Five useful tools for browsing with Firefox.

Tamper Data

A tool used to interfere with data being sent from one website to another through your browser.

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters.
Trace and time http response/requests.

Security test web applications by modifying POST parameters.

FYI current version of Google Web Accelerator is incompatible with the tampering function of TamperData. Your browser will crash

Download Helper

A tool used to capture media, namely videos, from the web, and download them to your computer.Using DownloadHelper, you can easily save videos from most of the popular video sites. Note that DownloadHelper does not break any real protection implemented on the sites. It just give an easier access to clear content that will be downloaded by your browser anyway. Unless exceptions, downloaded videos must be kept on your disk for personal use and not shown on other Web sites.
Session Fix

A tool that makes it when you close your browser you have the option to save session, so you wont have to remember what you were doing.

Session Fix extends the warning dialog on quitting with a button, that lets you save the . session only for this time

You like the session restore feature of Firefox 2, but always restore your previous

session isn't what you like to do? This extension may be the answer. It extends the

warning dialog on quitting with a button, that lets you save the session only for this

time.

Linkification

A tool that makes all non hyperlink web addresses clickable on any given web page.

Converts text links into genuine, clickable links.

To view and set options, you can

(1) use the Linkification right-click context menu

(2) right-click the status bar icon and click "Options&quot

(3) click Tools- >Extensions, and double-click the Linkification item.

Foxy Tunes

A tool that syncs your browser with your media player, letting you browse a listen to music at the same time with ease.

FoxyTunes Planet is a personalized music aggregator. The website aggregates music videos, photos, news, bios and much more from the best music sites all over the Web into one convenient place.