[JKT]

Set your start page to be Empty:



Edit: I misunderstood what you want. You want Google to always be your start page, but have new tabs be blank, is that correct?

If so, still do what I suggested above - set the start page to Empty. Then, close all tabs bar one and open Google.com or whatever. Take a snapshot of your Workspace.

Now, whenever you launch OmniWeb in that Workspace, Google will load as the first page. Subsequent new tabs will be blank.

HTH.