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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".

Rated 3 out of 5 stars (413)
2,150 users

Ukrainian dictionary

Ukrainian (uk-UA) spellchecking dictionary

Rated 5 out of 5 stars (58)
8,796 users

Google Encrypted

Encrypted google.com search

Rated 5 out of 5 stars (27)
559 weekly downloads

Duck Duck Go (SSL)

Duck Duck Go is a search engine that does not collect or share personally identifiable information. This search bar add-on utilizes SSL to protect searches between You and Duck Duck Go.

Rated 5 out of 5 stars (16)
558 weekly downloads

General Catalan dictionary

Free Catalan (general version) spelling dictionary.

Rated 4 out of 5 stars (40)
11,721 users

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.

Rated 4 out of 5 stars (82)
9,025 users

Unofficial Qwant Lite

The purpose of the site http://lite.qwant.com (hereafter “the Website”) is to provide a light version of the Qwant Search Engine (https://qwant.com). This version is compatible with the previous versions of Windows Internet Explorer 9.

Rated 5 out of 5 stars (6)
479 weekly downloads

German Dictionary, classical spelling standards

German Dictionary according to the classical spelling standards for spell-checking in Firefox and Thunderbird

Rated 5 out of 5 stars (20)
9,275 users

Torrent

Search for Torrents across all the major Torrent Trackers and Torrent Directories.
Torrent is a simple interface to the IPduh Torrent Search

Rated 4 out of 5 stars (8)
424 weekly downloads

Russian Hunspell dictionary

Создан на основе словаря Лебедева. Файл аффиксов постепенно переписывается, словарь ежедневно пополняется. Релиз выкладывается один раз в месяц первого числа.

Rated 3 out of 5 stars (65)
9,480 users

Hungarian Dictionary

This extension is based on László Németh's Hungarian Dictionary

Rated 4 out of 5 stars (56)
8,452 users

Makepolo Search

Accurate purchasing search engine. http://en.makepolo.com/

Rated 4 out of 5 stars (4)
375 weekly downloads

Český slovník pro kontrolu pravopisu

Slovník pro kontrolu pravopisu pro aplikace Mozilla

Rated 4 out of 5 stars (36)
14,132 users

German Dictionary, extended for Austria

German dictionary (new Orthography) for spellchecking in Mozilla products, extended with Austrian words

Rated 5 out of 5 stars (22)
5,196 users

hongxing cross the wall search

hongxing search cross the wall .
hongxing browse ,the extension on mozilla : https://addons.mozilla.org/zh-CN/firefox/addon/247541/
the others IE ,chrome ,safari ,opera extensions is here: http://fwall-w.appspot.com

Rated 3 out of 5 stars (11)
350 weekly downloads

German Dictionary (Switzerland)

Dictionary with Swiss variants of German words for spellchecking in Mozilla products

Rated 5 out of 5 stars (3)
13,666 users

Swedish Dictionary

Swedish spell-check dictionary.

Rated 5 out of 5 stars (22)
6,456 users

Google.de

Google Deutschland

Rated 3 out of 5 stars (13)
296 weekly downloads

Danish Dictionary for the Spell Checker

Danish dictionary for Firefox, Thunderbird and other Mozilla products.

Rated 3 out of 5 stars (25)
3,947 users

Dogpile

Dogpile.com Web Search

Rated 5 out of 5 stars (35)
284 weekly downloads