Attach from Clipboard Requires Restart
Create file attachments directly from the system clipboard.
Reply As Original Recipient Requires Restart
Reply with the From: field set to the To: field from the original email.
Reply To All Reminder Requires Restart
Asks for confirmation when "Reply" instead of "Reply to All" is pressed on an email with multiple recipients.
SMTP Switch Reborn Requires Restart
A powerful ad blocker that blocks ALL ads but ads from publishers who shares revenues with targets YOU choose.
Ad Blocker lets you block all ads, tracking & malware from the web world. It is an effective solution to browse the web without offensive and annoying ads you hate to see.
Thunderbook Requires Restart
Export messages (including RSS items) as e-books.
Checkbox Column Requires Restart
Adds a custom column to Thunderbird's messages list (thread tree), making it easier to select multiple messages on devices with a touchscreen display.
Reinstates the extensions.checkCompatibility preference.
Stego Block Requires Restart
Embeds a small secondary, encrypted message in an email, known as a Stego Block.
Image Zoom (ugly fixes) Requires Restart
An ugly attempt at fixing Image Zoom
AastraClickToCall Requires Restart
Converts telephone numbers into clickable links for use with Aastra IP Phones
MultiTemplateLoader Requires Restart
Manages & applies multiple HTML templates when creating/replying messages.
Templates may be either local files or online links (http:// or ftp://). Up to 9 templates can be defined and easily switched, also using shortcut keys.
Identity Checker Requires Restart
This add-on checks to sender identity when send a message.
Layout Button Requires Restart
A toolbar button to switch between layouts.
Large Fonts Requires Restart
This add-on enables you to change the font size of the plain text editor of Thunderbird.
LookOut (fix version) Requires Restart
LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).
Support: Thunderbird and SeaMonkey
TexTra Thunderbird Requires Restart
This plugin adds our savvy email templates to your Thunderbird toolbar.