Add print function in selenoid for firefox.

tools/update_selenoid_browsers.py

@@ -221,6 +221,8 @@ def edit_browsers_json(browser_name, browser_version):
                     'port': '4444', 'path': '/wd/hub'}})
             (existing_data['firefox']['versions']).update(data_to_insert)
             updated_data = existing_data
+            print(updated_data)
+
     else:
         print("Browser version not matched")
         file_edited = False