Reply Monitor v1.5.3 (Preview)

Submission validation fix for Thunderbird 140 and later.

• Declares that Reply Monitor does not collect or transmit data.
• Adds the required Firefox built-in data collection consent metadata.

Reply Monitor stores tracking data locally in Thunderbird and never sends messages automatically.

Reply Monitor v1.5.2 (Preview)

UI refinement release for Thunderbird 140 and later.

• Renames the toolbar action to ReplyMonitor.
• Adds a dedicated ReplyMonitor icon to the toolbar action.
• Separates messages with received replies into their own dashboard area.
• Highlights the received-replies area and cards for faster visual review.

Reply Monitor never sends messages automatically.

Reply Monitor v1.5.1 (Preview)

Reliability hardening for Thunderbird 140 and later.

• Prevents concurrent tracking updates from overwriting records.
• Uses stable tracking identifiers across restarts and message moves.
• Fixes local due dates near midnight and Message-ID-less message collisions.
• Preserves plain-text and HTML signatures in follow-up drafts.
• Correlates replies to follow-up messages after the user sends them.
• Deduplicates manual recent-reply scans.
• Adds automated tests, GitHub Actions CI, manifest-driven packaging, and the MPL-2.0 license in the XPI.

Reply Monitor never sends messages automatically.

Reply Monitor v1.5.0 (Preview)

Preview release: opens the dashboard from overdue notifications, calculates due dates in local time, and adds an on-demand scan for replies received in the last 30 days while the extension was inactive.

Reply Monitor v1.4.0 (Preview)

Preview release: adds Compose follow-up for awaiting-reply items. It opens a prefilled plain-text draft and never sends email automatically. Requires Thunderbird 140 ESR or later.

Reply Monitor v1.3.0 (Preview)

Release notes

v1.3.0 — 2026-08-23

First public preview release.

• Track and untrack sent messages with due dates.
• Dashboard for tracked, overdue, and due-today messages.
• Automatic reply detection using In-Reply-To and References headers.
• Configurable daily local reminders for overdue replies.
• Local-only storage and no automatic email sending.

Known limitations

• This preview XPI is unsigned; use temporary installation when Thunderbird
  requires signed add-ons.
• Reply detection requires standard reply headers.
• Native calendar integration is not included.