Firefox Extension, simple tool that allows you to highlight all instances (within a webpage) of a word, several words, or a phrase that you currently have selected. Right click anywhere on the page and choose "Clear Highlighting" to reset the page.
provides a very easy way to lookup (or translate) a word in a Web page or an email in an online dictionary such as thefreedictionary.com. Simply select the word you want to lookup. Then right click and select "Dictionary Search for ...".
Tricks, tips and tools to help you get things done on the web. Lifehacker is full of application reviews, news and 'lifehacks' designed to help you be more productive in work and life.
rticle gives suggestions on how to set up your Mozilla application for extension development. Unless otherwise specified, those suggestions apply to both Firefox and Thunderbird as well as SeaMonkey version 2.0 and above.
a great list of keyboard shortcuts for the upcoming IE7. What makes it even greater, however, is that almost all of the shortcuts work identically in Firefox.