Version 2.2.0 — the Electronic Registered Delivery comes to Gmail

New
• Electronic Registered Delivery: send the electronic equivalent of a registered letter from Gmail. Your recipient is identified, then accepts or refuses; every step is timestamped and gathered in an evidence file.
• Up to 50 recipients in one registered delivery.
• A notification confirms that your registered delivery was taken into account after sending.
• The popup shows your monthly certified emails and your registered-delivery credits.

Changes
• One MailStone button for both products: choose Opposable Mail or Electronic Registered Delivery for each message.
• New sign-in with a code sent by email; your password never leaves your browser.
• Cc and Bcc recipients are flagged: only the main recipients receive the registered delivery.
• Clearer screens and messages, in French, English, Spanish, Portuguese and Arabic.
• Requires Firefox 140 or later.

Bug fix: persist refresh token at login so the background service worker can renew expired access tokens silently.

Major rewrite — MailStone V2 platform

• New certification workflow: pick a destination folder from
the MailStone button in the Gmail compose toolbar. The
extension auto-inserts the matching BCC address and a visual
certification header.
• Qualified eIDAS RFC 3161 timestamping + Stellar blockchain
anchoring on every certified email.
• Optional Acknowledgement of Receipt (A/R) with a tamper-
evident recipient confirmation hash.
• UI now in 5 languages: English, French, Spanish, Arabic,
Brazilian Portuguese.
• Migrated to Manifest V3 (required by Firefox).
• Security hardening: safer DOM rendering throughout, no
innerHTML interpolation in user-facing UI.

Note: this is a major version replacing v1.x. If you used the
previous extension, please log in again after the update to
re-establish your session against the new MailStone platform.