Useful firefox extensions

Trying to make a list of useful firefox extensions for new converts/people interested. Here are a few - feel free to add some, suggest some, or write your own :smiley:

Adblock - - This one helps to improve load times and make pages flashing-banner free

Cookie Culler - - Cookie management, not much else to say

Disable Target - - Something that annoyed me with opera.

Foxytunes - - Very nice controls for media players