Interface Customizations

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Custom Buttons Requires Restart

Gives a possibility to create custom toolbarbuttons...

Rated 4 out of 5 stars (124)
5,218 users

Fragment Titles

Save better history for fragment URLs.

Rated 5 out of 5 stars (3)
12 users

MonkeyFix Requires Restart

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)
153 users

TaQuilla Requires Restart

Automatic tagging using Bayesian statistics

Rated 4 out of 5 stars (13)
142 users

CuteMenus - Crystal SVG Requires Restart

Note from Mozilla: This add-on has been discontinued. Try Menu Icons Plus instead.

Adds icons to all menus along with some other features...

Rated 4 out of 5 stars (102)
407 users

FireTray Requires Restart

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 (266)
28,359 users

URLFilter

Block advertisement and access to adult sites

Rated 4 out of 5 stars (23)
1,009 users

Duplicate This Tab Requires Restart

This add-on provides the much needed feature update of Tab Duplication to Mozilla Browsers. Features Supported include Duplication of Browser Tabs, Detaching Tabs and Merging All Windows.

Rated 4 out of 5 stars (39)
3,053 users

Blue Essence Seamonkey Theme Requires Restart

Dark navigator theme based on a default Classical theme and now works on Linux :)

Rated 4 out of 5 stars (5)
0 users

Forecastfox Weather Requires Restart

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

Rated 4 out of 5 stars (932)
26,342 users

All Menus Button

Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.

Rated 4 out of 5 stars (13)
734 users

Password Mask Changer

Changes the mask character used in password fields.

Rated 5 out of 5 stars (4)
29 users

CloseTab Requires Restart

Lightweight add-on which adds to right-click menu 3 items allowing to close current tab, open a new one and reopen closed one. Right-click anywhere on site instead of using keyboard or finding buttons.

Rated 5 out of 5 stars (4)
155 users

Page Navigation Buttons

Adds a few buttons to help with page navigation, including Page Top, Page Bottom, Page Down and Page Up.

Rated 5 out of 5 stars (3)
136 users

printplus Requires Restart

PDF export support by Gecko.
https://github.com/hATrayflood/printplus

Rated 4 out of 5 stars (7)
462 users

Zing! Locale Switcher

Want to change from one language to another? Zing! and the locale is switched.

Rated 5 out of 5 stars (2)
158 users

NiceReader Requires Restart

NiceReader is designed for web reading. You can customize font, color, size, background, specify the elements to read, filiter ad elements, filiter ad strings, automaticaly turn page.

Rated 5 out of 5 stars (2)
151 users

RC Print Requires Restart

Adds a "Print" option to the Right-Click context menu.

Rated 5 out of 5 stars (2)
929 users

MonkeyMenu Requires Restart

MonkeyMenu brings some of the features of the MenuX Firefox extension to the Seamonkey browser. You can add about 29 buttons to the Seamonkey user interface, collapse any toolbar, add/remove search engines, have your font zoom size reloaded, and...

Rated 4 out of 5 stars (13)
0 users

Dark Background and Light Text (SeaMonkey)

Makes every page to have light text on dark background (exact colors are customizable)

Firefox version is here: https://addons.mozilla.org/firefox/addon/dark-background-light-text/

Rated 5 out of 5 stars (2)
52 users