FireSteg is a steganography sidebar extension, letting you hide files inside images for covert sharing. In order to use FireSteg you have to install it and then right-click the toolbar to add the button.

The FireSteg addon is cross-platform and it works on Mac OS X, Windows and Linux.

Requirements:

· Firefox 1.5 or later.

What's New in This Release: [ read full changelog ]

· The biggest new feature is one requested by several users: password-based encryption for all files and filenames stored in images. SHA1+3DES are used in order to accomplish this; more details can be found by inspecting the source code.
· Revamped the user interface and added localization support for SEVEN new languages: German, Spanish, French, Japanese, Polish, Brazilian Portuguese, and Turkish.
· Numerous bug fixes were integrated, including (most glaringly) a bug that prevented users from extracting files from multiple images under certain non-trivial circumstances.