Add-ons

FlashGot Mass Downloader by Giorgio Maone

Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.

Torrent Tornado by Oleksandr

A Torrent Client for Firefox and SeaMonkey, runs everywhere, created in pure JavaScript without binary software!

Simple Locale Switcher by nohamelin

An easier management of the user interface language

Download Status Bar by Szalgiris

If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.

ReminderFox by Tom Mutdosch, Daniel Lee, others

ReminderFox displays and manages lists of reminders and tasks. ReminderFox uses easy-to-use lists with warnings/alarms to remind you of all your important appointments.
Synchronize ReminderFox with other calendars as well.

Toolbar Buttons by Button Guy

Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.

Restart by Schuzak

"Restart" menu and button, with configurable shortcut key.

No Resource URI Leak by Desktopd Collaboration, nord-stream

Deny resource:// access to Web content: We fill the hole to defend against fingerprinting. Very important to Firefox privacy. A direct workaround for bugzil.la/863246

URL Fixer by eyeo GmbH

URL Fixer fixes common typos in URLs entered in the address bar. It will fix errors like "google.con" or "youtube,com". You have the option of being asked to confirm corrections before they are applied.

Page Colors & Fonts Buttons by Button Guy

Adds buttons to toggle the using the default page colors and fonts, and the page defined colors and fonts.

FfChrome by Shivanand Sharma

FfChrome is a nifty little addon that slims and trims your context menu on the fly for simplicity, ease of use, easy access and eliminates the clutter. One addon that makes your day-to-day life easier by increasing productivity.

Fierr by RealityRipple

Replaces the error page with a more stylish appearance with additional features.

Spring Green by MaDonna by MaDonna

purple beautiful by OlgaBelaya

Тhe blossoming begins by rositza