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Mozilla released Firefox 152.0.1 to fix crashes and instability affecting systems with Intel Raptor Lake processors. The failures were tied to a CPU-related issue that appeared during optimized execution paths, including JIT-compiled code and C++ workloads, and Mozilla said a similar mitigation had already been shipped in Firefox 151.0.1.
The reports linked the instability to a specific instruction pattern, mov byte ptr [rsi + rdi + 1], ch, which can be generated by LLVM 22, including for Rust code. Mozilla said the browser update addresses the resulting failures seen on affected Raptor Lake platforms, highlighting a hardware-sensitive problem that surfaced during compilation and runtime optimization.
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Mozilla released Firefox 152.0.1 to address crashes and instability associated with Intel Raptor Lake processors. The issue was described as a CPU-related problem affecting optimized execution, including JIT-generated code and C++ workloads, with references to an LLVM 22-generated instruction pattern.
Mozilla said a similar fix for crashes and instability linked to Intel Raptor Lake processors had already been included in Firefox 151.0.1.
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Mozilla released **Firefox 151.0.3** to address multiple security vulnerabilities that could lead to denial-of-service conditions, memory corruption, and **arbitrary code execution** on affected systems. The update was highlighted in an EG-FinCIRT security notice urging organizations to review and apply the patch after appropriate testing. Among the issues cited is **`CVE-2026-10701`**, an incorrect boundary conditions flaw in the **Graphics: Text** component with a **CVSS score of 7.5**. The advisory also references **`CVE-2026-10702`** and indicates that enterprises should prioritize deployment of the updated browser version to reduce exposure to exploitation.
Jul 8, 2026
Mozilla released **Firefox 152** for desktop and web platforms alongside **Firefox ESR 140.12.0** and **115.37.0**, delivering browser, developer, and mobile updates that include experimental **JPEG XL** support in Firefox Labs, changes to the Notifications and Pointer Lock APIs, `CSS field-sizing`, PDF handling improvements, and new Android features such as AI-assisted tab grouping and enhanced link-sharing options. The release also fixes **77 security vulnerabilities**, with Mozilla stating that **60** were memory-safety bugs and that some could potentially be exploited for **arbitrary code execution** when processing specially crafted content. The patched issues include groups tracked as **`CVE-2026-12328`**, **`CVE-2026-12327`**, and **`CVE-2026-12326`**, making the update a significant security release for both standard and ESR Firefox users.
Jul 12, 2026
Mozilla released **Firefox 155** and maintenance updates for Firefox ESR 153.2.0, 140.15.0, and 115.40.0. The release remediates **109 security vulnerabilities**, including memory-safety issues that malicious websites could potentially exploit for arbitrary code execution or other browser compromise; organizations should prioritize deployment across managed Firefox installations. Firefox 155 also introduces an experimental AI-assisted “Smart Window” feature for a limited user set, alongside web-platform, developer-tool, PDF viewer, Android, HTTP/3, WebAssembly, CSS, JSON, WebTransport, and Windows controller updates. Several experimental platform capabilities remain disabled by default and can be enabled through `about:config`; the release also changes captive-portal detection from `detectportal.firefox.com` to `firefox-portal-detection.com`.
Sep 5, 2026