Comment 108 for bug 747197

As a temp solution you might be interested to try the Save Complete [1] extension. It supports saving images referenced in CSS files. We also discuss the problem in the « "File -> Save Page As" does not save images fro » [2] MozillaZine Forums topic.

Notes :
* [1] <https://addons.mozilla.org/en-US/firefox/addon/2925>
* [2] <http://forums.mozillazine.org/viewtopic.php?t=538458>