Add-ons

DownThemAll! by Nils Maier, Federico Parodi, others

The first and only download manager/accelerator built inside Firefox!

User Agent Switcher by chrispederick

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Element Hiding Helper for Adblock Plus by Felix Dahlke

Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.

UnMHT by arai_a

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Notepad (QuickFox) by InBasic, J Benthum

Everyday note-taking solution.

Google Privacy by Herrminator

Make some popular websites respect your privacy settings.
Please see the known issues below!

Open Multiple Locations by Jordan Matuszek

Adds a "File" menu option to open multiple locations at a time.

Restartless Restart by Erik Vold

This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.

ImageTweak: zoom/rotate images and videos! by Carlo Alberto Ferraris

A no-clutter image viewer for Firefox that allows you to zoom, rotate and display images/videos against a custom background. ImageTweak is a must-have addon for any photographer or photography-loving user.

Three winter cuties by Rallara

autumn the new spring by Osos Star