mullvad-browser: 15.0.2 -> 15.0.3
Release announcement: https://github.com/mullvad/mullvad-browser/releases/tag/15.0.3
Corresponding Firefox ESR: https://www.firefox.com/en-US/firefox/140.6.0/releasenotes/
Fixed Firefox security vulnerabilites: https://www.mozilla.org/en-US/security/advisories/mfsa2025-94/
(cherry picked from commit 17ce0894819cd42f27fe485eea50d3f90f0b6dc1)