Index: src/wp-admin/includes/ajax-actions.php
===================================================================
--- src/wp-admin/includes/ajax-actions.php	(revision 31031)
+++ src/wp-admin/includes/ajax-actions.php	(working copy)
@@ -2159,11 +2159,17 @@
 		wp_send_json_error();
 
 	$query = isset( $_REQUEST['query'] ) ? (array) $_REQUEST['query'] : array();
-	$query = array_intersect_key( $query, array_flip( array(
+	$keys = array(
 		's', 'order', 'orderby', 'posts_per_page', 'paged', 'post_mime_type',
 		'post_parent', 'post__in', 'post__not_in', 'year', 'monthnum'
-	) ) );
+	);
+	foreach ( get_taxonomies_for_attachments( 'objects' ) as $t ) {
+		if ( $t->query_var && isset( $query[ $t->query_var ] ) ) {
+			$keys[] = $t->query_var;
+		}
+	}
 
+	$query = array_intersect_key( $query, array_flip( $keys ) );
 	$query['post_type'] = 'attachment';
 	if ( MEDIA_TRASH
 		&& ! empty( $_REQUEST['query']['post_status'] )
Index: src/wp-admin/includes/post.php
===================================================================
--- src/wp-admin/includes/post.php	(revision 31031)
+++ src/wp-admin/includes/post.php	(working copy)
@@ -1021,32 +1021,34 @@
 }
 
 /**
- * Executes a query for attachments. An array of WP_Query arguments
- * can be passed in, which will override the arguments set by this function.
+ * Get the query vars for the current attachments request
  *
- * @since 2.5.0
+ * @since 4.2.0
  *
- * @param array|bool $q Array of query variables to use to build the query or false to use $_GET superglobal.
- * @return array
+ * @param array|false $q Array of query variables to use to build the query or false to use $_GET superglobal.
+ *
+ * @return array The parsed query vars.
  */
-function wp_edit_attachments_query( $q = false ) {
-	if ( false === $q )
+function wp_edit_attachments_query_vars( $q = false ) {
+	if ( false === $q ) {
 		$q = $_GET;
-
+	}
 	$q['m']   = isset( $q['m'] ) ? (int) $q['m'] : 0;
 	$q['cat'] = isset( $q['cat'] ) ? (int) $q['cat'] : 0;
 	$q['post_type'] = 'attachment';
 	$post_type = get_post_type_object( 'attachment' );
 	$states = 'inherit';
-	if ( current_user_can( $post_type->cap->read_private_posts ) )
+	if ( current_user_can( $post_type->cap->read_private_posts ) ) {
 		$states .= ',private';
+	}
 
 	$q['post_status'] = isset( $q['status'] ) && 'trash' == $q['status'] ? 'trash' : $states;
 	$q['post_status'] = isset( $q['attachment-filter'] ) && 'trash' == $q['attachment-filter'] ? 'trash' : $states;
 
 	$media_per_page = (int) get_user_option( 'upload_per_page' );
-	if ( empty( $media_per_page ) || $media_per_page < 1 )
+	if ( empty( $media_per_page ) || $media_per_page < 1 ) {
 		$media_per_page = 20;
+	}
 
 	/**
 	 * Filter the number of items to list per page when listing media items.
@@ -1058,10 +1060,9 @@
 	$q['posts_per_page'] = apply_filters( 'upload_per_page', $media_per_page );
 
 	$post_mime_types = get_post_mime_types();
-	$avail_post_mime_types = get_available_post_mime_types('attachment');
-
-	if ( isset($q['post_mime_type']) && !array_intersect( (array) $q['post_mime_type'], array_keys($post_mime_types) ) )
+	if ( isset($q['post_mime_type']) && !array_intersect( (array) $q['post_mime_type'], array_keys($post_mime_types) ) ) {
 		unset($q['post_mime_type']);
+	}
 
 	foreach( array_keys( $post_mime_types ) as $type ) {
 		if ( isset( $q['attachment-filter'] ) && "post_mime_type:$type" == $q['attachment-filter'] ) {
@@ -1074,9 +1075,25 @@
 		$q['post_parent'] = 0;
 	}
 
-	wp( $q );
+	return $q;
+}
 
-	return array($post_mime_types, $avail_post_mime_types);
+/**
+ * Executes a query for attachments. An array of WP_Query arguments
+ * can be passed in, which will override the arguments set by this function.
+ *
+ * @since 2.5.0
+ *
+ * @param array|false $q Array of query variables to use to build the query or false to use $_GET superglobal.
+ * @return array
+ */
+function wp_edit_attachments_query( $q = false ) {
+	wp( wp_edit_attachments_query_vars( $q ) );
+
+	$post_mime_types = get_post_mime_types();
+	$avail_post_mime_types = get_available_post_mime_types( 'attachment' );
+
+	return array( $post_mime_types, $avail_post_mime_types );
 }
 
 /**
Index: src/wp-admin/js/media.js
===================================================================
--- src/wp-admin/js/media.js	(revision 31031)
+++ src/wp-admin/js/media.js	(working copy)
@@ -1,4 +1,4 @@
-/* global ajaxurl, attachMediaBoxL10n */
+/* global ajaxurl, attachMediaBoxL10n, _wpMediaGridSettings */
 
 var findPosts;
 ( function( $ ){
@@ -72,13 +72,16 @@
 	};
 
 	$( document ).ready( function() {
-		var $mediaGridWrap = $( '#wp-media-grid' );
+		var settings, $mediaGridWrap = $( '#wp-media-grid' );
 
 		// Open up a manage media frame into the grid.
 		if ( $mediaGridWrap.length && window.wp && window.wp.media ) {
+			settings = _wpMediaGridSettings;
+
 			window.wp.media({
 				frame: 'manage',
-				container: $mediaGridWrap
+				container: $mediaGridWrap,
+				library: settings.queryVars
 			}).open();
 		}
 
Index: src/wp-admin/upload.php
===================================================================
--- src/wp-admin/upload.php	(revision 31031)
+++ src/wp-admin/upload.php	(working copy)
@@ -24,8 +24,13 @@
 	wp_enqueue_media();
 	wp_enqueue_script( 'media-grid' );
 	wp_enqueue_script( 'media' );
+
+	$vars = wp_edit_attachments_query_vars();
+	unset( $vars['mode'], $vars['post_type'], $vars['post_status'], $vars['posts_per_page'] );
+
 	wp_localize_script( 'media-grid', '_wpMediaGridSettings', array(
 		'adminUrl' => parse_url( self_admin_url(), PHP_URL_PATH ),
+		'queryVars' => $vars
 	) );
 
 	get_current_screen()->add_help_tab( array(