Add-ons
Appearance and Customization
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about:config Button
Open about:config to change hidden settings that cannot be edited from the Options window. All Mozilla based programs have settings that can not be changed in the options window.
Add-on Compatibility Check
Featured
Checks all installed add-ons for compatibility with Thunderbird ESR (yearly updates) and Thunderbird Release (monthly updates).
Addon-Info/Sync/Compatibility
* List addons: max version on ATN, version installed, compatibility with TB 91, description
* Show addon compatibility on addon button
* Print, copy to clipboard or email
* Indicate missing addons upon receiving the email from another TB ('sync')
AddressBook in Tab
Requires Restart
Adds a button that can be put in toolbars which opens the addressbook in a new tab like pastismans AddressBookTab
AdvancedTasks
Requires Restart
Thunderbirds Lightning Extension: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.
Alarm - Reminders & Notifications
A simple and reliable browser alarm extension. Create alarm and never miss important tasks, meetings, or events
All Menus Button
Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.
ansitel Click-to-Dial
This plugin will call a selected number by clicking the right mouse button.
ansitel Click-to-Dial MT
Requires Restart
Dieses Plugin ermöglicht das Wählen von markierten Rufnummern im Mozilla Thunderbird mit ansitel VoIP-Telefonanlagen. Einfach Rufnummer markieren und per Rechtsklick mit der Maus loswählen.
ansitel Click-to-Dial Thunderbird
Requires Restart
Click-to-Dial Plugin für ansitel VoIP-Telefonanlagen zum Markieren und Wählen von Rufnummern in Mozilla Thunderbird.
Anthropic Claude Spaces Tab
Unofficial Anthropic Claude add-on for Thunderbird, it adds a button in Spaces that opens a Claude tab, and a contextual menu entry to send highlighted text to Claude.
AntiLostFilter
archive-by-time
With the filter function comes with thunderbird, all emails met rules will be moved to a specific folder. As time passed the folder would grew bigger and I wanted to put all emails into sub folders classified by year.
Articles Toolbar
Attachment Viewer: view in a tab, slideshow
View attachments in TB
Images, office files, mp3, mp4, text, js
Use Dropbox viewer for 175 file types (in v4)
* Docx, xlsx, pptx, pdf preview
* Slideshow of images
* Zoom/drag
* Rotate/flip image
* Download dialog with thumbnail of image
AttachmentCount
Adds a column to the Thunderbird message list to always display the true attachment count. An icon is shown for single attachments or all attachments deleted/detached. Tooltip preview of single attachment content and summary for multiple attachments.
Audio Attachment Player
Allows playing audio attachments (mp3, wav) directly within the email message view. Keywords: Audio Attachment Playback, mp3, wav, Audio Preview.
Audio Preview
Adds a preview for audio files (wav, ..) to the message view, so it can be played directly.
Auto Layout Switcher
Automatically switches between classic and wide mail layout based on Thunderbird window width.
Auto Profile Picture
Upgrade your Thunderbird experience with intelligent and clearer sender visualization that transforms how you identify and manage emails — making email management smoother and more intuitive.
To create your own collections, you must have a Mozilla Add-ons account.
