Use the See-Also Sidebar
When browsing the web with DEVONagent try the See Also button (looks like the stovepipe hats that magicians use to conjure rabbits) on the right-hand side of the browser window's toolbar. It opens a sidebar that shows related documents from DEVONagent's own archive from open DEVONthink Pro (Office) databases, and from the web.
If the page is part of a currently open search run DEVONagent shows related pages from the search instead of from the archive. The web results are provided either by plugins or search engines such as Google.