Top-Rated Extensions


QuickFolders (Tabbed Folders)

The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.

See new mail at a glance after automatic filtering - supports quickFilters addon!

Rated 5 out of 5 stars (109)
24.424 users

Theme Font & Size Changer No Restart

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Rated 5 out of 5 stars (153)
94.870 users

Classic Toolbar Buttons No Restart

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.

Beta builds on versions page!

Rated 5 out of 5 stars (144)
39.995 users


Word translation in tooltip with English⟷Croatian dictionary already incorporated.

Rated 5 out of 5 stars (59)
5.041 users

Menu Konteks untuk Pengelola Pengaya

Menambahkan lebih banyak menuitem pada menu konteks di Pengelola Pengaya.

Rated 5 out of 5 stars (32)
14.947 users

Copy Plain Text 2

Copies text without formatting

Rated 5 out of 5 stars (63)
46.120 users


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

Rated 5 out of 5 stars (39)
16.233 users


Persistent sticky notes for Thunderbird associated to mails.
This is a port to Thunderbird >= 3 and Seamonkey >= 2 based on XNote 2.1.0 ( ) with bugfixes and additional features.

Rated 5 out of 5 stars (64)
18.686 users

NewScrollbars (aka NoiaScrollbars)

The "NewScrollbars"-extension replaces default scrollbars of Firefox and Thunderbird with colorized ones (partly) known from "Noia themes".

Rated 5 out of 5 stars (98)
15.429 users

GNotifier No Restart

Add-on for Firefox and Thunderbird. Integrates Firefox's notifications with the OS's native notification system. It supports most Linux desktops and Windows 8.

Rated 5 out of 5 stars (46)
11.490 users


Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).

Rated 5 out of 5 stars (251)
42.624 users

Menu Wizard

Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (134)
23.978 users

Adblock Plus No Restart Unggulan

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4.987)
21.495.031 users

FlashGot Mass Downloader

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.

Rated 5 out of 5 stars (504)
932.807 users

Extension Auto-Installer No Restart

Extension Auto-Installer is a helper for Firefox/SeaMonkey/Thunderbird extension developers: it allows automatically adding or updating browser extensions, e.g. via command line tools. This makes testing your changes easier.

Rated 5 out of 5 stars (15)
3.716 users


Hide title bar if window is maximized.

This extension created only for GNOME 3. It can create problems with another DE (KDE, XFCE, etc). However, you can use HTitle at your own risk (need enable "legacy" mode on settings page).

Rated 5 out of 5 stars (96)
9.283 users


CantoFish is a popup Cantonese-English dictionary for Firefox. It contains over 200,000 entries and works with both traditional and simplified Chinese characters. The Yale and Jyutping romanization systems are supported, as well as Mandarin pinyin.

Rated 5 out of 5 stars (23)
660 users

Add-ons Manager - Version Number No Restart

Restores add-on version number inside Add-on Manager for latest builds of Firefox, Thunderbird and Seamonkey.

Rated 5 out of 5 stars (14)
898 users

Search Results Sort By Date Not Relevance

Makes search results sort by "date" instead of "relevance" by default.

Rated 5 out of 5 stars (14)
2.772 users

uBlock Origin No Restart

Finally, an efficient blocker. Easy on CPU and memory.

Rated 5 out of 5 stars (310)
559.438 users