FilesAnywhere is a secure online file storage service. For documents, spreadsheets and presentation files, FilesAnywhere makes it easy for its users to edit and save files, directly online. Right clicking on a file brings the below menu.
Choosing Service Plugins -> ZOHO Editor opens the file (document, spreadsheet or presentation) in a new tab.
You can edit the file and save it back to your FilesAnywhere account. Give FilesAnywhere a try.