diff --git a/drivers/firefox/content/xul/preferences.xul b/drivers/firefox/content/xul/preferences.xul
index 154bf8e48..6d05b92d5 100755
--- a/drivers/firefox/content/xul/preferences.xul
+++ b/drivers/firefox/content/xul/preferences.xul
@@ -49,8 +49,8 @@
 			<preference id="wappalyzer-cat32" name="extensions.wappalyzer.cat32" type="bool"/>
 			<preference id="wappalyzer-cat33" name="extensions.wappalyzer.cat33" type="bool"/>
 			<preference id="wappalyzer-cat34" name="extensions.wappalyzer.cat34" type="bool"/>
-			<preference id="wappalyzer-cat34" name="extensions.wappalyzer.cat35" type="bool"/>
-			<preference id="wappalyzer-cat34" name="extensions.wappalyzer.cat36" type="bool"/>
+			<preference id="wappalyzer-cat35" name="extensions.wappalyzer.cat35" type="bool"/>
+			<preference id="wappalyzer-cat36" name="extensions.wappalyzer.cat36" type="bool"/>
 
 			<preference id="wappalyzer-tracking" name="extensions.wappalyzer.tracking" type="bool"/>
 		</preferences>
@@ -98,7 +98,7 @@
 					</columns>
 					<rows>
 						<row>
-							<checkbox preference="wappalyzer-cat31" label="&wappalyzer.cat36;"/><!-- Advertising networks-->
+							<checkbox preference="wappalyzer-cat36" label="&wappalyzer.cat36;"/><!-- Advertising networks-->
 							<checkbox preference="wappalyzer-cat10" label="&wappalyzer.cat10;"/><!-- Analytics -->
 							<checkbox preference="wappalyzer-cat11" label="&wappalyzer.cat11;"/><!-- Blogs -->
 							<checkbox preference="wappalyzer-cat23" label="&wappalyzer.cat23;"/><!-- Cache tools -->
diff --git a/drivers/firefox/defaults/preferences/defaults.js b/drivers/firefox/defaults/preferences/defaults.js
index c6d284034..b170d4ec1 100644
--- a/drivers/firefox/defaults/preferences/defaults.js
+++ b/drivers/firefox/defaults/preferences/defaults.js
@@ -42,3 +42,4 @@ pref('extensions.wappalyzer.cat32',             true);
 pref('extensions.wappalyzer.cat33',             true);
 pref('extensions.wappalyzer.cat34',             true);
 pref('extensions.wappalyzer.cat35',             true);
+pref('extensions.wappalyzer.cat36',             true);