FireGPG, a firefox extension for GPG
If you are a paranoid geek that likes to triple DES your shopping list (aren’t we all?) this is the firefox extension that you’ll like to install. FireGPG helps you encrypt and sign the text you write in your browser (even extends gmail to include some buttons like crypt and sign) using external tools like gnupg under GNU/Linux and MacOSX and gpg4win under Windows. One thing I don’t like about it is that I’ve noticed a CMD.exe windows launched when you execute the operations (and even more disturbingly it got launched in other occasions on almost random clicks). This made me panic whether I’ve caught some ad-ware but soon enough it was obvious it was the extension that was causing it. ...