
 			}
 			$scripts->precaching_routes()->register( $header_image, compact( 'revision' ) );
 		}
+
+		// Add deprecation warning in user's console when service worker is installed.
+		$scripts->register(
+			__CLASS__ . '-deprecation',
+			array(
+				'src' => static function () {
+					return sprintf(
+						'console.warn( %s );',
+						wp_json_encode(
+							sprintf(
+								/* translators: %1$s: integration class name, %2$s: issue url */
+								__( 'The %1$s integration in the PWA plugin is no longer being considered WordPress core merge. See %2$s', 'pwa' ),
+								__CLASS__,
+								'https://github.com/GoogleChromeLabs/pwa-wp/issues/403'
+							)
+						)
+					);
+				},
+			)
+		);
 	}
 
 	/**
diff --git a/integrations/class-wp-service-worker-custom-logo-integration.php b/integrations/class-wp-service-worker-custom-logo-integration.php
index ea72d3c4c..78cda1b98 100644
--- a/integrations/class-wp-service-worker-custom-logo-integration.php
+++ b/integrations/class-wp-service-worker-custom-logo-integration.php
@@ -9,6 +9,7 @@
  * Class representing the Custom Logo service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 final class WP_Service_Worker_Custom_Logo_Integration extends WP_Service_Worker_Base_Integration {
 
@@ -38,6 +39,26 @@ public function register( WP_Service_Worker_Scripts $scripts ) {
 		foreach ( array_unique( $image_urls ) as $image_url ) {
 			$scripts->precaching_routes()->register( $image_url, array( 'revision' => $attachment->post_modified ) );
 		}
+
+		// Add deprecation warning in user's console when service worker is installed.
+		$scripts->register(
+			__CLASS__ . '-deprecation',
+			array(
+				'src' => static function () {
+					return sprintf(
+						'console.warn( %s );',
+						wp_json_encode(
+							sprintf(
+								/* translators: %1$s: integration class name, %2$s: issue url */
+								__( 'The %1$s integration in the PWA plugin is no longer being considered WordPress core merge. See %2$s', 'pwa' ),
+								__CLASS__,
+								'https://github.com/GoogleChromeLabs/pwa-wp/issues/403'
+							)
+						)
+					);
+				},
+			)
+		);
 	}
 
 	/**
diff --git a/integrations/class-wp-service-worker-fonts-integration.php b/integrations/class-wp-service-worker-fonts-integration.php
index eaa90b87f..97ea9b9ef 100644
--- a/integrations/class-wp-service-worker-fonts-integration.php
+++ b/integrations/class-wp-service-worker-fonts-integration.php
@@ -9,6 +9,7 @@
  * Class representing the Fonts service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 final class WP_Service_Worker_Fonts_Integration extends WP_Service_Worker_Base_Integration {
 
@@ -47,6 +48,26 @@ public function register( WP_Service_Worker_Scripts $scripts ) {
 				),
 			)
 		);
+
+		// Add deprecation warning in user's console when service worker is installed.
+		$scripts->register(
+			__CLASS__ . '-deprecation',
+			array(
+				'src' => static function () {
+					return sprintf(
+						'console.warn( %s );',
+						wp_json_encode(
+							sprintf(
+								/* translators: %1$s: integration class name, %2$s: issue url */
+								__( 'The %1$s integration in the PWA plugin is no longer being considered WordPress core merge. See %2$s', 'pwa' ),
+								__CLASS__,
+								'https://github.com/GoogleChromeLabs/pwa-wp/issues/403'
+							)
+						)
+					);
+				},
+			)
+		);
 	}
 
 	/**
diff --git a/integrations/class-wp-service-worker-scripts-integration.php b/integrations/class-wp-service-worker-scripts-integration.php
index 1fe6ab4ab..ce55b8b0f 100644
--- a/integrations/class-wp-service-worker-scripts-integration.php
+++ b/integrations/class-wp-service-worker-scripts-integration.php
@@ -9,6 +9,7 @@
  * Class representing the Scripts service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 final class WP_Service_Worker_Scripts_Integration extends WP_Service_Worker_Base_Integration {
 
@@ -101,6 +102,26 @@ public function register( WP_Service_Worker_Scripts $scripts ) {
 		$scripts->precaching_routes()->register_emoji_script();
 
 		wp_scripts()->to_do = $original_to_do; // Restore original scripts to do.
+
+		// Add deprecation warning in user's console when service worker is installed.
+		$scripts->register(
+			__CLASS__ . '-deprecation',
+			array(
+				'src' => static function () {
+					return sprintf(
+						'console.warn( %s );',
+						wp_json_encode(
+							sprintf(
+								/* translators: %1$s: integration class name, %2$s: issue url */
+								__( 'The %1$s integration in the PWA plugin is no longer being considered WordPress core merge. See %2$s', 'pwa' ),
+								__CLASS__,
+								'https://github.com/GoogleChromeLabs/pwa-wp/issues/403'
+							)
+						)
+					);
+				},
+			)
+		);
 	}
 
 	/**
diff --git a/integrations/class-wp-service-worker-site-icon-integration.php b/integrations/class-wp-service-worker-site-icon-integration.php
index 93928bfdc..4716c7f5a 100644
--- a/integrations/class-wp-service-worker-site-icon-integration.php
+++ b/integrations/class-wp-service-worker-site-icon-integration.php
@@ -9,6 +9,7 @@
  * Class representing the Site Icon service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 final class WP_Service_Worker_Site_Icon_Integration extends WP_Service_Worker_Base_Integration {
 
@@ -43,6 +44,26 @@ public function register( WP_Service_Worker_Scripts $scripts ) {
 		foreach ( $image_urls as $image_url ) {
 			$scripts->precaching_routes()->register( $image_url, array( 'revision' => $attachment->post_modified ) );
 		}
+
+		// Add deprecation warning in user's console when service worker is installed.
+		$scripts->register(
+			__CLASS__ . '-deprecation',
+			array(
+				'src' => static function () {
+					return sprintf(
+						'console.warn( %s );',
+						wp_json_encode(
+							sprintf(
+								/* translators: %1$s: integration class name, %2$s: issue url */
+								__( 'The %1$s integration in the PWA plugin is no longer being considered WordPress core merge. See %2$s', 'pwa' ),
+								__CLASS__,
+								'https://github.com/GoogleChromeLabs/pwa-wp/issues/403'
+							)
+						)
+					);
+				},
+			)
+		);
 	}
 
 	/**
diff --git a/integrations/class-wp-service-worker-styles-integration.php b/integrations/class-wp-service-worker-styles-integration.php
index 33cdf0544..a037969c8 100644
--- a/integrations/class-wp-service-worker-styles-integration.php
+++ b/integrations/class-wp-service-worker-styles-integration.php
@@ -9,6 +9,7 @@
  * Class representing the Styles service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 final class WP_Service_Worker_Styles_Integration extends WP_Service_Worker_Base_Integration {
 
@@ -98,6 +99,26 @@ public function register( WP_Service_Worker_Scripts $scripts ) {
 			}
 		}
 		wp_styles()->to_do = $original_to_do; // Restore original styles to do.
+
+		// Add deprecation warning in user's console when service worker is installed.
+		$scripts->register(
+			__CLASS__ . '-deprecation',
+			array(
+				'src' => static function () {
+					return sprintf(
+						'console.warn( %s );',
+						wp_json_encode(
+							sprintf(
+								/* translators: %1$s: integration class name, %2$s: issue url */
+								__( 'The %1$s integration in the PWA plugin is no longer being considered WordPress core merge. See %2$s', 'pwa' ),
+								__CLASS__,
+								'https://github.com/GoogleChromeLabs/pwa-wp/issues/403'
+							)
+						)
+					);
+				},
+			)
+		);
 	}
 
 	/**
diff --git a/integrations/functions.php b/integrations/functions.php
index 3b41ba95f..62ad8bded 100644
--- a/integrations/functions.php
+++ b/integrations/functions.php
@@ -29,6 +29,7 @@
  *     );
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  *
  * @param WP_Service_Worker_Scripts $scripts Instance to register service worker behavior with.
  */
diff --git a/integrations/interface-wp-service-worker-integration.php b/integrations/interface-wp-service-worker-integration.php
index 18f3b12f3..9f1a7f8f1 100644
--- a/integrations/interface-wp-service-worker-integration.php
+++ b/integrations/interface-wp-service-worker-integration.php
@@ -9,6 +9,7 @@
  * Interface representing a service worker integration.
  *
  * @since 0.2
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
  */
 interface WP_Service_Worker_Integration {
 
@@ -16,6 +17,7 @@ interface WP_Service_Worker_Integration {
 	 * Gets the scope this integration applies to.
 	 *
 	 * @since 0.2
+	 * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
 	 *
 	 * @return int Either WP_Service_Workers::SCOPE_FRONT, WP_Service_Workers::SCOPE_ADMIN, or
 	 *             WP_Service_Workers::SCOPE_ALL.
@@ -26,6 +28,7 @@ public function get_scope();
 	 * Gets the priority this integration should be hooked into the service worker action with.
 	 *
 	 * @since 0.2
+	 * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
 	 *
 	 * @return int Hook priority. A higher number means a lower priority.
 	 */
@@ -35,6 +38,7 @@ public function get_priority();
 	 * Registers the integration functionality.
 	 *
 	 * @since 0.2
+	 * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
 	 *
 	 * @param WP_Service_Worker_Scripts $scripts Instance to register service worker behavior with.
 	 */
diff --git a/pwa.php b/pwa.php
index d8f0d69eb..e7368dfac 100644
--- a/pwa.php
+++ b/pwa.php
@@ -271,25 +271,6 @@ function _pwa_deactivate_plugin() {
 
 register_deactivation_hook( PWA_PLUGIN_FILE, '_pwa_deactivate_plugin' );
 
-/**
- * Load service worker integrations.
- *
- * @since 0.2.0
- *
- * @param WP_Service_Worker_Scripts $scripts Instance to register service worker behavior with.
- */
-function pwa_load_service_worker_integrations( WP_Service_Worker_Scripts $scripts ) {
-	if ( ! current_theme_supports( 'service_worker' ) ) {
-		return;
-	}
-
-	/** WordPress Service Worker Integration Functions */
-	require_once PWA_PLUGIN_DIR . '/integrations/functions.php';
-
-	pwa_register_service_worker_integrations( $scripts );
-}
-add_action( 'wp_default_service_workers', 'pwa_load_service_worker_integrations', -1 );
-
 $wp_web_app_manifest = new WP_Web_App_Manifest();
 $wp_web_app_manifest->init();
 
diff --git a/wp-includes/deprecated.php b/wp-includes/deprecated.php
index 15d9511de..4af845261 100644
--- a/wp-includes/deprecated.php
+++ b/wp-includes/deprecated.php
@@ -85,3 +85,23 @@ function wp_disable_script_concatenation() {
 	}
 	// phpcs:enable
 }
+
+/**
+ * Load service worker integrations.
+ *
+ * @since 0.2.0
+ * @deprecated 0.7 Integrations will not be proposed for WordPress core merge.
+ *
+ * @param WP_Service_Worker_Scripts $scripts Instance to register service worker behavior with.
+ */
+function pwa_load_service_worker_integrations( WP_Service_Worker_Scripts $scripts ) {
+	if ( ! current_theme_supports( 'service_worker' ) ) {
+		return;
+	}
+
+	/** WordPress Service Worker Integration Functions */
+	require_once PWA_PLUGIN_DIR . '/integrations/functions.php';
+
+	pwa_register_service_worker_integrations( $scripts );
+}
+add_action( 'wp_default_service_workers', 'pwa_load_service_worker_integrations', -1 );