Well, I habitually middle-clicked on a couch to view it in a new tab. (Bluetooth has been sketchy for me for ages. It finally pissed me off enough to plug in a third-party USB keyboard and mouse. This mouse has the standard assortment of buttons.) And I got a "no u cant save our pictuers!111!" alert that would. Not. Die. I had to quit Firefox to get it to go away.
What the hell, people?
So their feedback department got a love note from yours truly:
I'm running Firefox 1.5 on Mac OS X 10.3 (Panther), and I use a third-party USB mouse with a click wheel. I habitually middle-click website links to open them in new tabs. When I middle-clicked a couch on your website, I got an alert about not being permitted to save images from the site. As I will explain, middle and right click-trapping alerts are inherently irritating and useless, but this one was especially irksome because it would not go away. I had to quit Firefox to get it to stop.
Please consider removing this script. A much more practical way to protect your images would be to visibly watermark them so no one could pass them off as their own work. Thank you for your time.