This is a custom list of usefull firefox extentions and addons that may help.
Extensions / Addons
https://addons.mozilla.org/extension...cation=firefoxFlashGot
Enables Extensive Download Manager Support
Download one link, selected links or all the links of a page at the maximum speed with a single click, using the most popular external download managers for Windows, Mac OS X, Linux and FreeBSD (dozens currently supported products, see
http://www.flashgot.net for details). FlashGot offers also a Build Gallery functionality which helps to synthetize full media galleries in one page, from serial contents previously scattered on several pages, for easy and fast "download all".
https://addons.mozilla.org/extension...cation=firefoxFasterFox
Allows Extensive Tweaking to Firefox (Not working for version 1.5.0.1)
Performance and network tweaks for Firefox.
Fasterfox allows you to tweak many network and rendering settings such as simultaneous connections, pipelining, cache, DNS cache, and initial paint delay.
Dynamic speed increases can be obtained with the unique prefetching mechanism, which recycles idle bandwidth by silently loading and caching all of the links on the page you are browsing.
A popup blocker for popups initiated by Flash plug-ins is also included.
https://addons.mozilla.org/extension...umpg=10&id=573Add N Edit Cookies
Allows you to view all cookies, and current ones in use and edit them with ease.
Cookie Editor that allows you add and edit "session" and saved cookies.
Now compatible with Deer PArk 1.5beta2. Fixed up "Delete Confirmation" dialog. Added Czech and Italian translation.
http://chrispederick.com/work/webdeveloper/Web Developer
This will allow you to edit a lot of web elements in real time, works great for cheating "hack-it" sites.
The Web Developer extension adds a menu and a toolbar to the browser with various web developer tools. It is designed for Firefox, Flock, MozillaSeamonkey, and will run on any platform that these browsers support including Windows, Mac OS X and Linux.
https://addons.mozilla.org/extension...mpg=10&id=1027All-In-One SideBar
One like Operas Sidebar
All-in-One Sidebar is a sidebar control, inspired by Opera's. It lets you quickly switch between sidebars, view dialog windows such as downloads, extensions, and more in the sidebar, or view source code or websites in the sidebar. It includes a slide-out button and a toolbar, all of which can be extensively customized.
All-In-One Sidebar provides also enhancements for many built-in and extension features and some extra features.
Post any others you guys use, and Ill add em to the list.