I never even heard of Superbird Browser? There is very little information about the Browser, and you would expect that they know that people would want more in depth information on the Browser? The button "Home" just loads the same page again...no contact information about the company / people behind the browser? The about us page has a video place holder but no video...and claiming to be save against the NSA/Prism? Uhmm are they really thinking they can...if the NSA wants our information they will get it and we will never know they have done so.
A lot of plugins...i was not impressed what i saw on their site. Improved privacy...what is improved...what has been done to ensure that? I am sorry to be so negative this time, but i am not going to try that Browser. I know that was not what you asked or implied...but for all the reasons mentioned my gut feeling tells me to not trust that site!