Language Support

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Quick Locale Switcher

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 4 out of 5 stars (69)
322,620 users

Quick Translator

The most lightweight and easiest translator. Translate between more than 50 languages with one click or a hot key. Translate from one word to a whole page.

Rated 5 out of 5 stars (361)
231,132 users

新同文堂 (New Tong Wen Tang)

NewTongWenTang is a tool to switch display Chinese content between traditional and simplified glyphs (中文繁簡體互轉工具)

Rated 4 out of 5 stars (84)
46,169 users

Rikaichan Japanese-English Dictionary File

This is a dictionary file add-on for the Rikaichan extension.

Rated 5 out of 5 stars (4)
34,665 users

Dictionary Switcher

Toggles dictionaries automatically or manually and displays the currently selected one

Rated 4 out of 5 stars (145)
24,124 users

www.Translate

Multi-Translator from Google, Bing and Pragma.
Translation tool for your Firefox and Thunderbird with a simple and friendly interface.

Rated 4 out of 5 stars (18)
16,458 users

Rikaichan Japanese Names Dictionary File

A dictionary file for Rikaichan.

Rated 5 out of 5 stars (3)
13,307 users

Dictionary Switcher for Thunderbird

Toggles spelling dictionaries automatically or manually and displays the currently selected one in the status bar.
Now merged with Dictionary Switcher v1.3 for Firefox/SeaMonkey

Rated 4 out of 5 stars (25)
12,832 users

Transliterator No Restart

Transliterator allows as-you-type conversion of text from one alphabet to another, as well as transliteration/detransliteration anywhere within documents.

Rated 5 out of 5 stars (65)
8,307 users

WordReference Translator

Open a tab with WordReference's translation for the selected word. Through a floating link, or by pressing "D" key.

Rated 3 out of 5 stars (27)
8,018 users

Finnish spellchecker

Finnish Spellchecker

Rated 3 out of 5 stars (75)
7,223 users

No Small Text No Restart

No longer tolerate unreadable text! Set a minimum font size for all web content. Toggle it on and off with a toolbar button.

Rated 4 out of 5 stars (27)
5,250 users

EHTip

Word translation in tooltip with English⟷Croatian dictionary already incorporated.

Rated 5 out of 5 stars (50)
5,222 users

Babylon Dictionary Word Search

Find the definition for a selected word in a web page or an email.
Right click over the selected word, choose the option "Search in Babylon" and that's it! You will have a new window with the definition of the selected word.

Rated 4 out of 5 stars (35)
4,614 users

Todoist for Thunderbird

Todoist is a leading online task manager and we manage millions of todos! Todoist for Thunderbird makes it super easy to manage your todos and email directly from Thunderbird.

Watch a short video:
https://www.youtube.com/watch?v=VixEQJb5Qc0

Rated 4 out of 5 stars (9)
4,503 users

abcTajpu

Type in accented letters, international characters or symbols into Firefox or Thunderbird, either simply by using a context menu (there being support for many languages), or quickly by keyboard macro (you can even define your own).

Rated 4 out of 5 stars (67)
4,295 users

Right Encoding

Adds the Character Encoding menu to the context menu

Rated 4 out of 5 stars (13)
3,950 users

AVIM

An input method editor (IME) for Vietnamese. Type fully-accented Vietnamese directly into any Web page or dialog box using a standard keyboard.
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Bộ gõ tiếng Việt để nhập dấu trực tiếp vào bất kỳ trang Web và hộp thoại dùng bàn phím bình thường.

Rated 5 out of 5 stars (26)
3,875 users

Rikaichan Japanese-German Dictionary File

A dictionary file for Rikaichan.

Rated 5 out of 5 stars (1)
3,345 users

South African English spell checker

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)
3,151 users