She is using Google Chrome, and as the following
Specifically it is the vertical scrollbar, that disappears on some pages.
Right-click the file and choose 'Open file location' to open the folder, which should be your Chrome How do I restore deleted Google Chrome bookmarks on an Android device? How do I sign out from Google Chrome so that all my saved passwords and. It allows users to store files in the cloud, share files, and edit documents, spreadsheets, and presentations with collaborators.
