For what it's worth, I have a Linux system and there is a command called import. This is done from a terminal window, I type in import filename.jpg as a command, at that point the usual mouse arrow now appears as peculiar crosshairs. I then click on the web browser, which is just Firefox. The result is the creation of a jpeg called filename.jpg in the directory from which i called the import command. Perhaps other types of machine have such a screen capture available.
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import
command is part of theImageMagick
suite of image editing software. Basically it just performs a screen capture. On Windows the same effect can be achieved by hitting thePrtScn
key and pasting the result into an image editing software. - Willie Wong