EHTip Requires Restart
Word translation in tooltip with English⟷Croatian dictionary already incorporated.
CantoFish Requires Restart
CantoFish is a popup Cantonese-English dictionary for Firefox. It contains over 200,000 entries and works with both traditional and simplified Chinese characters. The Yale and Jyutping romanization systems are supported, as well as Mandarin pinyin.
Preslovar Requires Restart
Ћирилично/латинично пресловљавање, виртуална ћирилична тастатура - Serbian Cyrillic/Latin transliteration and Virtual Cyrillic keyboard
Simple Locale Switcher Requires Restart
An easier management of the user interface language
Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.
As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.
AVIM Requires Restart
Vietnamese-language input method editor (IME). Type diacritics directly into any Web page, Web app, or dialog box. Convenient, comprehensive, secure.
Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, hộp thoại.
SelectionSK Ancient Requires Restart
Pops up user menu with useful tools (copy, highlight, translation, search, etc.) when text is selected with the mouse.
Please migrate onto https://addons.mozilla.org/en-US/firefox/addon/selectionsk/
Look Up in Dictionary Requires Restart
Looks up a selected word in OS X's Dictionary.app
Equations Requires Restart
Insert inline LaTeX equations into e-mail messages.
Babylon Dictionary Word Search Requires Restart
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.
Zombie Keys (Multilanguage Keyboard) Requires Restart
Enter accents, diacritics, diaeresis, umlauts, ligatures etc. with keyboards of various countries (us,uk,ie,fr,it,ru,de,sv) - via easy to remember shortcuts or menu. Also supports all textboxes of the application (such as search, filters).
Rikaichan Japanese-English Dictionary File Requires Restart
This is a dictionary file add-on for the Rikaichan extension.
Zhong Wen Requires Restart
Mouse over a Chinese character to find out it's meaning. A popup will appear showing the 'Pinyin' pronunciation, the simplified character form, and the English translation. You can customize what parts to show on the preferences window.
ComposeRTF Requires Restart
Compose messages Right-to-Left or Left-to-Right. Unlike other addons which change the direction of typing of the whole message, this addon allows you to control the direction of an individual paragraph.
Rikaichan Japanese Names Dictionary File Requires Restart
A dictionary file for Rikaichan.
Set a minimum text size for all web content. Use the toolbar button to switch it on and off. NEW: Three preset sizes. NEW: Use mouse scroll on the toolbar button.
Right Encoding Requires Restart
Adds the Character Encoding menu to the context menu
Markov Dictionary Switcher Requires Restart
Based on Dictionary Switcher but more than a thousand times faster and you can choose dictionaries that you want to use. Detects the language of the message that you are composing and changes the spelling dictionary.
Dictionary Switcher for Thunderbird Requires Restart
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