Extensions by Name

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SortPref Requires Restart

Adds the ability to control primary, default sorting and threading options.

Rated 4 out of 5 stars (11)
1,716 users

SortRecipients Requires Restart

SortRecipients lets you alphabetically sort the recipients lists (To/Cc) when composing a message, simply by clicking the Sort button, which it adds to the Compose window toolbar.

Rated 4 out of 5 stars (5)
370 users

SoundPlus Requires Restart

SoundPlus customizes the sound that is played when a new message arrives for a particular contact in the address book, similar to mobile phones. There is also a variation that is played when a message arrives and it is a continuation of a thread.

Rated 3 out of 5 stars (15)
1,809 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)
1,290 users

Spamato4Thunderbird Requires Restart

A multi-faceted, collaborative approach against spam.

Rated 2 out of 5 stars (31)
0 users

Spamness Requires Restart

Visual representation of how spam-like messages are.

Rated 3 out of 5 stars (20)
528 users

Splash! Requires Restart

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 (98)
9,854 users

Splash! (Compatibility Update) Requires Restart

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

Rated 3 out of 5 stars (18)
102 users

Splash! (Compatible version of Firefox 4) Requires Restart

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

Rated 1 out of 5 stars (2)
1 user

Spoof Detector Requires Restart

Extension for Email Spoofing Detection

Rated 2 out of 5 stars (1)
42 users

SQLite Manager Requires Restart

Manage any SQLite database on your computer.

Rated 4 out of 5 stars (233)
121,969 users

Squared Australis Tabs (Tb)

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

Rated 4 out of 5 stars (7)
541 users

SRB Lightning Requires Restart

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
3 users

SS Ancestry Quick Button Requires Restart

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

Not yet rated
20 users

Stacked Inspector Requires Restart

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

Rated 5 out of 5 stars (10)
152 users

StartupMaster

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

Rated 4 out of 5 stars (264)
19,904 users

Stationery Requires Restart

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 (104)
32,315 users

Statusus

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

Not yet rated
0 users

Steganografi menggunakan PIT dan PRNG Requires Restart

Add-on penyisipan pesan pada gambar menggunakan PIT dan PRNG

Not yet rated
1 user

Stego Block Requires Restart

Embeds a small secondary, encrypted message in an email, known as a Stego Block.

Rated 4 out of 5 stars (1)
7 users