Open Image In New Tab

Adds a context menu item to open images in a new tab

One-Click Forward

Forward emails directly through a dropdown of predefined recipients.

Configure recipients in settings. Use the message toolbar button "Quick Forward" to open a dropdown with your recipients and forward directly, or hold Shift to edit first.

RM: EXTERNAL: Requires Restart

Removes 'EXTERNAL: ' from the start of an email subject if it is preceded by 'RE:' or 'FWD:' (case insensitive). The removal is done after the 'Send' button is pressed.

QuickMultiselect Requires Restart

Adds a column with checkboxes so that you can select multiple messages with only a mouse click.

Quick Folder Key Navigation

This extension makes it possible to quickly navigate to a particular folder in the folder pane simply by typing the first few letters of the folder name when the folder pane has focus.

Options Menu Requires Restart

Quick access to extension options dialogs

Hyperactive Requires Restart

Scans hyperlinks in composed messages and alerts if one of the hyperlinks is broken.

MinimizeToTray Reanimated Requires Restart

MinimizeToTray Reanimated is an application mainly dedicated to Thunderbird to allow its minimization in the systray in one click. It is the update of MinimizeToTray Revived, which is not maintained anymore since the recent versions of Thunderbird.

Sender Name Requires Restart

Hide Duplicates From 'All Mail'

Hides duplicate emails from the 'All Mail' folder upon clicking on a result from Global Search, so that if one email is in both the 'All Mail' folder (e.g. of Gmail) and another folder (e.g. 'Sent'), it'll only show the email from the other folder.

CardDAV Browser

A utility to browse vCards stored on a CardDAV server.

This version is only for Thunderbird. There is a SeaMonkey version available if needed.

Restart App Button

Restart the current application, as you might need to do after installing a new extension or theme.

Serial Letter Requires Restart

Provides the ability to start writing a template-derived letter directly from within the address book. Supports also multiple recipients. Supports only TeX and similar systems at the moment.

nomapi Requires Restart

not a mapi plugin

Don't Forget CC Requires Restart

添付ファイルを送信する際、指定されたアドレスがCCに含まれているかを検査します

MEGAbird Requires Restart

Add MEGA support to Thunderbird's Filelink feature.

Tools > Options… for Linux

Moves Edit > Preferences to Tools > Options…

Spamato4Thunderbird Requires Restart

A multi-faceted, collaborative approach against spam.

TamilVisai (TamilKey) Requires Restart

A utility for typing in Tamil language. It will be ideal for Tamil bloggers...

WhatsApp - Thunderbird

Adds browser action icon to toolbar to open WhatsApp.