Mozilla Firefox Extensions

These are some of the Firefox extensions I use myself:

Adblock http://adblock.mozdev.org/
Lets you filter out any particular images or sites from showing up in your browser.

Flashblock http://flashblock.mozdev.org
Requires you to click on any flash related object for it to initialize.

Forecastfox http://forecastfox.mozdev.org
Places local weather into your browser toolbar.

The current Firefox release version is 1.5. I've been using the 2nd Deer Park Alpha for about a month now. The only gripe is that the close tab button got moved on the tab, so it's harder to close many tabs quickly. Hopefully an option will let you change this in a later release version. Funny, because this is a feature that is implemented by many tab-related extensions, but now part of the default features --while I'm used to the now alternative way.