"In short, Jetpack is an API for allowing you to write Firefox add-ons using the web technologies you already know." html, css & javascript

The Canvas 3D project aims to add support for low-level hardware accelerated (where possible) 3D rendering via the HTML canvas element.

allows you to test the lastest nightly version of firefox (3!) as a portable version, so you don't mess up with you "normal" firefox !

"This extension allows Sunbird and Lightning to read and write events to a Google Calendar." FINALLY !

to be supported by firefox3

"Users will see their friends' faces, and by clicking on them will be able to get a list of that person's recently added Flickr photos, favourite YouTube videos, tagged websites, composed blog posts, updated Facebook status, etc."

j'ai quand même libéré plus d'un giga avec ça ;)

the microformat extension

semantic web : one step further... after rss and tags, microformat is the new black ;)

The bird gazed down upon the unbelievers and cast fire
and thunder upon them. For the beast had been
reborn with its strength renewed, and the
followers of Mammon cowered in horror.

isn't that a mixed rip-off of Forefox & Thunderbird logo ?