Dreamweaver ver 4 Preview

Using DW to preview pages, Press F12 to launch Browser
Brave launches but either gives White Screen or the Brave icon in the bottom tool bar
To get out of this problem, I have to close Brave down using tool bar icon
Had to resort using another browser to continue my web work
OS:- win8 Pro

Now I find when I use Roboform, this opens Brave in a white window.
Ok if I use the Brave desktop icon and manually enter details
Doesnt seem to like being opened by third party software