Firebug, FlashGot, Xmarks Sync

"Until the sites in question fix this long-standing security hole, here’s a few things you can do to help prevent less scrupulous types from ‘sidejacking’ your accounts:"

"Zotero [zoh-TAIR-oh] is a free, easy-to-use Firefox extension to help you collect, manage, and cite your research sources."

"After the Deadline is a smart, contextual grammar, style, and spell checker." The documentation can be found here: http://firefox.afterthedeadline.com/proofreading-for-firefox-documentation/