Ranked:

#392 in Lifehacker, #1,860 in Browsers, #2,386 in Cyberculture, #2,492 in Firefox Add-Ons, #2,856 in Add-Ons, #3,875 in Geek, #4,979 in Extensions, #4,983 in GTD, #9,097 in Products, #13,398 in Tech