Add CACHE Entry to allow ON/OFF with useflag
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f32e01..9e234b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,7 +20,7 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_BINARY_DIR})
 ################ OPTIONS ####################
 set(COMPILEUSB "no")
 set(AUTHORIZELINUXQSTYLES "yes")
-set(INTERNALBROWSER "yes")
+set(INTERNALBROWSER "yes" CACHE BOOL "Enable QtWebEngineWidgets support")
 set(DEBIANSPELLDIR "no")
 ################# INSTALL_DIR #####################
 if (UNIX AND NOT APPLE)