I saw PicLens a few months ago and thought- sweet plugin, too bad it is only for Safari. PicLens lets you view full screen slideshows of photos from several popular sites including Flickr and Facebook. I would switch to Safari, if only it had Mouse Gestures I for some reason decided to check it out again today and saw that they now have versions for Firefox and even Internet Exploder. For Firefox they have a cool 3D wall effect as seen above. For Safari you can browse using your Apple remote.