Web Development Tools

Download and install Web Developer from https://addons.mozilla.org/en-US/firefox/addon/60. That will give you a toolbar of web development menus.

Another useful tool is Live HTTP Headers, which can be downloaded from http://livehttpheaders.mozdev.org/.

'FireFTP'- Handy FTP client addon: https://addons.mozilla.org/en-US/firefox/addon/684