I just installed the Firefox plugin Piclens, as I am often looking at photos on Facebook and Flickr, and I must say that it is the best way to look at Pics! Totally cool and beats scrolling through web pages!
If you don’t like waiting for loads of webpages to load when scrolling through photos on a number of supported sites, then you really need to get this addon! (It works in many browsers, not just Firefox – including Safari and Internet Explorer.)
Supported sites include:
Picasa Web Albums
and there are more…
Check out the demonstration of how PicLens works on Youtube.