Rated 3 out of 5 stars
Sort of works. I don't know if it's Firefox 3.5.5 or the addon, but flickr original keeps displaying in-line instead of starting a download. It should always trigger whatever_d_.jpg. eg: abcdefg1234567_o_d.jpg as the "_d" causes it to download rather than display inline.
I realize the add-on has separate view and download options, but I've double-checked and I'm hitting the right menu option (download). I've also tried disabling other extensions but it doesn't change anything.
this has been fixed in the latest version of the extension.