# Mullvad Browser 16.0a11

- Product: Mullvad Browser (https://whatsnew.fyi/product/mullvad-browser)
- Vendor: Mullvad VPN
- Date: 2026-09-03
- Version: 16.0a11
- Original notes: https://github.com/mullvad/mullvad-browser/releases/tag/16.0a11
- Permalink: https://whatsnew.fyi/product/mullvad-browser/releases/16.0a11
- Labels: Pre-release; 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'.

---

- **changed** — Updated Firefox to 153.2.0esr
- **security** — Backported security fixes from Firefox 155
- **changed** — Changed GCC sources mirror to https://gcc.gnu.org

* All Platforms
   * Updated Firefox to 153.2.0esr
   * Bug 45259: Backport Security Fixes from Firefox 155 [tor-browser]
##### Build System
   * All Platforms
     * Bug 41860: Change GCC sources mirror to https://gcc.gnu.org [tor-browser-build]