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diff --git a/indra/newview/llfloaterhowto.cpp b/indra/newview/llfloaterhowto.cpp
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+++ b/indra/newview/llfloaterhowto.cpp
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+/** 
+ * @file llfloaterhowto.cpp
+ * @brief A variant of web floater meant to open guidebook
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llfloaterhowto.h"
+
+#include "llfloaterreg.h"
+#include "llviewercontrol.h"
+#include "llweb.h"
+
+
+const S32 STACK_WIDTH = 300;
+const S32 STACK_HEIGHT = 505; // content will be 500
+
+LLFloaterHowTo::LLFloaterHowTo(const Params& key) :
+    LLFloaterWebContent(key)
+{
+    mShowPageTitle = false;
+}
+
+BOOL LLFloaterHowTo::postBuild()
+{
+    LLFloaterWebContent::postBuild();
+
+    return TRUE;
+}
+
+void LLFloaterHowTo::onOpen(const LLSD& key)
+{
+    LLFloaterWebContent::Params p(key);
+    if (!p.url.isProvided() || p.url.getValue().empty())
+    {
+        std::string url = gSavedSettings.getString("GuidebookURL");
+        p.url = LLWeb::expandURLSubstitutions(url, LLSD());
+    }
+    p.show_chrome = false;
+
+    LLFloaterWebContent::onOpen(p);
+
+    if (p.preferred_media_size().isEmpty())
+    {
+        // Elements from LLFloaterWebContent did not pick up restored size (save_rect) of LLFloaterHowTo
+        // set the stack size and position (alternative to preferred_media_size)
+        LLLayoutStack *stack = getChild<LLLayoutStack>("stack1");
+        LLRect stack_rect = stack->getRect();
+        stack->reshape(STACK_WIDTH, STACK_HEIGHT);
+        stack->setOrigin(stack_rect.mLeft, stack_rect.mTop - STACK_HEIGHT);
+        stack->updateLayout();
+    }
+}
+
+LLFloaterHowTo* LLFloaterHowTo::getInstance()
+{
+    return LLFloaterReg::getTypedInstance<LLFloaterHowTo>("guidebook");
+}
+
+BOOL LLFloaterHowTo::handleKeyHere(KEY key, MASK mask)
+{
+	BOOL handled = FALSE;
+
+	if (KEY_F1 == key )
+	{
+		closeFloater();
+		handled = TRUE;
+	}
+
+	return handled;
+}