One way to accomplish something similar is to use the Website Popup workflow in Automator.
- Open Automator
- Create a new Workflow or Service
- Add Get Specified URL's
- Add Website Popup
Modify the settings in each workflow to your preference. The popup can be then captured for screen shots.
From the Mac OS X Automation website:
More and more, services and functionality are moving to the Cloud. Accessing internet-hosted server-based content without
the hassle and overhead of using a browser can prove to be invaluable
in providing simple, quick, and elegant workflow soltuions.[sic] The
Website Popup action displays specified HTML or web-based content in a
floating HUD-like palette that can provide fast access to important
content and then quicly [sic] get out of the way.
Sample using "Website" in a Wikipedia search workflow: