Extensions by Name

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Smiley Fixer Requires Restart

Fixes Wingding Smileys in Outlook-generated emails

Rated 5 out of 5 stars (19)
4,869 users

Snic

Smart Near-Infrared Control.

Not yet rated
0 users

Soapy Requires Restart

Bypasses DNS-based censorship

NOTE: This was created as a SOPA protest in 2012. This does not work anymore for most sites. Use Tor instead.

Not yet rated
9 users

SolusVM VPS Monitor Requires Restart

Status Monitor for SolusVM-backed VPS.

Not yet rated
12 users

Sort and Search Customization Dialogs Requires Restart

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

Rated 5 out of 5 stars (17)
405 users

SourceEditor Requires Restart

View and Edit source of HTML element...

Rated 4 out of 5 stars (20)
650 users

South African English spell checker Requires Restart

The South African English spell checker allows you to use place names, borrowed words, and other expressions that are unique to South Africa.

"No more eina, just a lekker spell checker!"

Rated 5 out of 5 stars (3)
1,229 users

Spanish (Spain) ChatZilla Requires Restart

Spanish (es-ES) Language Pack for ChatZilla

Rated 5 out of 5 stars (7)
587 users

Speed Dial Requires Restart

Direct access to your most visited websites

Rated 4 out of 5 stars (1,524)
134,173 users

Speed Start

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

Rated 5 out of 5 stars (79)
3,576 users

SQL Cardfile Requires Restart

A simple card file database using SQLite as the backend.

Not yet rated
12 users

SQLite Manager Requires Restart

Manage any SQLite database on your computer.

Rated 4 out of 5 stars (347)
100,505 users

Standalone SeaMonkey Mail

Use SeaMonkey as a standalone e-mail client. Set up a default browser for links opened from Mail & Newsgroups.

Rated 5 out of 5 stars (5)
145 users

Stop Tube HTML5

Stops autoplay of YouTube HTML5 videos (WebM). It is Flash-Block equivalent for HTML5 videos.

Rated 3 out of 5 stars (65)
1,376 users

Stop Watch timer (Sea Monkey) Compatible with Firefox 57+

Stop Watch timer for Sea Monkey

Not yet rated
3 users

Stylish Sync

Sync engine for Stylish with backup / restore facility.

Rated 5 out of 5 stars (31)
1,735 users

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)
642 users

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 4 out of 5 stars (10)
1,036 users

Subasa Tamil to Sinhala Transliteration Requires Restart

Tamil To Sinhalese Transliteration provide by Subasa Language Service

Rated 4 out of 5 stars (1)
35 users

Sun Cult Requires Restart

Worldwide Sunrise, Sunset, Twilight, Moonrise and Moonset...

Rated 5 out of 5 stars (107)
2,306 users