How are you using Browser? In a web browser, launched, as a graphapp, or something else?
See the SSL section of this other topic:
I suspect what's happening is that your web browser is loading Neo4j Browser over HTTPS. You are then saying "make an unencrypted connection" and your web browser is blocking that, because the page (Neo4j browser) is secure, and attempting to make an insecure/unencrypted connection from within a secure page. This is what I'd look into. It's been a while since I saw this, but different browsers (Chrome & Firefox, etc) respond differently when you try to do this (make an unencrypted connection from an encrypted origin)