diff --git a/src/librssguard-standard/src/gui/standardfeedexpdetails.cpp b/src/librssguard-standard/src/gui/standardfeedexpdetails.cpp
index 2828530af..ee61c4283 100644
--- a/src/librssguard-standard/src/gui/standardfeedexpdetails.cpp
+++ b/src/librssguard-standard/src/gui/standardfeedexpdetails.cpp
@@ -22,4 +22,10 @@
 
 StandardFeedExpDetails::StandardFeedExpDetails(QWidget* parent) : QWidget(parent) {
   m_ui.setupUi(this);
+
+  m_ui.m_helpDontUseRawXml->setHelpText(tr("Turning this setting ON might bring considerable performance boost when "
+                                           "fetching this feed, but only in some very specific conditions.\n\n"
+                                           "This setting is useful when raw XML parsing of the feed is very slow, this "
+                                           "happens for feed which do have very long contents."),
+                                        false);
 }
diff --git a/src/librssguard-standard/src/gui/standardfeedexpdetails.ui b/src/librssguard-standard/src/gui/standardfeedexpdetails.ui
index 4b70ba55f..38e5fc57d 100644
--- a/src/librssguard-standard/src/gui/standardfeedexpdetails.ui
+++ b/src/librssguard-standard/src/gui/standardfeedexpdetails.ui
@@ -6,14 +6,17 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>360</width>
-    <height>197</height>
+    <width>561</width>
+    <height>357</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
   <layout class="QFormLayout" name="formLayout">
+   <item row="0" column="0">
+    <widget class="MultiFeedEditCheckBox" name="m_mcbDontUseRawXml"/>
+   </item>
    <item row="0" column="1">
     <widget class="QCheckBox" name="m_cbDontUseRawXml">
      <property name="text">
@@ -21,8 +24,8 @@
      </property>
     </widget>
    </item>
-   <item row="0" column="0">
-    <widget class="MultiFeedEditCheckBox" name="m_mcbDontUseRawXml"/>
+   <item row="1" column="0" colspan="2">
+    <widget class="HelpSpoiler" name="m_helpDontUseRawXml" native="true"/>
    </item>
   </layout>
  </widget>
@@ -32,6 +35,12 @@
    <extends>QCheckBox</extends>
    <header>multifeededitcheckbox.h</header>
   </customwidget>
+  <customwidget>
+   <class>HelpSpoiler</class>
+   <extends>QWidget</extends>
+   <header>helpspoiler.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/src/librssguard/definitions/definitions.h b/src/librssguard/definitions/definitions.h
index d4d209815..af212dc7c 100644
--- a/src/librssguard/definitions/definitions.h
+++ b/src/librssguard/definitions/definitions.h
@@ -195,9 +195,8 @@
   (qApp->web()->engineProfile()->httpUserAgent().toLocal8Bit() + QByteArrayLiteral(" ") + \
    QByteArrayLiteral(APP_USERAGENT))
 #else
-#define HTTP_COMPLETE_USERAGENT                                                                          \
-  (QByteArrayLiteral("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) " \
-                     "Chrome/122.0.0.0 Safari/537.36 ") +                                                \
+#define HTTP_COMPLETE_USERAGENT                                                                             \
+  (QByteArrayLiteral("Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0 ") + \
    QByteArrayLiteral(APP_USERAGENT))
 #endif