Top-Rated Extensions


QuickFilterPlus No Restart

Adds personal filters to quickfilter toolbar

Not yet rated
127 users

CardDAV Browser

A utility to browse vCards stored on a CardDAV server.

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428 users


Für die an SafeMail teilnehmenden Ärzte.

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9 users


fix behavior of notifications checkboxes in compose window when editing msg as new

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26 users


Für die an SafeMail teilnehmenden Ärzte.

Not yet rated
1 user

enMailing for Thunderbird

Encrypted email made easy.

Not yet rated
4 users

Set Default Columns

Provides ability to set default visibility of columns in the thread pane.

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56 users


Artificial intelligence-based aircraft parts procurement and RFQ sending tool for Thunderbird

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1 user


Send notification to notikeys on new message arrival

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5 users

IMAP Quota (Free Space)

This Thunderbird addon let you customize the behaiour of the IMAP quota statusbar panel.

Not yet rated
1,322 users



Not yet rated
176 users


A general-purpose JavaScript console for all Mozilla toolkit applications.

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6 users

Hide Option Pane

Provides ability to hide option panes.

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150 users


Provides global user stylesheet.

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130 users

Do Not Save Password

Prevents to save passwords.

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38 users

UI Text Overrider No Restart

Provides ability to override UI elements' label, tooltip text, etc.

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36 users

Always Default Client No Restart

Makes the application to the default client on every startup.

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10 users

Only Minor Update

Applies only minor updates of the application.

Not yet rated
248 users

Winmail Opener Bridge

Opens attached winmail.dat by Winmail Opener automatically.

Not yet rated
911 users

Attachemnt Encoding Detector

To detect file encoding of attachments, this forces to Thunderbird to use an encoding detector for a specific locale instead of the generic one.

Not yet rated
569 users