[ubuntu] Firefox right click menu doesn't show Save Image As.

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http://ubuntuforums.org – I've only just noticed this as I don't use it often. When I right click on an image in Firefox, as if to save the image, the option isn't there. As an example, with previous versions. I could do a Google image search and simply right click on any thumbnail and select Save Image as or View Image. These options are now no longer there. Any ideas? (Hardware)