Many websites and social networking sites like Orkut have disable right click from photos and pictures, which restrict users to save photos from album galleries and from many other places, 
but you can still save all these blocked photos in firefox all you have to do is to install Bazzacuda Image Saver firefox Extension .
This extension will cycle through all open tabs. If a tab contains a single image (no HTML etc.), the image will be saved to disk and, optionally, the tab will be closed.
This is very useful if you view picture galleries and click on various thumbnails to load the full images into separate tabs.With one click you can save all the images, close the tabs they’re on, and continue viewing the gallery.
Each image will be stored in the base folder chosen in the options dialog.A tab is selected for automatic processing if its URL contains .jpg, .jpeg, .bmp, .png or .gif .
Other Important Feature of Image Saver are :
1. If the current tab has a standard HTML-type address which would normally be ignored by the extension, press Ctrl-Alt-L to save the LARGEST image on view and, optionally, close the tab.
2. You can specify a SUB-FOLDER of the BASE FOLDER by entering e.g.”~subname” in the address box before invoking the extension. Subname can be any name of your choosing and will be created if it doesn’t exist.
3. You can OVERRIDE the BASE FOLDER entirely by entering e.g. “~C:/photos” in the address box before invoking the extension.(Change the slash to a backslash. The editor used to create this description removes backslashes entirely)
4. Cleans up URLs such as php?imageid=12345.jpg by removing invalid filename characters.
5. If a tab’s URL appears to be for an image, but the page content also contains HTML, the LARGEST displayed image will be saved.
6. Existing files with the same name will not be overwritten. If the option to rename duplicate files is selected, the new file to be saved will be prefixed with “1 ” or “2 ” or “3 ” etc. until the extension finds a name that doesn’t exist. This thereby groups duplicate files together in a directory listing.
