Dropbox has a new feature it hopes will make getting work done from within its cloud storage product even easier. Called Extensions, these third-party software plug-ins will let you perform basic tasks you’d normally need to launch a separate app or in-browser window for all within Dropbox on the web.
https://www.theverge.com/2018/11/6/18068650/dropbox-extensions-web-file-editing-adobe-docusign-vimeo