Right-click on items in download window
 

It would be most useful if Omniweb were to allow one to right-click on items in the download manager to open up a contextual menu. One item that could be included in such a menu should be "Open with...," so as to allow one to use, say, Preview instead of Acrobat to open up a PDF file. As it is, in order to obtain that functionality, one must highlight the target item in the download manager, click "Revel in Finder," right-click, and then choose "Open with..." from the contextual menu.

FWIW, you can click the proxy icon for the download in the Download Manager window and drag and drop it to an application's icon to open it. You can also double click the proxy icon to open the file in the default app for that file type.