Firefox is a great browser. Generally, it runs smoothly, very rarely crashes, loads pages quickly and has an incredible amount of add-ons available to it. Here are five add-ons which everybody should have, if you don't already.

Adblock Plus
Adblock Plus is absolutely fantastic. I've had it nearly as long as I've had Firefox. Basically, when you install adblock, it will come with a list of pre-defined known advertising websites and completely remove them from your browser. Things like those annoying flash adverts on youtube are automatically removed. Also, you can right click on images/left click the tab on flash media and add your own filter to block ads on certain websites. A definite must!