title: save an image with selenium & firefox
body: <p>i'm trying to save an image from a website using selenium server &amp; python client.
  i know the image's URL, but i can't find the code to save it, either when it's the the document itself, or when it's embedded in  the current browser session.</p>
  
  <p>the workaround i found so far is to save the page's screenshot (there are 2 selenium methods for doing just that), but i want the original image.</p>
  
  <p>i don't mind fiddling with the clicking menu options etc. but i couldn't found how.</p>
  
  <p>thanks</p>