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English (Australian) Dictionary
Signature Switch
Switch the signature on/off or choose a new one from your predefined set.
Greek spellchecking dictionary
Greek spellchecking dictionary Mozilla (Firefox- Thunderbird- Seamonkey)
European Portuguese Spellchecker
Lightning Calendar Tabs
Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.
British English Dictionary
British English Dictionary R1.19 for Firefox, Thunderbird and SeaMonkey by David Bartlett.
To enable, right-click in a multi-line text box, select "Languages", then "English / United Kingdom".
Ukrainian dictionary
General Catalan dictionary
Canadian English Dictionary
For some reason, Mozilla doesn't have a Canadian localization team, but I know that even the British dictionary doesn't quite cut it for the truly patriotic.
Emoji
German Dictionary, classical spelling standards
German Dictionary according to the classical spelling standards for spell-checking in Firefox and Thunderbird
Signal Spam
Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).
Russian Hunspell dictionary
Создан на основе словаря Лебедева. Файл аффиксов постепенно переписывается, словарь ежедневно пополняется. Релиз выкладывается один раз в месяц первого числа.
Confirm-Address
Hungarian Dictionary
Český slovník pro kontrolu pravopisu
Slovník pro kontrolu pravopisu pro aplikace Mozilla
German Dictionary, extended for Austria
German dictionary (new Orthography) for spellchecking in Mozilla products, extended with Austrian words
German Dictionary (Switzerland)
Dictionary with Swiss variants of German words for spellchecking in Mozilla products
To create your own collections, you must have a Mozilla Add-ons account.
