Topic
Mozilla
Can Wi-Fi Owners See Your Google Search History? HTTPS, DNS, SNI and ECH Explained
Privacy & Surveillance
Mozilla Firefox 156 Optimizes JPEG Image Handling to Cut Memory and CPU Usage
Other
Mozilla Adds Built-in Ad Blocker to Firefox for iOS Devices
Privacy & SurveillanceMozilla Revokes GPG Signing Key After Accidental Upload to Private GitHub Repository
Mozilla has replaced the GPG key used to sign certain Firefox and Thunderbird builds following an accidental exposure of the unencrypted secret key in a private GitHub repository. The key was intended for signing Linux archives, RPM packages, and checksum files, raising theoretical risks of supply-chain attacks through forged installers. Company audits found no evidence of external misuse, as repository access was limited to a small group of employees who already held legitimate access to the key. Most users require no action, though those manually verifying GPG signatures must import the new key along with revocation data for the old one. Linux administrators installing Firefox via RPM packages on distributions such as Fedora, RHEL, Rocky Linux, AlmaLinux, openSUSE, and SUSE may need to manually update the key to avoid installation failures. Thunderbird users are unaffected by the RPM issue since no official RPM packages are released for the email client. The new key remains valid until August 5, 2028, with public details available in updated KEY files and on keys.openpgp.org.
Firefox JIT Vulnerability Exposes Tor Browser Users to Remote Code Execution
A high-severity flaw in Firefox's SpiderMonkey JavaScript engine allows remote code execution simply by visiting a malicious page, directly impacting Tor Browser users on unpatched versions. Registered as CVE-2026-10702, the vulnerability stems from incorrect memory handling in the JIT compiler that leaves a dangling reference to freed memory, enabling arbitrary read and write primitives. Researchers demonstrated successful exploitation that can compromise the browser's content rendering process and facilitate user deanonymization or OS-level attacks. The same issue served as the initial stage in the IonStack exploit chain against ARM64 Android devices, where it was chained with CVE-2026-43499 in the Linux kernel to achieve root privileges. Mozilla addressed the issue in Firefox 151.0.3, and the Tor Project rolled out corresponding fixes in Tor Browser 15.0.19, which also incorporates the latest Firefox ESR updates.