# Thunderbird 153.0 — Thunderbird 153.0esr

- Product: Thunderbird (https://whatsnew.fyi/product/thunderbird)
- Vendor: MZLA Technologies
- Date: 2026-07-22
- Version: 153.0
- Original notes: https://www.thunderbird.net/en-US/thunderbird/153.0esr/releasenotes/
- Permalink: https://whatsnew.fyi/product/thunderbird/releases/153.0-61768a17
- Labels: Platforms: Desktop

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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What’s New Visual signatures can be added to PDF attachments opened in Thunderbird 'Copy Message Link' and 'Copy News Link' added to header pane 'More actions' Accessiblity is improved in various tree…

- **added** — Visual signatures can be added to PDF attachments opened in Thunderbird
- **added** — 'Copy Message Link' and 'Copy News Link' added to header pane 'More actions'
- **changed** — Accessibility is improved in various tree views