https://www.theverge.com/2018/11/6/18068650/dropbox-extensions-web-file-editing-adobe-docusign-vimeo

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.

Dropbox’s first suite of Extensions — with partners like Adobe, DocuSign, and Vimeo — will let you get the required digital signatures on a PDF and perform some light photo editing and annotating of videos, all without leaving Dropbox and in a workflow that immediately saves new files to the cloud. Extensions launches for all users, including standard non-business users of Dropbox, on November 27th.