I found a Firefox extension which used something like rudimentary steganography to hide code for their password stealing extension with over 100k installs. I wanted to show what real steganography looks like so I wrote this article. I am later going to write a deep dive article about the malware extension which will be published on the same blog! Article: https://www.yourdev.net/blog.php?post=steganography-hiding-d...

Working javascript LSB(Least significant bit) steganography: https://www.yourdev.net/stego/index.html