Add shadow and modify blur

.config/picom/picom.conf

@@ -1,6 +1,8 @@
 inactive-opacity = .7;
 active-opacity = .725;
 
+shadow = true;
+
 opacity-rule = [
       "100:class_g = 'Gimp'",
       "100:class_g = 'Sxiv'",
@@ -8,6 +10,9 @@ opacity-rule = [
       "100:class_g = 'feh'",
       "100:class_g = 'Blender'",
       "100:class_g = 'org.remmina.Remmina'",
+      "100:class_g = 'LibreWolf'",
+      "100:class_g = 'xonotic-sdl'",
+      "60:class_g = 'qutebrowser'",
       "1:id = 0x1e00001",
       "100:class_g = 'VirtualBox Machine'"
 ];