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Mark Subfolders Read

Adds a context option to folders for marking all contents of the selected folder and all subfolders as read.

Rated 4 out of 5 stars (2)
97 users

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Zulip - Quick Access

Quick Access to Zulip in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

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4 users

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Webpage Opener

Adds a button to the toolbar to open a user defined webpage.

Rated 5 out of 5 stars (1)
42 users

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Thunderbird Send [staging]

[Alpha Testing] Thunderbird send allows sending and receiving end to end encrypted files.

This add-on is undergoing testing and not yet available to the general public.

Rated 1 out of 5 stars (1)
35 users

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Antispam

Sending email to the Antispam database

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19 users

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AutoZoom

AddOn to save a text zoom for eMail text editor.

Rated 4 out of 5 stars (3)
111 users

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SimpleLogin - Easy Reach

An extension for Thunderbird that allows you to access SimpleLogin.

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10 users

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OWUI - Quick Access

This extension adds a simple button to your Spaces toolbar that opens in a new tab, providing you with one-click access to your Open WebUI Instance.

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3 users

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Balochi Spellchecker for UniBal Script

This add-on is a Balochi spellchecker based on the UniBal Balochi script.

This is a pre-beta version as the dictionary has 1000+ words and not all Balochi Affix rules are implemented.

Please use it and give your feedback

Rated 3 out of 5 stars (1)
1 user

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Tatar spellchecker dictionary

Tatar dictionary for spell-checking in Firefox and Thunderbird.

Орфографический словарь Firefox и Thunderbird для проверки правописания татарского языка.

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1 user

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Eesti keele (et-EE) pakk Thunderbirdile

Estonian (et-EE) language pack for Mozilla Thunderbird 2.0.0.*. Visit homepage for more info...

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0 users

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Lower Sorbian dictionary

Spellchecking dictionary for Lower Sorbian language.

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8 users

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Kiswahili Spell Checker

Kiswahili Spell Checker

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57 users

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Babyish spellchecker

Babyish Spellcheck dictionary

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3 users

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Browsing Enhanced ⁵︎  (Hide Caption T Plus)

⦁ Version 5 incoming!!
⦁ NEW! Floating Toolbars & Menus with autohide!
⦁ "Maximize your screen content space by adjusting Tabs, Toolbars, etc!".
⦁ Multiple Configurable Actions for both screen-corner buttons: App/'Home' & Close buttons!

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2 users

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ConfirmBeforeDelete

Ask a confirm before to delete some items

Rated 4 out of 5 stars (20)
445 users

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Owl for Exchange

Allows you to use your Exchange and Office365 email account with Thunderbird using Outlook Web Access (OWA).

Rated 5 out of 5 stars (205)
48,192 users

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Show Outlook Appointments (vcal / ics) Requires Restart

An extension to show embedded Outlook calendar (vcal / ics) parts.

Thunderbird doesn't show calendar parts from Outlook appointment emails. This addon adds a button to download the embedded appointment as ICS to import it into another calendar.

Rated 3 out of 5 stars (5)
31 users

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Flat Folder Tree (updated)

Flat Folder Tree enables you to selectively breakout sub-folders under intermediate folders in the folder pane view. This is an updated version of the existing addon, now compatible with Thunderbird 60.

Rated 3 out of 5 stars (5)
85 users

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FileLink Provider for Box

Uploads your large attachments to your Box instead of sending them by email.

Rated 3 out of 5 stars (13)
13,310 users

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