downthemall - mass rip
foxyproxy - if you run privoxy or something similar, useful to direct traffic through it or not based on url filters
foxytunes - media player control
text/plain - select unlinked addresses and right click for open in new tab/window
bugmenot - logins for free sites
adblock - duh
greasemonkey - duh
firebug - dev stuff
platypus - auto-generate some quick gm scripts
nightly tester tools - override compatability checks on some add-ons
remove cookie(s) for site - does that
web developer - dev stuff
foxyproxy - if you run privoxy or something similar, useful to direct traffic through it or not based on url filters
foxytunes - media player control
text/plain - select unlinked addresses and right click for open in new tab/window
bugmenot - logins for free sites
adblock - duh
greasemonkey - duh
firebug - dev stuff
platypus - auto-generate some quick gm scripts
nightly tester tools - override compatability checks on some add-ons
remove cookie(s) for site - does that
web developer - dev stuff