Interface Customizations

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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 (21)
1,830 users
Added June 27, 2015

Open With Google Chrome

Open With Google Chrome sends pages from Mozilla Firefox to Google Chrome.

Rated 5 out of 5 stars (71)
10,540 users
Added June 23, 2015

Open With Opera

Open With Opera sends pages, links, tabs and images from Mozilla Firefox to Opera.

Rated 4 out of 5 stars (7)
1,346 users
Added June 9, 2015

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 5 out of 5 stars (8)
1,876 users
Added June 9, 2015

Page Colors & Fonts Buttons

Adds buttons to toggle the using the default page colors and fonts, and the page defined colors and fonts.

Rated 5 out of 5 stars (6)
1,963 users
Added June 7, 2015

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 (1)
312 users
Added June 4, 2015

Tab Numbers

Keeps track of your browser tab number.

Rated 5 out of 5 stars (5)
724 users
Added June 2, 2015

ImageBlock for seamonkey Requires Restart

Updated version of imageblock by Hemant Vats to work with seamonkey 2.29.
Provides a fast way to disable images in web pages that's usually set by the image manager sub-menu.

Not yet rated
19 users
Added May 25, 2015

Dorando keyconfig Requires Restart

A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)

As of version 2016.2, Custom keys (using custom JavaScript) work again!

Rated 5 out of 5 stars (31)
8,862 users
Added April 9, 2015

FlameFox 3 Rebrander Requires Restart

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

Not yet rated
1 user
Added January 23, 2015

New Tab Button 2 Requires Restart

Provides a new tab button for the navigation toolbar.

Not yet rated
11 users
Added January 22, 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)
216 users
Added December 30, 2014

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)
4,013 users
Added November 9, 2014

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 (188)
111,497 users
Added May 5, 2014

Shift+LeftClick XUL Requires Restart

This simple addon has only this functionality, nothing else: it opens links in a new active tab with Shift+LeftClick (left mouse button click).
Better use https://addons.mozilla.org/ru/firefox/addon/shiftleftclick-opens-links-in-/ for FireFox.

Not yet rated
9 users
Added April 12, 2014

Zing! Locale Switcher

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

Rated 5 out of 5 stars (2)
1,512 users
Added April 1, 2014

SeaTab-X-2 Requires Restart

Adds Firefox-style tab closers into SeaMonkey.

Rated 5 out of 5 stars (21)
2,059 users
Added February 17, 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)
12 users
Added January 29, 2014

Lightweight Themes Preview for SeaMonkey

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

Rated 1 out of 5 stars (1)
1 user
Added December 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)
656 users
Added November 28, 2013