For years, many photo collectors have added photos from the internet
to their collections. Often you see photos you just have to have.
Others show subjects you would never have the opportunity to shoot
yourself.

Many collectors have discovered that if you use the Opera web browser,
www.opera.com, rather than saving individually each photo you might
want to keep, a very time consuming process, you can regularly view
again photos you have seen by extracting photos from the browser
cache, a form of internet scavenging.

Opera made this easy to do. User browser caches can contain thousands
of files. When Opera stored a photo in browser cache, it stored the
file extension with it, such as filename.jpg. Thus you could use
Windows Explorer or other file management programs to identify and
copy just .jpg, gif, or .png files from the cache to a work directory,
where you could also easily eliminate small icon files not worth
looking at.