# Mullvad Browser 15.0.19

- Product: Mullvad Browser (https://whatsnew.fyi/product/mullvad-browser)
- Vendor: Mullvad VPN
- Date: 2026-07-24
- Version: 15.0.19
- Original notes: https://github.com/mullvad/mullvad-browser/releases/tag/15.0.19
- Permalink: https://whatsnew.fyi/product/mullvad-browser/releases/15.0.19
- 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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- **changed** — Updated Firefox to 140.13.0esr
- **changed** — Updated NoScript to 13.6.31.1984
- **fixed** — Backport Security Fixes from Firefox 153

* All Platforms
   * Updated Firefox to 140.13.0esr
   * Updated NoScript to 13.6.31.1984
   * Bug 558: Rebase Mullvad Browser stable onto 140.13.0esr [mullvad-browser]
   * Bug 45124: Backport Security Fixes from Firefox 153 [tor-browser]
##### Build System
   * All Platforms
     * Bug 41838: Update personal_access_tokens URL in tools/fetch_changelogs.py [tor-browser-build]
   * Windows
     * Bug 41819: Fix windows-rs URL in projects/firefox/config [tor-browser-build]