use set_propagate instead of pack

src/Entity/Browser/Container/Tab/Page.php

@@ -52,11 +52,8 @@ class Page
             $this
         );
 
-        $this->gtk->pack_start(
-            $this->content->gtk,
-            true,
-            true,
-            0
+        $this->gtk->add(
+            $this->content->gtk
         );
 
         // Init statusbar

src/Entity/Browser/Container/Tab/Page/Content.php

@@ -31,6 +31,13 @@ class Content
             $this->_margin
         );
 
+        $this->gtk->set_propagate_natural_height(
+            true
+        );
+        $this->gtk->set_propagate_natural_width(
+            true
+        );
+
         $this->gtk->set_margin_end(
             $this->_margin
         );