diff --git a/src/chrome/content/rules/Booklooker.de.xml b/src/chrome/content/rules/Booklooker.de.xml
index d099131bd574..e55cf210b7b6 100644
--- a/src/chrome/content/rules/Booklooker.de.xml
+++ b/src/chrome/content/rules/Booklooker.de.xml
@@ -1,9 +1,20 @@
-<ruleset name="booklooker.de">
-  <target host="booklooker.de" />
-  <target host="*.booklooker.de" />
+<!--
+	Remark: dev, falco, images2 and stats have different
+		behavior over HTTP (refused) and HTTPS (403).
 
-  <securecookie host="^(?:www\.)?(?:images\.|secure\.)?booklooker\.de$" name=".+" />
+	Non-functional hosts
+		Different content:
+		- bjoerk.booklooker.de
+-->
+<ruleset name="booklooker.de">
+	<target host="booklooker.de" />
+	<target host="www.booklooker.de" />
+	<target host="api.booklooker.de" />
+	<target host="bms.booklooker.de" />
+	<target host="download.booklooker.de" />
+	<target host="images.booklooker.de" />
+	<test url="http://images.booklooker.de/m/9783833310539/Jenny-Colgan+Die-kleine-B%C3%A4ckerei-am-Strandweg.jpg" />
+	<target host="secure.booklooker.de" />
 
-  <rule from="^http://(?:www\.)?(?:secure\.)?booklooker\.de/" to="https://secure.booklooker.de/" />
-  <rule from="^http://(?:www\.)?images\.booklooker\.de/" to="https://images.booklooker.de/" />
+	<rule from="^http:" to="https:" />
 </ruleset>