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Mozilla released Firefox 152.0.2 to patch multiple security issues, including a vulnerability in MP4 processing and several browser weaknesses affecting file handling, URL processing, and privacy protections. The update also addresses issues tied to the file: URL scheme and hardens browser behavior around sensitive interactions that could affect local resource access.
Mozilla said the release includes additional protections relevant to web applications such as Proton Drive, along with interface and permission-handling changes that restrict features like screen color picking and the eyedropper tool. The company also indicated that a related file: URL fix is planned for Firefox 153, suggesting further tightening of local-file security controls in the next release.
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1 event from the most recent confirmed update back to the earliest known activity.
Mozilla released Firefox 152.0.2 to fix multiple security issues, including an MP4-processing vulnerability and other browser security and privacy weaknesses involving file handling and URL processing. The release also included hardening changes affecting interface and permission handling, with Mozilla noting an additional related "file:" URL fix is planned for Firefox 153.
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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
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