I had this same bar display the first time I loaded the browser. Since, like you, I wanted to do neither, I just clicked the cross and closed the notification. Since starting the browser again, the message has not re-appeared.
Out of interest, how many times have you started the browser up? As chuck says, this is a Beta release. There are likely to be many incompatibilities with current tools and add-ons that might be causing this message to display.