Check and Send Requires Restart
Check the message contents and addresses before you send the message...
hubiC for Filelink Requires Restart
Add hubiC support to Thunderbird's Filelink feature.
Extra Format Buttons Requires Restart
Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.
Auto Resize Image Requires Restart
Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).
replyTo Requires Restart
Adds a menuitem to the Mail context Menu to Reply to a different Mailadress
ReplyWithHeader Requires Restart
Outlook style headers and few goodies for Thunderbird & Postbox.
Highlighter Requires Restart
Quickly highlight some text in Thunderbird message composing windows.
Flexible Identity Requires Restart
Selects an identity based on the recipients list when sending an email
Add menu commands for replying to multiple messages at the same time.
BorderColors GT Requires Restart
How many time you sent an email from your wrong email address?
This add-ons allows you assign a different color to the compose window border for each of your email addresses. So you can immediately view from what account are you writing.
Emoji Menu Requires Restart
Adds the ability to easily insert emojis into your composed messages in Thunderbird.
Attach from Clipboard Requires Restart
Create file attachments directly from the system clipboard.
random(signature) Requires Restart
Updates a given signature file in regular intervals.
Posting Style Enforcer Requires Restart
Automatically converts top-posted messages to use bottom-positng or vice versa. Interleaved posts are left alone. Detects automatically added text and supports a per-contact list of exceptions.
Toggle Word Wrap Requires Restart
Toggle word wrapping and PRE element wrapping in the message composition and HTML display windows, respectively.
Shrunked Image Resizer Requires Restart
Make your photos smaller, so they don't take forever to email or send to websites.
This extension is not being converted to a WebExtension.
Get before Send Requires Restart
Get messages for the account which is bound to the identity then send the message when you click the toolbar button or the menu item. If your SMTP sever authenticates using POP(IMAP) before SMTP, the extension is useful.
Macro Template is to replace mail templates with macros for date formatting.
EnForward Requires Restart
Save your email into Evernote by forwarding it to Evernote email address.
Before you use it, you need to specify your Evernote email address (see the screenshot).
This function can be invoked by "Forward to Evernote" in the context menu.
Signature Switch Requires Restart
Switch the signature on/off or choose a new one from your predefined set...