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British English Dictionary (Marco Pinto)

A fork of Mark Tyndall's add-on, based on David Bartlett's
British Dictionary R1.19 for Firefox, Thunderbird and SeaMonkey.

Rated 5 out of 5 stars (83)
168,565 users

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Auto Resize Image Requires Restart

Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).

Rated 4 out of 5 stars (62)
192 users

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English United States Dictionary

English United States (en-US) Dictionary as shipped with Thunderbird 115 ESR and Firefox 115 ESR.

Rated 4 out of 5 stars (39)
62,025 users

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French spelling dictionary

Spelling dictionary for the French language.

Rated 4 out of 5 stars (54)
125,933 users

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Deutsches Wörterbuch

Deutsches Wörterbuch (neue Rechtschreibung) für die Rechtschreibprüfung in Mozilla-Produkten

Rated 4 out of 5 stars (83)
277,005 users

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Diccionario de Español/España

Diccionario de Español/España

Rated 4 out of 5 stars (167)
64,046 users

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Brazilian Portuguese Dictionary (New Spelling)

The same spellchecker shipped with the Brazilian version of Firefox.

Rated 4 out of 5 stars (46)
7,550 users

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Wörterbuch Deutsch (de_DE)

Deutsches Wörterbuch igerman98 (de_DE, Deutschland, "neue" Rechtschreibung), für Firefox, Thunderbird und Seamonkey.

Rated 4 out of 5 stars (24)
42,809 users

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Dizionario italiano

Add support for Italian to spellchecking

Rated 4 out of 5 stars (72)
91,964 users

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LookOut Requires Restart

LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).

Rated 4 out of 5 stars (158)
830 users

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Polski slownik poprawnej pisowni

Polski słownik poprawnej pisowni dla Firefoksa, Thunderbirda i SeaMonkey.

Rated 5 out of 5 stars (50)
47,942 users

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Woordenboek Nederlands

Woordenboek Nederlands met de woordenlijst van OpenTaal.

Rated 3 out of 5 stars (70)
24,915 users

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Русский словарь проверки орфографии

Русский словарь проверки орфографии

Rated 4 out of 5 stars (136)
16,401 users

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QuickNote Requires Restart

A simple note-taking extension.

Rated 5 out of 5 stars (204)
46 users

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Verificador Ortográfico para Português do Brasil

Possui a maioria das palavras existentes em português do Brasil, de acordo com o novo acordo ortográfico que entrou em vigor janeiro de 2009. É Atualizado constantemente.

Precisa de ajuda?
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Rated 5 out of 5 stars (76)
5,810 users

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Diccionario español México

Diccionario para México.

Rated 4 out of 5 stars (92)
8,048 users

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English (Australian) Dictionary

Australian English Dictionary for Mozilla applications.

Rated 4 out of 5 stars (126)
8,689 users

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Greek spellchecking dictionary

Ο επίσημος Ελληνικός ορθογραφικός έλεγχος για όλες τις εφαρμογές της οικογένειας του Mozilla (Firefox- Thunderbird- Seamonkey)

Rated 4 out of 5 stars (84)
8,231 users

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Corretor para Português de Portugal

Corretor ortográfico para Português de Portugal (pt-PT)

Rated 4 out of 5 stars (95)
9,133 users

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GuifiProxy Requires Restart

Simple proxy manager
- Change proxy with two clicks
- Import and export proxies lists
- Manually add, delete and edit proxies
- Automatic authentication on proxies (bypass popup with login and password)
- Proxysel replacement

Rated 4 out of 5 stars (20)
0 users

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