I have recently installed Rapportive extension on my Gmail account. The extension replaces the advertisements in right pane with the Rapportive app (shows you everything about your contacts right inside your inbox).
https://rapportive.com/
Open source coding is available http://code.rapportive.com/.
This app would be pretty smart if the Quickfile data could be shown in this type way.
Do you mean when browsing GMail to pull in the Quick File contact data? I will take a look at the extension as soon as I have some free time.
In all honesty it’s probably not a job we can take on in the near future but any developer could build a Chrome extension to do just with our API. Seems like it would be very useful!
Update on Rapportive - I have deleted the extension because it slowed down loading Gmail.