Language Support and Translation
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Simple Locale Switcher
Requires Restart
An easier management of the user interface language
Dictionary Switcher
Requires Restart
Toggles dictionaries automatically or manually and displays the currently selected one
Transliterator
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.
Rikaichan Japanese-English Dictionary File
Requires Restart
This is a dictionary file add-on for the Rikaichan extension.
Quick Locale Switcher 2
Requires Restart
Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.
Last Dictionary for Mail
This extension will remember the last dictionary used in the Mail Compose window and use it when composing new messages.
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!"
Moji
Requires Restart
An integrated sidebar-dictionary for Japanese and Chinese including kanji dictionary.
UrlCorrector
Type web addresses always in Latin letters no matter of your current keyboard layout.
mid
Requires Restart
More than 2000 dictionaries in 270 Kilobyte! Search multiple dictionaries at once!
Rikaichan Japanese-Dutch Dictionary File
Requires Restart
This is a dictionary file add-on for the Rikaichan extension.
Mukparasi
Requires Restart
A Korean popup dictionary based on Rikaichan
Requires the additional dictionary addon.
Mukparasi Korean-English Dictionary File
Requires Restart
A Korean-English dictionary file for Mukparasi.
Diccionario de sinónimos ES
Requires Restart
Adds to browser Spanish(ES) synonyms dictionary from package LibreOffice.
Словарь синонимовъ RU
Requires Restart
Adds to browser Russian(RU) synonyms dictionary from package LibreOffice.
To create your own collections, you must have a Mozilla Add-ons account.