Since then, Google have announced support in Chrome as well, and there are rumours around that Mozilla plans on adding it to firefox. Now since the specification is still a draft, none of these browsers use the
window.performanceobject, but instead use their own browser specific version. I've now added support for all these versions into boomerang.
More details in my post on the YDN blog.
You can get boomerang from github, and join the discussion on our forum.