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Attach from Clipboard

Create file attachments directly from the system clipboard.

Rated 4 out of 5 stars (30)
6,316 users

Afrikaans spell checker

Afrikaans spell checker for Mozilla Firefox and Thunderbird

Rated 4 out of 5 stars (23)
1,558 users

German dictionary (de_CH)

German dictionary igerman98 (de_CH, Switzerland), for Firefox, Thunderbird und Seamonkey.

Rated 5 out of 5 stars (4)
4,606 users

German Dictionary (de-DE), classical and reformed

German Dictionary according to the classical or reformed spelling standards for spell-checking in Firefox and Thunderbird ++
Deutsches Wörterbuch nach den bewährten oder reformierten Regeln für die Rechtschreibprüfung in Firefox und Thunderbird

Rated 5 out of 5 stars (7)
2,294 users

Norsk bokmål ordliste

Norsk bokmål ordliste for Mozilla Firefox, Mozilla Thunderbird og SeaMonkey.

Rated 4 out of 5 stars (14)
2,874 users

Latviešu valodas pareizrakstības pārbaudes vārdnīca

Latvian spellchecker

Rated 5 out of 5 stars (13)
3,507 users

Bengali (Bangladesh) Dictionary

Bengali Bangladesh (bn-BD) spell checking dictionary.

Rated 5 out of 5 stars (44)
26 users

ReFwdFormatter

Remove the ">" prefix from quote when you make a reply.

[Source code] https://github.com/isshiki/ReFwdFormatter

Rated 4 out of 5 stars (15)
2,326 users

List Addons in Windows' Programs

List addons in Windows' "Add or Remove Programs".

Rated 5 out of 5 stars (1)
11,927 users

TexTra

Thunderbirdのメールのテキストを翻訳、辞書引きを行います。

Rated 4 out of 5 stars (2)
642 users

BiDi Mail UI

Direction control and BiDi-related charset misdetection correction

Rated 5 out of 5 stars (54)
1,855 users

Hindi Spell Checker

This is a real time spell checker for Hindi, supported on Firefox,
Thunderbird, and Seamonkey.

Not yet rated
182 users

Latin Dictionary

Latin dictionary

Rated 5 out of 5 stars (8)
350 users

Correct Identity

Ever sent mail from the wrong email address because you forgot to select the correct identity?

Rated 4 out of 5 stars (119)
2,256 users

Hebrew spell-checking dictionary (from HSpell)

Hebrew spell-checking dictionary for Firefox and Thunderbird. Generated from data of the HSpell project version 1.4, and distributed freely under the AGPLv3.

Rated 4 out of 5 stars (20)
814 users

Vietnamese Dictionary

Enables spell checking in Vietnamese with a wordlist based on Hồ Ngọc Đức’s Free Vietnamese Dictionary Project.

Rated 5 out of 5 stars (26)
380 users

Diccionario Ortográfico de Español Colombia

Este diccionario no constituye un diccionario de definiciones sino un diccionario destinado para la corrección ortográfica de Español Colombia (es-CO). Colombian spanish (es-CO) spellchecker.

Rated 5 out of 5 stars (4)
617 users

Slovar za slovenski jezik

Spell-checking dictionary for the Slovene language

Rated 5 out of 5 stars (16)
3,083 users

No Message Pane Sort

No Message Pane Sort prevents accidental resorting of the message pane by disabling mouse button clicks on the column headers, thus, locking the sorting order of your emails.

It is still possible to sort messages by ctrl-clicking the header.

Rated 5 out of 5 stars (57)
4,159 users

Unmangle Microsoft ATP Safelinks

Users of outlook.com and o365 who have Advanced Thread Protection enabled will have all URL's in emails changed to redirect them to an Microsoft filter before opening. This is a bad idea.

This plugin will change the URL back to the original value.

Rated 5 out of 5 stars (6)
821 users