Very useful firefox addons

I frequently use the following firefox extensions:
1. PhZilla- to achieve anonymity in surfing using web-based proxy(called Ph proxy). GET IT HERE
2. IDM CC- extension to download files through Internet Download Manager. Very useful.. GET IT HERE
3. Skipscreen- skips unnecessary pages on sites like Rapidshare, Mediafire,
Megaupload,etc. IDM will then automatically download file as soon as you open link in new tab.  GET IT HERE
4. Google dictionary and Google translate- the in-line dictionary for any word you point to or double click; and the whole page translation of any webpage in any other language.  GET IT HERE
5. Adblock-Plus- very common and useful. Blocks ads and unwanted pages. If you don't have it, get it for sure.. GET IT HERE