Mozmill is Functional UI testing for Mozilla Applications.
You can install this with firefox as addon.

I have a one Xulrunner application. I want to integrate this
application with Mozmill extension.
I am able to install extension in my application but when i launch
this xul app i got below error in java script window.

Error: Permission denied to get property XPCComponents.utils
Source File: chrome://global/content/bindings/browser.xml
Line: 650

Can anybody help me how to fix this