8 Firefox extensions you don't want to live without

I am not going to start a browser war here. I am just going to assume that the entire IT-savvy world is using Firefox. If you are not yet there, there is still hope. Please seek it at www.mozilla.com/en-US/firefox . * chuckle *
And if you are using Firefox, you will need to add on extensions. I used the word "need" because not loading Firefox with extensions is really not doing it justice. Extensions literally e-x-p-a-n-d the capability of this already-powerful browser.
Here, allow me to introduce 8 extensions that I am currently using. You risk your neck if you try to take any away from me. :P
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#1: All-in-One Gestures
Get this extension at either https://addons.mozilla.org/en-US/firefox/addon/12 or http://perso.orange.fr/marc.boullet/ext/extensions-en.html. This extension allows you to further exploit your mouse. There are some wonderful shortcuts that we can customize. (I will share more in a coming article... stay tuned!)
#2: Clear Private Data...
Get this extension at https://addons.mozilla.org/en-US/firefox/addon/1280. I like it because it helps to clean my browser with just 2 clicks. With it, I can clear my cache and cookies easily. Good for those who are paranoid about privacy. ^^
NOTE: A friend alerted me that this extension can be replaced by a simple shortcut - just do a ctrl-shift-del. Bingo. ^^
#3: CoLT
Get this extension at either https://addons.mozilla.org/en-US/firefox/addon/1812orhttp://www.borngeek.com/firefox/colt . CoLT adds two menu items to the browser's context menu that will show when you right-click on a hyperlink. If you need to copy regularly underlying link locations or link text, this is a very handy extension.
#4: Download Statusbar
Get this extension at http://downloadstatusbar.mozdev.org/. This extension replaces the default download window. Instead of viewing the status of your downloads by pressing ctrl-j, you can cut to the chase by monitoring the progress at your status bar. You also get several other useful options without needing to click elsewhere.
#5: Fasterfox
Get this extension at https://addons.mozilla.org/en-US/firefox/addon/1269or http://fasterfox.mozdev.org/. This extension provides performance and network tweaks for Firefox. If you are always complaining of slow surfing, you need to get this. Enable the "Turbo Charged" preset and you are all set to fly.
#6: Greasemonkey
Get this extension at either https://addons.mozilla.org/en-US/firefox/addon/748or http://www.greasespot.net/. It allows you to customize the way a webpage displays using small bits of JavaScript. There are many free scripts available at http://userscripts.org/ that need Greasemonkey to interface. (I will share more in a coming article... stay tuned!)
#7: IE Tab
Get this extension at either https://addons.mozilla.org/en-US/firefox/addon/1419or http://ietab.mozdev.org/ . I know I have said that Firefox beats other browsers hands-down. However, there remain some obstinate websites that need Microsoft Internet Explorer to work properly. This extension will then come in useful since you can get IE tabs within Firefox itself.
#8: Inline Google Definition
Get this extension at https://addons.mozilla.org/en-US/firefox/addon/2083. I simply love this extension. Just with a simple highlighting of the word and choosing the command in the context menu, I get the definition straight away in a very pretty popup window that can be resized and floated. It is the equivalent of typing "define:xxx" in google search.