The most innovative add-on I've seen in a long time.

The ability to isolate tabs to containers and use multiple accounts from the same domain in the same browser is really useful.

Also, the privacy factor, stopping FB, Google, and Advertisers from tracking you across the web because the cookies etc. are isolated to each container is simply awesome.

However, for some reason I am unable to save articles to Instapaper using the Instapaper add-on, if someone could let me know how to overcome this issue that would be great. :-)