Interface Customizations


SeaTab-X-2 Requires Restart

Adds Firefox-style tab closers into SeaMonkey.

Rated 5 out of 5 stars (21)
1,793 users
Updated Feb. 28, 2015

True Full Screen in SeaMonkey

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 (17)
3,117 users
Updated Jan. 26, 2015

FlameFox 3 Rebrander Requires Restart

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

Not yet rated
1 user
Updated Jan. 23, 2015

New Tab Button 2 Requires Restart

Provides a new tab button for the navigation toolbar.

Not yet rated
8 users
Updated Jan. 22, 2015

Sort and Search Customization Dialogs Requires Restart

Sort and search for buttons in (any) toolbar customization dialog

Rated 5 out of 5 stars (17)
440 users
Updated Jan. 14, 2015

FAYT Revived Requires Restart

Regain possesion of your good "Find As You Type" search bar in Firefox and SeaMonkey!

Rated 4 out of 5 stars (4)
147 users
Updated Jan. 6, 2015

HTML5 Loop Requires Restart

Loop HTML5 Video and Music.

Rated 2 out of 5 stars (16)
324 users
Updated Nov. 17, 2014

Old Default Image Style

Restores the default image style used for top-level images in previous versions of Firefox.

Rated 5 out of 5 stars (92)
4,241 users
Updated Nov. 13, 2014

Stylish Tools Requires Restart

Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey

Rated 4 out of 5 stars (3)
771 users
Updated April 28, 2014

Add Search Engines for SeaMonkey Requires Restart

Add missing search-engine detection to SeaMonkey

Rated 4 out of 5 stars (1)
3 users
Updated April 24, 2014

Stylish Sync

Sync engine for Stylish with backup / restore facility.

Rated 5 out of 5 stars (31)
2,252 users
Updated March 23, 2014

Search Engine Quick Switcher

Switch the current search engine on the fly! Press Control + Shift + Down Arrow to switch to the next search engine or Control + Shift + Up Arrow to select the previous one.

Rated 3 out of 5 stars (2)
7 users
Updated Feb. 2, 2014

Lightweight Themes Manager

Manage your installed personas (lightweight themes).

Rated 4 out of 5 stars (13)
5,448 users
Updated Jan. 20, 2014

F.B. Purity - Cleans Up Facebook

F.B. Purity hides the ads, app spam and other annoying clutter from your facebook news feed, lets you increase the font size, change colours plus many more features and generally makes Facebook a lot less annoying to use.

Rated 5 out of 5 stars (109)
14,783 users
Updated Dec. 24, 2013

Lightweight Themes Preview for SeaMonkey

Preview lightweight theme when hover on menuitems in Apply Theme menu.

Rated 1 out of 5 stars (1)
4 users
Updated Dec. 4, 2013

Duplicate Tab Blocker

Prevent duplicate tabs. Allow only one tab for a url. If you click a link that is already opened in a tab, then existing tab would be focused instead of opening a new tab. This works even across firefox windows.

Rated 3 out of 5 stars (11)
309 users
Updated Dec. 1, 2013


Dynamic creation of bookmark-style toolbar buttons which you can customize.

Rated 5 out of 5 stars (12)
61 users
Updated Oct. 19, 2013

TaQuilla Requires Restart

Automatic tagging using Bayesian statistics

Rated 4 out of 5 stars (13)
179 users
Updated Oct. 14, 2013

ThreadKey Requires Restart

Strike the 'T' key to sort messages by thread, strike the 'U' key to sort them unthreaded again, just like the 'G' key switches to Grouped By Sort view

Rated 4 out of 5 stars (23)
1,612 users
Updated Sept. 20, 2013

jQuery Requires Restart

jQuery and jQuery UI embedded in browser

Rated 4 out of 5 stars (7)
1,619 users
Updated Aug. 31, 2013