diff --git a/resources/desktop/com.github.rssguard.appdata.xml b/resources/desktop/com.github.rssguard.appdata.xml
index 27d94511c..5a11f9741 100644
--- a/resources/desktop/com.github.rssguard.appdata.xml
+++ b/resources/desktop/com.github.rssguard.appdata.xml
@@ -30,7 +30,7 @@
   <url type="donation">https://martinrotter.github.io/donate/</url>
   <content_rating type="oars-1.1" />
   <releases>
-    <release version="3.9.0" date="2021-05-07"/>
+    <release version="3.9.2" date="2021-05-07"/>
   </releases>
   <content_rating type="oars-1.0">
     <content_attribute id="violence-cartoon">none</content_attribute>
diff --git a/resources/scripts/github-actions/build-windows.ps1 b/resources/scripts/github-actions/build-windows.ps1
index e718ab761..7efccbf6a 100755
--- a/resources/scripts/github-actions/build-windows.ps1
+++ b/resources/scripts/github-actions/build-windows.ps1
@@ -23,7 +23,7 @@ $qt_version = "5.15.2"
 $qt_link = "https://github.com/qt/qtbase/archive/$qt_version.zip"
 $qt_output = "qt.zip"
 
-$maria_version = "10.5.8"
+$maria_version = "10.5.9"
 $maria_link = "https://downloads.mariadb.org/f/mariadb-$maria_version/winx64-packages/mariadb-$maria_version-winx64.zip/from/https%3A//mirror.vpsfree.cz/mariadb/?serve"
 $maria_output = "maria.zip"
 
diff --git a/src/librssguard/network-web/adblock/adblockmanager.cpp b/src/librssguard/network-web/adblock/adblockmanager.cpp
index 29619761c..af3f75450 100644
--- a/src/librssguard/network-web/adblock/adblockmanager.cpp
+++ b/src/librssguard/network-web/adblock/adblockmanager.cpp
@@ -58,8 +58,9 @@ BlockingResult AdBlockManager::block(const AdblockRequestInfo& request) const {
       }
       catch (const ApplicationException& ex) {
         qCriticalNN << LOGSEC_ADBLOCK
-                    << "HTTP error when calling server:"
+                    << "HTTP error when calling server for blocking rules:"
                     << QUOTE_W_SPACE_DOT(ex.message());
+        return { false };
       }
     }
     else {
@@ -105,8 +106,22 @@ bool AdBlockManager::canRunOnScheme(const QString& scheme) const {
 }
 
 QString AdBlockManager::elementHidingRulesForDomain(const QUrl& url) const {
-  // TODO: call service for cosmetic rules.
-  return {};
+  if (m_serverProcess->state() == QProcess::ProcessState::Running) {
+    try {
+      auto result = askServerForCosmeticRules(url.toString());
+
+      return result;
+    }
+    catch (const ApplicationException& ex) {
+      qCriticalNN << LOGSEC_ADBLOCK
+                  << "HTTP error when calling server for cosmetic rules:"
+                  << QUOTE_W_SPACE_DOT(ex.message());
+      return {};
+    }
+  }
+  else {
+    return {};
+  }
 }
 
 QStringList AdBlockManager::filterLists() const {
@@ -168,7 +183,7 @@ BlockingResult AdBlockManager::askServerIfBlocked(const QString& url) const {
 
   if (network_res.first == QNetworkReply::NetworkError::NoError) {
     qDebugNN << LOGSEC_ADBLOCK
-             << "Query to server took "
+             << "Query for blocking info to server took "
              << tmr.elapsed()
              << " ms.";
 
@@ -187,6 +202,41 @@ BlockingResult AdBlockManager::askServerIfBlocked(const QString& url) const {
   }
 }
 
+QString AdBlockManager::askServerForCosmeticRules(const QString& url) const {
+  QJsonObject req_obj;
+  QByteArray out;
+  QElapsedTimer tmr;
+
+  req_obj["url"] = url;
+  req_obj["cosmetic"] = true;
+
+  tmr.start();
+
+  auto network_res = NetworkFactory::performNetworkOperation(QSL("http://%1:%2").arg(QHostAddress(QHostAddress::SpecialAddress::LocalHost).toString(),
+                                                                                     ADBLOCK_SERVER_PORT),
+                                                             500,
+                                                             QJsonDocument(req_obj).toJson(),
+                                                             out,
+                                                             QNetworkAccessManager::Operation::PostOperation,
+                                                             { {
+                                                               QSL(HTTP_HEADERS_CONTENT_TYPE).toLocal8Bit(),
+                                                               QSL("application/json").toLocal8Bit() } });
+
+  if (network_res.first == QNetworkReply::NetworkError::NoError) {
+    qDebugNN << LOGSEC_ADBLOCK
+             << "Query for cosmetic rules to server took "
+             << tmr.elapsed()
+             << " ms.";
+
+    QJsonObject out_obj = QJsonDocument::fromJson(out).object();
+
+    return out_obj["cosmetic"].toObject()["styles"].toString();
+  }
+  else {
+    throw NetworkException(network_res.first);
+  }
+}
+
 void AdBlockManager::restartServer() {
   if (m_serverProcess->state() == QProcess::ProcessState::Running) {
     m_serverProcess->kill();
diff --git a/src/librssguard/network-web/adblock/adblockmanager.h b/src/librssguard/network-web/adblock/adblockmanager.h
index 161fd8a41..b7859d4ef 100644
--- a/src/librssguard/network-web/adblock/adblockmanager.h
+++ b/src/librssguard/network-web/adblock/adblockmanager.h
@@ -59,6 +59,7 @@ class AdBlockManager : public QObject {
 
   private:
     BlockingResult askServerIfBlocked(const QString& url) const;
+    QString askServerForCosmeticRules(const QString& url) const;
 
     void restartServer();
 
diff --git a/src/librssguard/network-web/webpage.cpp b/src/librssguard/network-web/webpage.cpp
index 059695512..4202604b0 100644
--- a/src/librssguard/network-web/webpage.cpp
+++ b/src/librssguard/network-web/webpage.cpp
@@ -38,7 +38,7 @@ void WebPage::hideUnwantedElements() {
     auto js = qApp->web()->adBlock()->generateJsForElementHiding(css);
 
     runJavaScript(js);
-    qDebugNN << LOGSEC_JS << "Running domain-specific JS for element hiding rules.";
+    qDebugNN << LOGSEC_ADBLOCK << "Running domain-specific JS for element hiding rules.";
   }
 }