Thunderbird extension: insert Reviewed-by

A Thunderbird MailExtension that adds an R-b button to the compose window and inserts a Reviewed-by: line for the currently selected sender identity at the current cursor position.

Structure

• manifest.json defines the extension metadata, permissions, and compose button.
• background.js resolves the active sender identity and inserts the text into the editor.
• icons/compose-button.svg provides the R-b toolbar icon.

Shortcut

The extension also defines a keyboard shortcut for the compose action:

• Ctrl+Alt+R on Linux and Windows
• Command+Alt+R on macOS

Thunderbird lets you change extension shortcuts in its shortcut settings UI.

Build a package

Use the provided Makefile from the project root:

• make or make xpi builds dist/r-b-button-<version>.xpi
• make zip builds dist/r-b-button-<version>.zip
• make clean removes the dist/ directory

Load the extension

1. Open Thunderbird.
2. Open Add-ons and Themes.
3. Select Extensions.
4. Click the gear menu in the Add-ons Manager.
5. Choose Debug Add-ons.
6. Click Load Temporary Add-on....
7. Select the manifest.json file from this folder.

Behavior

When the R-b button is pressed in the compose window, the extension:

1. reads the currently selected sender identity,
2. builds a Reviewed-by: line from that identity,
3. inserts it at the current cursor position in the message body.

The inserted text uses this format:

• Reviewed-by: Full Name <[email protected]>
• Reviewed-by: [email protected] if the identity has no display name

Notes

• The extension uses the identity currently selected in the compose window.
• Thunderbird 128 or newer is required by the manifest.
• The keyboard shortcut triggers the same compose action as clicking the R-b toolbar button.