diff --git a/src/js/contentscript-end.js b/src/js/contentscript-end.js
index 518f83e0f..d79fe1650 100644
--- a/src/js/contentscript-end.js
+++ b/src/js/contentscript-end.js
@@ -259,15 +259,20 @@ var messager = vAPI.messaging.channel('contentscript-end.js');
                 node = nodeList[iNode];
                 attrValue = node.getAttribute(attr);
                 if ( !attrValue ) { continue; }
+                // Candidate 1 = generic form
+                // If specific form is injected, no need to process specific
+                // form, as the generic will affect all related specific forms
                 selector = '[' + attr + '="' + attrValue + '"]';
-                if ( generics[selector] ) {
+                if ( generics.hasOwnProperty(selector) ) {
                     if ( injectedSelectors.hasOwnProperty(selector) === false ) {
                         injectedSelectors[selector] = true;
                         out.push(selector);
+                        continue;
                     }
                 }
+                // Candidate 2 = specific form
                 selector = node.tagName.toLowerCase() + selector;
-                if ( generics[selector] ) {
+                if ( generics.hasOwnProperty(selector) ) {
                     if ( injectedSelectors.hasOwnProperty(selector) === false ) {
                         injectedSelectors[selector] = true;
                         out.push(selector);
diff --git a/src/js/cosmetic-filtering.js b/src/js/cosmetic-filtering.js
index e2a8f704a..0a95b0fc5 100644
--- a/src/js/cosmetic-filtering.js
+++ b/src/js/cosmetic-filtering.js
@@ -778,7 +778,9 @@ FilterContainer.prototype.freezeHighGenerics = function(what) {
     }
     var highHighGenericCount = 0;
 
-    var reHighLow = /^[a-z]*(\[(?:alt|title)="[^"]+"\])$/;
+    // https://github.com/gorhill/uBlock/issues/456
+    // Include tag name, it's part of the filter
+    var reHighLow = /^[a-z]*\[(?:alt|title)="[^"]+"\]$/;
     var reHighMedium = /^\[href\^="https?:\/\/([^"]{8})[^"]*"\]$/;
     var matches, hash;
 
@@ -788,8 +790,8 @@ FilterContainer.prototype.freezeHighGenerics = function(what) {
         }
         // ["title"] and ["alt"] will go in high-low generic bin.
         matches = reHighLow.exec(selector);
-        if ( matches && matches.length === 2 ) {
-            highLowGeneric[matches[1]] = true;
+        if ( matches && matches.length === 1 ) {
+            highLowGeneric[matches[0]] = true;
             highLowGenericCount += 1;
             continue;
         }