Answer
Information from the existing Buzzen FAQ library.
Please make sure you have allowed popups from Buzzen on your browser. Also make sure you are not using any toolbars on your browser that blocks popups.
You can have profiles open in a new tab instead of a new window.
In Internet Explorer, click the Tools button, and then click Internet Options.Click the General tab, and then, under Tabs, click Settings.In the Tabbed Browsing Settings dialog box, click Always open pop-ups in new tab, and then click OK twice
In Firefox, click the Tools, and then click Options. Click tabs, and then, under Tabs, click open new window in new tab instead, and then click OK