# Thunderbird 153.0 — Thunderbird 153.0

- Product: Thunderbird (https://whatsnew.fyi/product/thunderbird)
- Vendor: MZLA Technologies
- Date: 2026-07-21
- Version: 153.0
- Original notes: https://www.thunderbird.net/en-US/thunderbird/153.0/releasenotes/
- Permalink: https://whatsnew.fyi/product/thunderbird/releases/153.0
- 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 Unified folders now display account color indicator with account name tooltip OAuth login for mail accounts now opens in default web browser Thundermail services can now be used without ins…

- **added** — Unified folders now display account color indicator with account name tooltip
- **changed** — OAuth login for mail accounts now opens in default web browser
- **added** — Thundermail services can now be used without installation