diff --git a/configuration/config.ini b/configuration/config.ini
index 5521500..9db5db2 100644
--- a/configuration/config.ini
+++ b/configuration/config.ini
@@ -1,7 +1,7 @@
 [browser]
-browser = chrome
+browser = firefox
 
-mode = normal
+mode = headless
 
 
 [application]
diff --git a/data_provider/DataProvider.xlsx b/data_provider/DataProvider.xlsx
index aacd16b..2e7bbb7 100644
Binary files a/data_provider/DataProvider.xlsx and b/data_provider/DataProvider.xlsx differ
diff --git a/data_provider/~$DataProvider.xlsx b/data_provider/~$DataProvider.xlsx
deleted file mode 100644
index e69de29..0000000