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Pimp your firefox
I have created a collection of firefox extentions that make general web site testing a lot easier and increase the usability of firefox.
The extensions are on my site:
http://www.nino.me.uk/downloads.php under the geeky/h4x section.
the extensions include
add_n_edit_cookies
quickjava
torbutton
download_statusbar
RefControl
urlparams
foxyproxy
showip
user-agent-switcher
hackbar
split_browser
video_downloadhelper
ietab
tab_mix_plus
web_developer
mouse_gestures
tamper_data
If you have any questions on the extensions just ask :D
Enjoy
The funniest addon there is must be "Mozilla Firesomething"