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More Snooze

This add allow to customize the snooze delay when snooze popup appears (lightning required).

Rated 5 out of 5 stars (10)
695 users

Evernote Tab

Add a button and a menu to open Evernote in tab.

Rated 3 out of 5 stars (9)
400 users

Valencian Catalan dictionary

Free Catalan (Valencian version) spelling dictionary.

Rated 4 out of 5 stars (32)
702 users

Greek Polytonic Spelling Checker

Διορθωτὴς πολυτονικῶν κειμένων σύμφωνος μὲ τὴν ἑλληνικὴ ἱστορικὴ ὀρθογραφία.

Rated 5 out of 5 stars (8)
22 users

Tamil Spell Checker for Firefox

Tamil Spell Checker Plugin for Firefox

Rated 1 out of 5 stars (1)
108 users

Macro Template

Macro Template is to replace mail templates with macros for date formatting.

Rated 5 out of 5 stars (9)
485 users

Corrector de Galego

Corrector ortográfico de galego baseado na Normativa da RAG do 2003.
Conten a versión comunidade.
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Galician spellchecking dictionary based on the 2003 RAG Standard.
This extension contains the version comunidade.

Rated 5 out of 5 stars (7)
1,247 users

Icelandic Dictionary

Icelandic Dictionary

Rated 4 out of 5 stars (14)
189 users

Greek Spellchecker - Dictionary

Ένα πλήρες συμβατό με τις τελευταίες εκδόσεις, Ελληνικό λεξικό, για όλες τις εφαρμογές της οικογένειας του Mozilla (Firefox - Firefox for Android - Mobile - Thunderbird - Seamonkey).

Rated 5 out of 5 stars (3)
136 users

Valencian Spellchecker

Valencian spellchecker dictionary created by RACV and packaged for Mozilla products by llenguaitecnologia.com.

Rated 3 out of 5 stars (33)
539 users

NestedQuote Remover

Remove nested quotes when replying to a mail.

Rated 4 out of 5 stars (13)
1,103 users

Single Domain

Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.

Rated 5 out of 5 stars (4)
99 users

Српски речник - Serbian Dictionary

Српски правописни речник - Serbian (Cyrillic and Latin) spellcheck dictionary

Rated 4 out of 5 stars (27)
799 users

Frisian Words list

Frisian Words list

Rated 3 out of 5 stars (4)
217 users

Expertspam

Report spam, false-positives or phishing back to your antispam provider.

Rated 2 out of 5 stars (11)
161 users

Received

Displays the "Received" header parsed with a regular expression.

Rated 5 out of 5 stars (4)
146 users

Geiriadur Cymraeg

Welsh MySpell Dictionary - The word-list was created as part of the Cysill software, developed by Canolfan Bedwyr, University of Wales, Bangor.

The Mozilla addon is a separate piece of work simply to connect the dictionary to Mozilla products.

Rated 5 out of 5 stars (7)
141 users

filemail

Move mails to the same folder where previously mails have been moved from this author by hitting a single key

Rated 4 out of 5 stars (16)
70 users

RemindIt

Help in reminding mails to be answer or sent again. Choose a reminder date for each received or send message that are highlighted in the message list, depending on their status (expired, soon to exprire, to be reminded). Sending a reminder is eased.

Rated 3 out of 5 stars (27)
666 users

Finnish Spellchecker

Finnish (fi-FI) spellchecker dictionary for Firefox, Thunderbird and SeaMonkey .

Rated 3 out of 5 stars (9)
422 users