Flickr Photos In New Tab от mendhak

Replaces the New Tab in Firefox, and displays an image from a Flickr album of your choice, or Flickr Explore or a text search.

You can change the Photoset ID, text search, Flickr Explore, and pick a photo size in Add-ons > Flickr Photos In New Tab > Preferences.

When choosing photos for your album, try to make sure they are in landscape orientation; portrait photos will get filtered out. Also, ensure that the photos have at least a Large 2048 size.

It defaults to my Flickr album, you can leave it at default it if you like it!