+ Fire Encrypter Fire Encrypter is an Firefox extension which gives you encryption/decryption and hashing functionalities right from your Firefox browser, mostly useful for developers or for education & fun.

Version 3.0 contains the following ciphers:

- AES (Rijndael 128Bit)
- Affine
- Caesar
- XOR
- OTP (One Time Pad)
- Vigenere
- Rail Fence
- Morse Encoder
- MD5 Hashing
- SHA1 Hashing
- SHA256 Hashing
- Secure password generator


Hackbar
This toolbar will help you in testing sql injections, XSS holes and site security. It is NOT a tool for executing standard exploits and it will NOT learn you how to hack a site. Its main purpose is to help a developer do security audits on his code. If you know what your doing, this toolbar will help you do it faster. If you want to learn to find security holes, you can also use this toolbar, but you will probably also need a book, and a lot of google
NF-Tools
This extension adds some of the functionality of the Tools to your right-click menu in Firefox. Just select some text on a webpage, right click on it and you can do the following actions on the text:
* ASCII <-> Hex
* ASCII <-> Binary
* Base64 encode/decode
* Javascript escape/unescape
* MD5 hash
* SHA1 hash

Руское сообщество Firefox