Which Firefox add-ons do you use?
hellotoby: Abduction - Screenshot Utility
https://addons.mozilla.org/en-US/firefox/addon/3408Adblock Plus
https://addons.mozilla.org/en-US/firefox/addon/1865ColorZilla - Color picker
https://addons.mozilla.org/en-US/firefox/addon/271Coral IE Tab - View IEs rendering engine in FF
https://addons.mozilla.org/en-US/firefox/addon/10909Delicious Bookmarks
https://addons.mozilla.org/en-US/firefox/addon/10909Firebug
https://addons.mozilla.org/en-US/firefox/addon/1843Firefox Throttle - Bandwidth Throttling
https://addons.mozilla.org/en-US/firefox/addon/5917Firequery - Jquery addon for Firebug
https://addons.mozilla.org/en-US/firefox/addon/12632HTML Validator - Validate without having to go to the w3c website
https://addons.mozilla.org/en-US/firefox/addon/249Live HTTP Headers
https://addons.mozilla.org/en-US/firefox/addon/3829Long URL Please - Replaces Short URLs with the original
https://addons.mozilla.org/en-US/firefox/addon/9549MeasureIt - Screen rulers
https://addons.mozilla.org/en-US/firefox/addon/539Web Developer Toolbar
https://addons.mozilla.org/en-US/firefox/addon/60YSlow - Yahoo page performance analyser
https://addons.mozilla.org/en-US/firefox/addon/5369