Interface Customizations

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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 (82)
13,163 users
Updated April 20, 2015

NiceReader

NiceReader is designed for web reading.You can customize font, color, background and size, etc, specify that interested you by selection tool. Can filiter the ad using high zIndex, iframe, mouse event, and clear the ad strings in text.

Rated 5 out of 5 stars (2)
197 users
Updated April 17, 2015

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 (143)
92,582 users
Updated April 16, 2015

Forecastfox (fix version)

Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.

Rated 5 out of 5 stars (109)
16,807 users
Updated April 14, 2015

Black background and white text No Restart

Makes black background and white text on every page

Rated 5 out of 5 stars (15)
4,023 users
Updated April 14, 2015

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 (37)
10,920 users
Updated April 13, 2015

Simple Locale Switcher

An easier management of the user interface language

Rated 5 out of 5 stars (5)
9,374 users
Updated April 10, 2015

FireTray

A system tray extension for Linux and Windows, allowing to set up custom icon, hiding to tray instead of closing, display the number of unread messages in mailing applications, and other features ...

Rated 4 out of 5 stars (219)
23,036 users
Updated April 9, 2015

Fierr

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

Rated 5 out of 5 stars (51)
3,404 users
Updated April 7, 2015

ToggleDocumentColors_

Adds a toolbar button and keyboard shortcut to switch between the default page colors and user-defined colors.
Firefox shortcut: Control-Shift-C
SeaMonkey shortcut: Control-K

Rated 4 out of 5 stars (13)
466 users
Updated April 7, 2015

Drag-Select Link Text No Restart

Select link text with easy drag gestures.

Rated 5 out of 5 stars (13)
505 users
Updated April 4, 2015

MonkeyFix

Fixes up numerous SeaMonkey browser interface issues (eg. adding support for popup ALT attributes), as well as adding some handy features for developers and power users (eg. configure source viewer, work online/offline).

Rated 5 out of 5 stars (3)
495 users
Updated April 1, 2015

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)
24,557 users
Updated March 17, 2015

JSONovich No Restart

Pretty-prints JSON content in the browser for easy, unobtrusive viewing.

Rated 4 out of 5 stars (30)
9,121 users
Updated March 13, 2015

SeaTab-X-2

Adds Firefox-style tab closers into SeaMonkey.

Rated 5 out of 5 stars (12)
1,090 users
Updated February 28, 2015

Stylish

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Orkut, and many, many other sites. You can even customize Firefox and other programs themselves.

Rated 4 out of 5 stars (732)
751,781 users
Updated February 27, 2015

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 (139)
41,778 users
Updated February 18, 2015

CuteButtons - Crystal SVG

add icons to buttons/menus/anywhere (CuteMenus - Crystal SVG not required)

Rated 4 out of 5 stars (84)
10,137 users
Updated February 6, 2015

True Full Screen in SeaMonkey No Restart

This extension enables true full screen mode in SeaMonkey for HTML5 video players, slide-shows, etc. and also for full screen invoked manually with the F11 key.

Rated 5 out of 5 stars (1)
137 users
Updated January 26, 2015

FlameFox 3 Rebrander

Rebrand SeaMonkey as Firefox 3 (by 2008WindowsVista and a11RyanC2)

Not yet rated
4 users
Updated January 23, 2015