https://github.com/dan-q/protonmail-encryption-indicators-for-thunderbird

Thunderbird plugin to show E2E-encryption status for ProtonMail Bridge emails.
https://github.com/dan-q/protonmail-encryption-indicators-for-thunderbird

protonmail protonmail-bridge thunderbird thunderbird-addon thunderbird-extension

Last synced: 2 months ago
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Thunderbird plugin to show E2E-encryption status for ProtonMail Bridge emails.

• Host: GitHub
• URL: https://github.com/dan-q/protonmail-encryption-indicators-for-thunderbird
• Owner: Dan-Q
• License: gpl-3.0
• Created: 2020-10-06T18:00:01.000Z (almost 5 years ago)
• Default Branch: main
• Last Pushed: 2020-10-06T19:13:54.000Z (almost 5 years ago)
• Last Synced: 2025-07-14T17:59:09.390Z (3 months ago)
• Topics: protonmail, protonmail-bridge, thunderbird, thunderbird-addon, thunderbird-extension
• Language: JavaScript
• Homepage:
• Size: 15.6 KB
• Stars: 11
• Watchers: 4
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: COPYING

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README

          
## ProtonMail Header Display

### Description

A [Mozilla Thunderbird](https://www.thunderbird.net/) plugin to improve integration with [ProtonMail Bridge](https://protonmail.com/bridge/).

ProtonMail adds `X-PM-*` headers to your mail to indicate whether it was end-to-end (E2E) encrypted and whether it came from another ProtonMail address, but these aren't easily-visible in Thunderbird. This plugin shows you the encryption status of each email as you view it. There are four statuses:

![E2E encrypted internal mail from other ProtonMail users, PGP-encrypted email from non ProtonMail users, encrypted mail stored encrypted by ProtonMail, and completely unencrypted mail such as stored locally in your Sent or Drafts folder](https://danq.me/wp-content/uploads/2020/10/x-pm-display.png)

### Building

To build from source, run e.g.

```

cd source

zip ../protonmail-header-display.xpi *

```

### License

Open source, licensed under the [GNU General Public License v3.0 or later](https://spdx.org/licenses/GPL-3.0-or-later.html).

Icons made by [DinosoftLabs](https://www.flaticon.com/authors/dinosoftlabs) from [Flaticon](https://www.flaticon.com/), used under the [Flaticon License](https://www.freepikcompany.com/legal#nav-flaticon).