diff --git a/resources/scripts/adblock/adblock-server.js b/resources/scripts/adblock/adblock-server.js
index 5b0dd8c8b..4eb1f24d2 100755
--- a/resources/scripts/adblock/adblock-server.js
+++ b/resources/scripts/adblock/adblock-server.js
@@ -12,7 +12,8 @@
 // How to use:
 //     curl -i -X POST --data '
 //       {
-//         "url": "http://gompoozu.net",
+//         "url": "http://gompoozu.net/cwqcwq/js.js",
+//         "fp_url": "http://bbc.com",
 //         "url_type": "main_frame",
 //         "filter": true,
 //         "cosmetic": true
@@ -60,6 +61,7 @@ else {
           const jsonStruct = JSON.parse(jsonData.toString());
 
           const askUrl = jsonStruct['url'];
+          const askFpUrl = jsonStruct['fp_url'];
           const askFilter = jsonStruct['filter'];
           const askCosmetic = jsonStruct['cosmetic'];
           const askUrlType = jsonStruct['url_type'];
@@ -71,6 +73,7 @@ else {
             const adblockMatch = engine.match(adblock.Request.fromRawDetails({
               type: askUrlType,
               url: askUrl,
+              sourceUrl: askFpUrl
             }));
 
             resultJson["filter"] = adblockMatch;
diff --git a/src/librssguard/network-web/adblock/adblockmanager.cpp b/src/librssguard/network-web/adblock/adblockmanager.cpp
index 0d2438c2d..850f797a7 100644
--- a/src/librssguard/network-web/adblock/adblockmanager.cpp
+++ b/src/librssguard/network-web/adblock/adblockmanager.cpp
@@ -26,7 +26,7 @@
 
 AdBlockManager::AdBlockManager(QObject* parent)
   : QObject(parent), m_loaded(false), m_enabled(false), m_interceptor(new AdBlockUrlInterceptor(this)),
-  m_serverProcess(nullptr) {
+  m_serverProcess(nullptr), m_cacheBlocks({}) {
   m_adblockIcon = new AdBlockIcon(this);
   m_adblockIcon->setObjectName(QSL("m_adblockIconAction"));
   m_unifiedFiltersFile = qApp->userDataFolder() + QDir::separator() + QSL("adblock-unified-filters.txt");
@@ -38,21 +38,37 @@ AdBlockManager::~AdBlockManager() {
   }
 }
 
-BlockingResult AdBlockManager::block(const AdblockRequestInfo& request) const {
+BlockingResult AdBlockManager::block(const AdblockRequestInfo& request) {
   if (!isEnabled()) {
     return { false };
   }
 
   const QString url_string = request.requestUrl().toEncoded().toLower();
+  const QString firstparty_url_string = request.firstPartyUrl().toEncoded().toLower();
   const QString url_scheme = request.requestUrl().scheme().toLower();
+  const QPair<QString, QString> url_pair = { firstparty_url_string, url_string };
 
   if (!canRunOnScheme(url_scheme)) {
     return { false };
   }
   else {
     if (m_serverProcess != nullptr && m_serverProcess->state() == QProcess::ProcessState::Running) {
+      if (m_cacheBlocks.contains(url_pair)) {
+        qDebugNN << LOGSEC_ADBLOCK
+                 << "Found blocking data in cache, URL:"
+                 << QUOTE_W_SPACE_DOT(url_pair);
+
+        return m_cacheBlocks.value(url_pair);
+      }
+
       try {
-        auto result = askServerIfBlocked(url_string);
+        auto result = askServerIfBlocked(firstparty_url_string, url_string);
+
+        m_cacheBlocks.insert(url_pair, result);
+
+        qDebugNN << LOGSEC_ADBLOCK
+                 << "Inserted blocking data to cache for:"
+                 << QUOTE_W_SPACE_DOT(url_pair);
 
         return result;
       }
@@ -177,11 +193,12 @@ void AdBlockManager::showDialog() {
   AdBlockDialog(qApp->mainFormWidget()).exec();
 }
 
-BlockingResult AdBlockManager::askServerIfBlocked(const QString& url) const {
+BlockingResult AdBlockManager::askServerIfBlocked(const QString& fp_url, const QString& url) const {
   QJsonObject req_obj;
   QByteArray out;
   QElapsedTimer tmr;
 
+  req_obj["fp_url"] = fp_url;
   req_obj["url"] = url;
   req_obj["filter"] = true;
 
@@ -312,6 +329,8 @@ QProcess* AdBlockManager::restartServer(int port) {
 }
 
 void AdBlockManager::updateUnifiedFiltersFile() {
+  m_cacheBlocks.clear();
+
   if (QFile::exists(m_unifiedFiltersFile)) {
     QFile::remove(m_unifiedFiltersFile);
   }
diff --git a/src/librssguard/network-web/adblock/adblockmanager.h b/src/librssguard/network-web/adblock/adblockmanager.h
index c77173274..781765f50 100644
--- a/src/librssguard/network-web/adblock/adblockmanager.h
+++ b/src/librssguard/network-web/adblock/adblockmanager.h
@@ -5,6 +5,8 @@
 
 #include <QObject>
 
+#include <QHash>
+
 class QUrl;
 class QProcess;
 class AdblockRequestInfo;
@@ -15,6 +17,8 @@ struct BlockingResult {
   bool m_blocked;
   QString m_blockedByFilter;
 
+  BlockingResult() : m_blocked(false), m_blockedByFilter(QString()) {}
+
   BlockingResult(bool blocked, QString blocked_by_filter = {})
     : m_blocked(blocked), m_blockedByFilter(std::move(blocked_by_filter)) {}
 
@@ -38,7 +42,7 @@ class AdBlockManager : public QObject {
     AdBlockIcon* adBlockIcon() const;
 
     // General methods for adblocking.
-    BlockingResult block(const AdblockRequestInfo& request) const;
+    BlockingResult block(const AdblockRequestInfo& request);
     QString elementHidingRulesForDomain(const QUrl& url) const;
 
     QStringList filterLists() const;
@@ -58,7 +62,7 @@ class AdBlockManager : public QObject {
     void enabledChanged(bool enabled);
 
   private:
-    BlockingResult askServerIfBlocked(const QString& url) const;
+    BlockingResult askServerIfBlocked(const QString& fp_url, const QString& url) const;
     QString askServerForCosmeticRules(const QString& url) const;
     QProcess* restartServer(int port);
 
@@ -69,6 +73,7 @@ class AdBlockManager : public QObject {
     AdBlockUrlInterceptor* m_interceptor;
     QString m_unifiedFiltersFile;
     QProcess* m_serverProcess;
+    QHash<QPair<QString, QString>, BlockingResult> m_cacheBlocks;
 };
 
 inline AdBlockIcon* AdBlockManager::adBlockIcon() const {