Net-Force 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

http://www.net-force.nl/library/downloads/


DOM Inspector

Inspect the DOM of HTML, XUL, and XML pages, including the mail chrome.

https://addons.mozilla.org/en-US/firefox/addon/1806/