The Firefox add-on facilitates uploading of files from any website.
With its latest version, you can upload and download files from Box.net (which has a free space of 1GB), Flickr (used for photo viewing and sharing), Picasa (used for photo viewing and sharing), and Youtube (for uploading videos). This software makes it possible for you to upload videos on Youtube and manage your photos in an organized manner on Flickr, Picasa, and Box.net.
Moreover, the upcoming versions of this software will support other websites, such as Google Videos and Webshots. It's worth mentioning that Firefox Universal Uploader add-on is compatible with Mac OS X, Windows, and Linux.
In summary, this software simplifies the process of uploading files and managing your files across platforms. Its user-friendly interface and cross-platform compatibility make it an ideal choice for users regardless of their operating system.