This version includes important security updates to Firefox.
Windows Package Signature Issue
The DigiCert EV code‑signing certificate we use to sign Windows installation packages expired on September 1st and we are currently in the process to renew it. This process is delayed and not yet complete. This has caused Windows users trying to install Tor Browser 15.0.21 and 15.0.22 from scratch to receive “bad signature” warnings. As a temporary work‑around, for Windows only we are keeping Tor Browser 15.0.20 (the latest correctly signed version) listed on our download page, relying on automatic updates (which are signed with a different key, not involving this expired certificate) to bring Windows users to the current version. Users who prefer to download the latest version directly, ignoring the certificate expiration warning, can download it from the distribution directory.
Full changelog
- All Platforms
- Updated NoScript to 13.6.33.1984
- Bug tor-browser#45296: (H1) SharedWorker Identity Mismatch allows WebAssembly execution at Safer
- Bug tor-browser#45297: (H1) Missing setHTMLUnsafe hook leaves a permanent WebAssembly‑capable child realm at Safer
- Bug tor-browser#45299: Backport Security Fixes from Firefox 156
- Bug tor-browser#45303: Rebase Tor Browser stable onto 140.16.0esr
- Bug tor-browser-build#41875: Update relprep.py for the new versions.ini URL
- Windows + macOS + Linux
- Updated Firefox to 140.16.0esr
- Linux
- Bug tor-browser#44996: Change the 32‑bit linux message to the expired version for the final 15.0 release
- Android
- Updated GeckoView to 140.16.0esr
- Build System
- All Platforms
- Bug tor-browser-build#41871: Update downloads repository references in relprep templates
