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Thunderbird Send

FileLink provider for Send

Copyright © 2020 Teal Dulcet

Thunderbird add-on/MailExtension to easily and securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send) and send the links via e-mail using the CloudFile/FileLink API. Firefox Send was discontinued by Mozilla in 2020. It is now maintained by @timvisee and called just Send, but soon will be resurrected by Thunderbird.

  • Enables simple, yet private file sharing with end-to-end encryption
  • Files are securely encrypted and uploaded locally in Thunderbird using the Web Crypto and WebSocket APIs
  • Files are encrypted and uploaded in chunks, so it requires very little memory (RAM) for even large files
  • Links are automatically added to the e-mail by Thunderbird when uploads finish, which includes the encryption secret needed to decrypt the file
  • When recipient clicks a link, the file will securely download and decrypt locally in their browser using that encryption secret
  • Links automatically expire after the download and time limit
  • Desktop notifications when the uploads start and finish
  • Users can specify the Send service instance(s) to use, defaults to the one provided by @timvisee: https://send.vis.ee
  • Users can specify the download and time limits for each file and defaults for each Send service instance
  • Users can optionally protect each file with a password
  • Can securely generate a strong password or passphrase
  • Supports the maximum file size supported by each Send service instance, currently 20 GiB
  • Supports canceling the uploads
  • Supports deleting the files from server after uploads finish
  • Supports all v3 (or greater) Send service servers/instances
  • Does NOT require a Firefox Account (FxA) or any other accounts, all uploads are anonymous
  • Supports the light/dark mode of your system automatically
  • Follows the Thunderbird Photon Design

More information on the encryption used can be found in the official Send service documentation here.

❤️ Please visit tealdulcet.com to support this extension and my other software development.

⬇️ Download from Addons.thunderbird.net (ATN).

This add-on is not affiliated with Mozilla, Firefox or any Send service instance.

Contributing

Pull requests welcome! Ideas for contributions: