Mozilla Firefox's add-ons

Now that I am between jobs, and have some time on hand I thought, let’s maybe contribute or share or just throw something out there.
Let’s start off with some sites worth going to, some applications worth loading up to juice up the Internet experience.
Before all that, it’s worth mentioning that if you don't have Mozilla, it would be worth your while to install that first. It kind of makes you feel you are incharge, you know. I don't know how anyone could ever use IE. I have installed all these add-ons that it becomes hard for me to use the Internet any place else than my good ol' lappy. Add-ons worth installing, that save you time and make the interface nice and fancy are:

• Clipmarks
  
• Cooliris Previews
• Internote
• Mouse Gestures
• Permatabs
• Research Word
• Speed Dial
• Tab Effect

All these make Internet a better experience.
All these any hundreds more can be found here.
More as and when I find and install more. Let me know if you know of more interesting ones. If not, try one of those and you will thank me.