diff --git a/wp-ffpc-backend.php b/wp-ffpc-backend.php
index 99889be..de6fa40 100644
--- a/wp-ffpc-backend.php
+++ b/wp-ffpc-backend.php
@@ -77,6 +77,20 @@ class WP_FFPC_Backend {
 		$this->log (  __translate__('init starting', $this->plugin_constant ));
 		$this->$init();
 
+
+		if (is_admin() && function_exists('add_filter')) {
+			add_filter('wp_ffpc_clear_keys_array', function($to_clear, $options) {
+				$filtered_result = array();
+				foreach ( $to_clear as $link => $dummy ) {
+					/* clear feeds, meta and data as well */
+					$filtered_result[ $options[ 'prefix_meta' ] . $link ] = true;
+					$filtered_result[ $options[ 'prefix_data' ] . $link ] = true;
+					$filtered_result[ $options[ 'prefix_meta' ] . $link . 'feed' ] = true;
+					$filtered_result[ $options[ 'prefix_data' ] . $link . 'feed' ] = true;
+				}
+				return $filtered_result;
+			}, 10, 2);
+		}
 	}
 
 
@@ -106,11 +120,14 @@ class WP_FFPC_Backend {
 	 * build key to make requests with
 	 *
 	 * @param string $prefix prefix to add to prefix
+	 * @param array $customUrimap to override defaults
 	 *
 	 */
-	public function key ( &$prefix ) {
+	public function key ( $prefix, $customUrimap = null ) {
+		$urimap = $customUrimap ?: $this->urimap;
+
 		/* data is string only with content, meta is not used in nginx */
-		$key = $prefix . self::map_urimap($this->urimap, $this->options['key']);
+		$key = $prefix . self::map_urimap($urimap, $this->options['key']);
 		$this->log ( sprintf( __translate__( 'original key configuration: %s', $this->plugin_constant ),  $this->options['key'] ) );
 		$this->log ( sprintf( __translate__( 'setting key to: %s', $this->plugin_constant ),  $key ) );
 		return $key;
@@ -283,19 +300,12 @@ class WP_FFPC_Backend {
 		/* Hook to custom clearing array. */
 		$to_clear = apply_filters('wp_ffpc_to_clear_array', $to_clear, $post_id);
 
-		foreach ( $to_clear as $link => $dummy ) {
-			/* clear all feeds as well */
-			$to_clear[ $link. 'feed' ] = true;
-		}
-
-		/* add data & meta prefixes */
-		foreach ( $to_clear as $link => $dummy ) {
-			unset ( $to_clear [ $link ]);
-			$to_clear[ $this->options[ 'prefix_meta' ] . $link ] = true;
-			$to_clear[ $this->options[ 'prefix_data' ] . $link ] = true;
-		}
-
 		/* run clear */
+		$this->clear_keys( $to_clear );
+	}
+
+	public function clear_keys( $keys ) {
+		$to_clear = apply_filters('wp_ffpc_clear_keys_array', $keys, $this->options);
 		$internal = $this->proxy ( 'clear' );
 		$this->$internal ( $to_clear );
 	}
diff --git a/wp-ffpc-class.php b/wp-ffpc-class.php
index 58e8eb9..66e172c 100644
--- a/wp-ffpc-class.php
+++ b/wp-ffpc-class.php
@@ -445,13 +445,12 @@ class WP_FFPC extends PluginAbstract {
 		<form autocomplete="off" method="post" action="#" id="<?php echo $this->plugin_constant ?>-settings" class="plugin-admin">
 
 			<?php wp_nonce_field( $this->plugin_constant ); ?>
+
+			<?php $switcher_tabs = $this->plugin_admin_panel_get_tabs(); ?>
 			<ul class="tabs">
-				<li><a href="#<?php echo $this->plugin_constant ?>-type" class="wp-switch-editor"><?php _e( 'Cache type', $this->plugin_constant ); ?></a></li>
-				<li><a href="#<?php echo $this->plugin_constant ?>-debug" class="wp-switch-editor"><?php _e( 'Debug & in-depth', $this->plugin_constant ); ?></a></li>
-				<li><a href="#<?php echo $this->plugin_constant ?>-exceptions" class="wp-switch-editor"><?php _e( 'Cache exceptions', $this->plugin_constant ); ?></a></li>
-				<li><a href="#<?php echo $this->plugin_constant ?>-servers" class="wp-switch-editor"><?php _e( 'Backend settings', $this->plugin_constant ); ?></a></li>
-				<li><a href="#<?php echo $this->plugin_constant ?>-nginx" class="wp-switch-editor"><?php _e( 'nginx', $this->plugin_constant ); ?></a></li>
-				<li><a href="#<?php echo $this->plugin_constant ?>-precache" class="wp-switch-editor"><?php _e( 'Precache & precache log', $this->plugin_constant ); ?></a></li>
+				<?php foreach($switcher_tabs AS $tab_section => $tab_label): ?>
+				<li><a href="#<?= $this->plugin_constant ?>-<?= $tab_section ?>" class="wp-switch-editor"><?= $tab_label ?></a></li>
+				<?php endforeach; ?>
 			</ul>
 
 			<fieldset id="<?php echo $this->plugin_constant ?>-type">
@@ -785,6 +784,8 @@ class WP_FFPC extends PluginAbstract {
 			<?php } ?>
 			</fieldset>
 
+			<?php do_action('wp_ffpc_admin_panel_tabs_extra_content', $this->plugin_constant); ?>
+
 			<p class="clear">
 				<input class="button-primary" type="submit" name="<?php echo $this->button_save ?>" id="<?php echo $this->button_save ?>" value="<?php _e('Save Changes', $this->plugin_constant ) ?>" />
 			</p>
@@ -844,6 +845,19 @@ class WP_FFPC extends PluginAbstract {
 		<?php
 	}
 
+	private function plugin_admin_panel_get_tabs() {
+		$default_tabs = array(
+			'type' => __( 'Cache type', $this->plugin_constant ),
+			'debug' => __( 'Debug & in-depth', $this->plugin_constant ),
+			'exceptions' => __( 'Cache exceptions', $this->plugin_constant ),
+			'servers' => __( 'Backend settings', $this->plugin_constant ),
+			'nginx' => __( 'nginx', $this->plugin_constant ),
+			'precache' => __( 'Precache & precache log', $this->plugin_constant )
+		);
+
+		return apply_filters('wp_ffpc_admin_panel_tabs', $default_tabs);
+	}
+
 	/**
 	 * extending options_save
 	 *
@@ -1250,6 +1264,10 @@ class WP_FFPC extends PluginAbstract {
 			$this->utils->log ( $this->plugin_constant, $message, $log_level );
 	}
 
+	public function getBackend() {
+		return $this->backend;
+	}
+
 }
 
 endif;
diff --git a/wp-ffpc.php b/wp-ffpc.php
index 2cf4c77..de9c952 100644
--- a/wp-ffpc.php
+++ b/wp-ffpc.php
@@ -3,7 +3,7 @@
 Plugin Name: WP-FFPC
 Plugin URI: https://github.com/petermolnar/wp-ffpc
 Description: WordPress in-memory full page cache plugin
-Version: 1.7.7
+Version: 1.7.8
 Author: Peter Molnar <hello@petermolnar.eu>
 Author URI: http://petermolnar.eu/
 License: GPLv3