Developer reply by Infocatcher
Rated 5 out of 5 stars
The addon is perfect but I love using keyboard shortcuts, I think you should be able to change the default one to one that you want.
This review is for a previous version of the add-on (0.1.6.1-signed).You can change keyboard shortcuts from about:config page, see notes for extensions.privateTab.key.* preferences:
https://github.com/Infocatcher/Private_Tab/blob/0.1.6/defaults/preferences/prefs.js#L9
To create your own collections, you must have a Mozilla Add-ons account.