Extracting an image from a running Flash SWF file?

Is there a way to extract an raw image file from a SWF file that is already running in a browser?

I have had limited success by installing FlashFirebug (Firefox 14.0.1) and then doing the following:

use "Inspector" to select the Bitmap a tree hierarchy of objects
click on all extraneous objects and drag'n'drop them out of view
take a screen shot

Does anyone know a proper way to export the original image file?

How do I turn a SWF file into a picture?

Open the Animate document to export, or select the frame or image to export in the current document. Select File > Export > Export Movie or File > Export > Export Image. Enter a name for the output file. Select the file format and click Save.

First, save the swf file (you can find the url in your network tab). There are a few flash decompilers, for example http://www.sothink.com/product/flashdecompiler/

You can download a free trial