Best Firefox Extensions.

asininity

What are your favourites and why?

My personal ones are:

AdBlock Plus (for blocking annoying ads)
Foxmarks (For synchronising your bookmarks across many computers)
ChatZilla (Intergrated IRC client)
ErrorZilla (Find out the problem if a page doesn't load)
Ghostery (Find out whos watch what you're doing)
WOT or Web of Trust (See if the site you're visiting is ok)

Aiadi

Definitely Foxmarks (can't live without it).
Also love CoolPreviews, FoxTabs, Removetabs and DownloadStatusbar as they make browsing much easier.

PDF Downloads to print any webpage into PDF and 'Add to Search Bar' to add any sort of search forefox's searchbar (like say no to 0870 search).

The main reasons I love FireFox...

Oh and of course FEBE to allow me to back my 30+ extensions up.

savemoney

No script ( a security must)
Roboform (needs firefox plug in)
Wot
Downloadthemall!
British dictionary

aliEnRIK

Noscript (As savemoney says ~ a security MUST)
Downemall (pretty neat freebie bulk downloading utility)
Google toolber (So I can get my bookmarks on any machine)
Cooliris (cool photo viewer for facebook, google images etc)

I used to have loads, but dont now as they can create probelms

Reggie_Rebel

Colourful Tabs - adds little but looks nice
Foxy Tunes

mr_jetlag

Adblock Plus is essential.
Noscript less so if you already have ABP and have FF 3.0
Gmail manager if you have multiple Gmail accounts.
Scrapbook - I like to save offline web pages without having to bookmark them, this works great if you are always on the move.

isofa

My essentials (all available from the Add ons search)

NoScript
PDF Download
AdBlock Plus
FlashBlock
Download Helper
CopyPlainText
IE Tab for those rare occasions...

jasonwatkins

ah well, that's another reason for people to hate me because i don't use anti-virus software - i don't use noscript either

for me, it's ..

adblock plus
foxytunes - a definite must
customize google - love this, takes away all the blurb
autoshutdown - useful for shutting down when directly downloading big files
twitterfox
freecorder toolbar

esuhl

NoScript is the single, most useful add-on ever, and Adblock Plus comes a close second.

Other than those, Fetch Text URL allows you to open a plain text URL via the context menu, and while most of the features in Tab Mix Plus have gradually been included in the main Firefox application, there are a few tweaks (putting tabs on multiple lines, changing the formatting of active/inactive/pointed-to tabs, etc.)

For basic macro scripting, iMacros is quite handy too.

DatabaseError

adblock plus
adblock plus element hider
british dictionary
dt whois
fission (progress bar)
foxmarks
greasemonkey
ie tab
image zoom
magic video downloader
noscript
refcontrol
sxipper
tabmixplus

alanjuk

The one I like is febe to back all my extensions up with.