Interface Customizations

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GNOMErunner Options Requires Restart

Allows to customize GNOMErunner theme

Not yet rated
850 users
Updated Nov. 18, 2017

Theme Font & Size Changer for TB

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.

Not yet rated
149 users
Updated Nov. 15, 2017

AMO Browsing for SeaMonkey

This extension makes browsing for extensions easier at addons.mozilla.org. It fixes incorrect information about some extensions being not available for SeaMonkey and adds links to the Add-on Converter where needed.

Rated 5 out of 5 stars (4)
135 users
Updated Nov. 4, 2017

Classic Password Editor Requires Restart

Adds the ability to create and edit entries in the password manager.

Not yet rated
481 users
Updated Oct. 31, 2017

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)
14 users
Updated Oct. 24, 2017

Password Tags Requires Restart

Adds metadata and sortable tags to the password manager.

Rated 5 out of 5 stars (13)
1,253 users
Updated Oct. 10, 2017

Classic Toolbar Buttons

'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.

Beta builds on versions page!

Rated 5 out of 5 stars (135)
28,613 users
Updated Sept. 13, 2017

GNotifier

Add-on for Thunderbird that replaces the built-in notifications with OS native ones. It supports most Linux Desktop Environments as well as Windows 8.1/10.

Rated 5 out of 5 stars (42)
10,289 users
Updated Sept. 8, 2017

Menu Wizard Requires Restart

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 (220)
116,100 users
Updated Sept. 3, 2017

Simple Locale Switcher Requires Restart

An easier management of the user interface language

Rated 5 out of 5 stars (12)
28,005 users
Updated Aug. 8, 2017

Add-ons Manager - Version Number

Restores version numbers for all installed add-ons inside Add-on Manager on Firefox, Thunderbird and Seamonkey.

Rated 5 out of 5 stars (24)
1,671 users
Updated Aug. 6, 2017

Active Stop Button Requires Restart

Stop gif animation with button, context menu or Esc key

Rated 4 out of 5 stars (41)
3,010 users
Updated July 26, 2017

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (7)
866 users
Updated July 16, 2017

CuteButtons

Adds icons to buttons and/or menus.

Rated 4 out of 5 stars (94)
5,127 users
Updated June 29, 2017

Right Links Requires Restart

This extension allows to open links in new tabs with right-click directly and using “long” left-click.
This is very useful for touchpads on notebooks and for mice without middle button.

Rated 5 out of 5 stars (141)
6,659 users
Updated May 17, 2017

Flexible Sidebar

Flexible Sidebar allows to change sidebar width by dragging the handles.

Not yet rated
25 users
Updated May 7, 2017

Restart Application Button

Restart Application Button lets you restart your Firefox and SeaMonkey application by a quick toolbar button click.

Rated 4 out of 5 stars (3)
812 users
Updated May 7, 2017

Tab Numbers

Keeps track of your browser tab number.

Rated 4 out of 5 stars (5)
589 users
Updated May 7, 2017

Speed Start

Speed Dial & Start Page with flexible layout for fast access to sites via visual bookmarks

Rated 5 out of 5 stars (69)
5,944 users
Updated March 15, 2017

QuickFolders (Tabbed Folders) Requires Restart

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 (118)
20,187 users
Updated March 2, 2017