this hopefully fixes #134

src/js/static-net-filtering.js

@@ -833,13 +833,21 @@ FilterHostnameDict.prototype.meltBucket = function(len, bucket) {
     } else {
         var offset = 0;
         while ( offset < bucket.length ) {
-            map[bucket.substring(offset, len)] = true;
+            map[bucket.substr(offset, len)] = true;
             offset += len;
         }
     }
     return map;
 };
 
+FilterHostnameDict.prototype.freezeBucket = function(bucket) {
+    var hostnames = Object.keys(bucket);
+    if ( hostnames[0].length * hostnames.length < this.cutoff ) {
+        return ' ' + hostnames.join(' ') + ' ';
+    }
+    return hostnames.sort().join('');
+};
+
 // How the key is derived dictates the number and size of buckets:
 // - more bits = more buckets = higher memory footprint
 // - less bits = less buckets = lower memory footprint
@@ -887,7 +895,7 @@ FilterHostnameDict.prototype.add = function(hn) {
         return true;
     }
     if ( typeof bucket === 'string' ) {
-        bucket = this.dict[key] = this.meltBucket(hn.len, bucket);
+        bucket = this.dict[key] = this.meltBucket(hn.length, bucket);
     }
     if ( bucket.hasOwnProperty(hn) ) {
         return false;
@@ -899,19 +907,13 @@ FilterHostnameDict.prototype.add = function(hn) {
 
 FilterHostnameDict.prototype.freeze = function() {
     var buckets = this.dict;
-    var bucket, hostnames, len;
+    var bucket;
     for ( var key in buckets ) {
         bucket = buckets[key];
         if ( typeof bucket !== 'object' ) {
             continue;
         }
-        hostnames = Object.keys(bucket);
+        buckets[key] = this.freezeBucket(bucket);
-        len = hostnames[0].length * hostnames.length;
-        if ( hostnames[0].length * hostnames.length < this.cutoff ) {
-            buckets[key] = ' ' + hostnames.join(' ') + ' ';
-        } else {
-            buckets[key] = hostnames.sort().join('');
-        }
     }
 };
 
@@ -924,7 +926,7 @@ FilterHostnameDict.prototype.matchesExactly = function(hn) {
         return false;
     }
     if ( typeof bucket === 'object' ) {
-        return bucket.hasOwnProperty(hn);
+        bucket = this.dict[key] = this.freezeBucket(bucket);
     }
     if ( bucket.charAt(0) === ' ' ) {
         return bucket.indexOf(' ' + hn + ' ') !== -1;

src/js/storage.js

@@ -152,22 +152,26 @@
 
 /******************************************************************************/
 
-µBlock.appendUserFilters = function(filter) {
+µBlock.appendUserFilters = function(filters) {
-    if ( filter.length === 0 ) {
+    if ( filters.length === 0 ) {
         return;
     }
 
     var µb = this;
 
-    var onCompiledListLoaded = function(details) {
+    var onCompiledListLoaded = function() {
+        var compiledFilters = µb.compileFilters(filters);
         var snfe = µb.staticNetFilteringEngine;
         var cfe = µb.cosmeticFilteringEngine;
         var acceptedCount = snfe.acceptedCount + cfe.acceptedCount;
         var duplicateCount = snfe.duplicateCount + cfe.duplicateCount;
-        µb.applyCompiledFilters(details.content);
+        µb.applyCompiledFilters(compiledFilters);
         var entry = µb.remoteBlacklists[µb.userFiltersPath];
-        entry.entryCount = snfe.acceptedCount + cfe.acceptedCount - acceptedCount;
+        var deltaEntryCount = snfe.acceptedCount + cfe.acceptedCount - acceptedCount;
-        entry.entryUsedCount = entry.entryCount - snfe.duplicateCount - cfe.duplicateCount + duplicateCount;
+        var deltaEntryUsedCount = deltaEntryCount - (snfe.duplicateCount + cfe.duplicateCount - duplicateCount);
+        entry.entryCount += deltaEntryCount;
+        entry.entryUsedCount += deltaEntryUsedCount;
+        vAPI.storage.set({ 'remoteBlacklists': µb.remoteBlacklists });
         µb.staticNetFilteringEngine.freeze();
         µb.cosmeticFilteringEngine.freeze();
     };
@@ -187,7 +191,7 @@
         // If we reached this point, the filter quite probably needs to be
         // added for sure: do not try to be too smart, trying to avoid
         // duplicates at this point may lead to more issues.
-        µb.saveUserFilters(details.content.trim() + '\n\n' + filter.trim(), onSaved);
+        µb.saveUserFilters(details.content.trim() + '\n\n' + filters.trim(), onSaved);
     };
 
     this.loadUserFilters(onLoaded);