In anticipation of some changes to Firefox that are coming in 2014 and as part of a wider effort to improve the KeeFox add-on, KeeFox 1.3 will collect anonymous system statistics and optional anonymous usage statistics about the way that users interact with the add-on.
No private data will be collected at any time - things like the URLs you visit and the contents of your password database entries will never be collected. Since the data is anonymous, there will be no way for it to be linked back to you.
Examples of usage data include things like:
1) A menu item was clicked
2) A KeePass database containing 199 passwords was opened
3) An option was modified
Basic information about the system KeeFox is running on will be sent each time your browser starts but all usage statistics can be disabled if you prefer.
KeeFox 1.3 is currently available on the beta testing (development) channel so we hope that it will be able to pass through the usual Mozilla Firefox review process within a couple of months.