To my surprise I noticed that it isn't possible to embed shared files anymore by using the ?raw=1 parameters as discussed in the Dropbox Help Center.
For instance, I am not able to see the following file anymore in Chrome 56.0.2924.87 or 57.0.2987.98:
https://www.dropbox.com/s/qgauf66zeoi816i/___TEST___.pdf?raw=1
The Errors that are being thrown by Chrome:
- Unrecognized Content-Security-Policy directive 'referrer'.
- Failed to load 'https://dl.dropboxusercontent.com/content_link/..../file' as a plugin, because the frame into which the plugin is loading is sandboxed.
The issues currently doesn't seem to affect any other browsers like IE, Edge or FF.
Update: Safari 10.0.3 (Mac Sierra) also seems to be affected
Are you are aware of this issue? And will it be solved?