Now that Mozilla's locked down Firefox 3's feature set, it's clear the new browser iteration will render some extensions obsolete. Firefox 3 will include functionality out-of-the-box that you could only get with add-ons before. Let's take a look at five extensions you might not need when you switch to Firefox 3.

NoSquint
Google Gears
Resize Search Box
DownThemAll
Better Gmail & Other Mailto: handler add-ons