save tab session to profile database on application quit

src/app/browser/main/tab.hpp

@@ -18,6 +18,9 @@ namespace app::browser::main
 
     class Tab : public Gtk::Notebook
     {
+        // Database
+        sqlite3 * db;
+
         // Actions
         Glib::RefPtr<Gio::SimpleAction> action__refresh,
                                         action__tab_close_active,
@@ -81,6 +84,8 @@ namespace app::browser::main
                     const int & PAGE_NUMBER
                 );
 
+            void shutdown();
+
             // Getters
             Glib::ustring get_page_title(
                 const int & PAGE_NUMBER