Extensions by Name

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Splash!

Adds a splash screen to most Mozilla and Mozilla Based products. Supports sound, opacity, CSS customization, custom images, and much more. You can add {appVersion}, {buildID} and {userAgent} to the loading text and it will be filled in for you.

Rated 4 out of 5 stars (104)
8,462 users

Splash! (Compatibility Update)

Adds a splash screen. Supported in Firefox, Flock, Thunderbird, Sunbird, eMusic Remote, Songbird and Sunbird.

Rated 3 out of 5 stars (17)
346 users

Splash! (Compatible version of Firefox 4)

Adds a splash screen. Supported in Firefox, Flock, Thunderbird, Sunbird, eMusic Remote, Songbird and Sunbird.

Rated 1 out of 5 stars (2)
19 users

Spoof Detector

Extension for Email Spoofing Detection

Rated 2 out of 5 stars (1)
65 users

SQLite Manager

Manage any SQLite database on your computer.

Rated 5 out of 5 stars (46)
215,148 users

Squared Australis Tabs (Tb) No Restart

A small and simple extension, which replaces the curved tabs of the Australis design with squared ones, similar to Thunderbird v14 and prior.

Rated 5 out of 5 stars (1)
374 users

SRB Lightning

An integrated calendar for Thunderbird build in purpose testing Serbian translation. You can download version: 1.0b2, 1.0b1 and 0.11 Inverse Edition which work with version 3.1, 3.0 and 2.0 Thunderbird. Windows, Linux and Mac are all supported.

Not yet rated
14 users

SS Ancestry Quick Button

A quick button link to the website, ssancestry.comyr.com/.

Not yet rated
42 users

Stacked Inspector

Switch DOM Inspector to an over/under vertical layout instead of the usual side-by-side panel layout.

Rated 5 out of 5 stars (9)
386 users

StartupMaster No Restart

Asks for the master password at startup (fixes multiple password prompt)

Rated 4 out of 5 stars (219)
20,529 users

Stationery

Extension to mimic Outlook Express Stationery.
Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!

Rated 4 out of 5 stars (108)
43,675 users

Status-Bar Custom Buttons

Create your own status-bar buttons.

Rated 4 out of 5 stars (9)
52 users

Statusus No Restart

Set your Facebook, Twitter etc. status by selecting a text on any page.

Not yet rated
4 users

Steganografi menggunakan PIT dan PRNG

Add-on penyisipan pesan pada gambar menggunakan PIT dan PRNG

Not yet rated
1 user

StickyCharset

Allows persistent charset changes on individual messages. For use with messages that have erroneous charset header...

Rated 3 out of 5 stars (1)
43 users

StockTicker

Shows your favorite stocks in a customizable...

Rated 3 out of 5 stars (80)
131 users

StormCows

Allows two-way access between Remember The Milk and calendar events or todo items.

Rated 4 out of 5 stars (10)
474 users

Stylish

Restyle the web with Stylish, a user styles manager. Stylish lets you easily install themes and skins for Google, Facebook, YouTube, Tumblr, and many, many other sites. You can even customize Firefox and other programs themselves.

Rated 4 out of 5 stars (809)
511,052 users

Stylish Tools

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)
1,481 users

Stylish-Custom

custom additions to Stylish extension

Rated 5 out of 5 stars (2)
429 users