diff --git a/src/js/cosmetic-filtering.js b/src/js/cosmetic-filtering.js
index e24d58c05..f12ff0506 100644
--- a/src/js/cosmetic-filtering.js
+++ b/src/js/cosmetic-filtering.js
@@ -617,6 +617,7 @@ FilterContainer.prototype.addGenericSelector = function(parsed) {
     if ( entries[parsed.suffix] === undefined ) {
         entries[parsed.suffix] = true;
     } else {
+        //console.log('cosmetic-filtering.js > FilterContainer.addGenericSelector(): duplicate filter "%s"', parsed.suffix);
         this.duplicateCount += 1;
     }
     this.acceptedCount += 1;
@@ -641,6 +642,7 @@ FilterContainer.prototype.addHostnameSelector = function(hostname, parsed) {
     } else if ( entry[parsed.suffix] === undefined ) {
         entry[parsed.suffix] = true;
     } else {
+        //console.log('cosmetic-filtering.js > FilterContainer.addHostnameSelector(): duplicate filter "%s"', parsed.suffix);
         this.duplicateCount += 1;
     }
     this.acceptedCount += 1;
@@ -660,6 +662,7 @@ FilterContainer.prototype.addEntitySelector = function(hostname, parsed) {
     } else if ( entry[parsed.suffix] === undefined ) {
         entry[parsed.suffix] = true;
     } else {
+        //console.log('cosmetic-filtering.js > FilterContainer.addEntitySelector(): duplicate filter "%s"', parsed.suffix);
         this.duplicateCount += 1;
     }
     this.acceptedCount += 1;
diff --git a/src/js/static-net-filtering.js b/src/js/static-net-filtering.js
index 4c350c875..6ef905c85 100644
--- a/src/js/static-net-filtering.js
+++ b/src/js/static-net-filtering.js
@@ -1553,11 +1553,11 @@ FilterContainer.prototype.makeCategoryKey = function(category) {
 
 /******************************************************************************/
 
-FilterContainer.prototype.add = function(s) {
+FilterContainer.prototype.add = function(raw) {
     // ORDER OF TESTS IS IMPORTANT!
 
     // Ignore empty lines
-    s = s.trim();
+    var s = raw.trim();
     if ( s.length === 0 ) {
         return false;
     }
@@ -1578,7 +1578,7 @@ FilterContainer.prototype.add = function(s) {
     // Ignore filters with unsupported options
     if ( parsed.unsupported ) {
         this.rejectedCount += 1;
-        // console.log('µBlock> abp-filter.js/FilterContainer.add(): unsupported filter "%s"', s);
+        //console.log('static-net-filtering.js > FilterContainer.add(): unsupported filter "%s"', raw);
         return false;
     }
 
@@ -1606,6 +1606,7 @@ FilterContainer.prototype.add = function(s) {
     }
 
     if ( this.duplicates[s] ) {
+        //console.log('static-net-filtering.js > FilterContainer.add(): duplicate filter "%s"', raw);
         this.duplicateCount++;
         return false;
     }