Firefox 141 Organizes Tabs with AI, Plus More Features

New Features in Firefox 141

Firefox 141 brings a range of exciting updates and improvements, enhancing both functionality and user experience. One of the most notable features is the integration of AI to help users organize tab groups. This local AI model works without sending any data to the cloud, ensuring privacy while automatically grouping similar tabs and suggesting appropriate names for each group. Mozilla plans to roll out this feature gradually over the next few weeks.

Another significant enhancement is the ability to use the address bar as a unit converter. This built-in tool recognizes various units of measurement, including metric and imperial units for length, mass, temperature, force, and angles. Additionally, it supports time zone conversions. For example, typing “10:00 CEST in EDT” will show the equivalent time on the US East Coast when it's 10:00 in Germany during summer time. Similarly, “now in JST” will display the current time in Japan. Users can also convert units like kilometers to miles or Celsius to Fahrenheit, with results automatically copied to the clipboard upon clicking.

For those who prefer vertical tabs, introduced in Firefox 136, the latest update allows more space for additional tabs by minimizing the toolbar at the bottom of the sidebar. This makes managing multiple tabs more efficient and visually appealing.

Enhanced Content Loading

Firefox has continued to improve how it handles embedded content from third-party platforms. Since version 136, placeholders have been displayed when websites embed content from Instagram or TikTok, with the actual content loading only after a click. This approach helps reduce unnecessary data usage and improves page load times. With Firefox 138, support was extended to X/Twitter, and now, with Firefox 141, Disqus is also supported. This means users can now interact with embedded content from these platforms more seamlessly.

Security Improvements

Firefox 141 includes several critical security updates. According to Mozilla’s 2025-56 Security Advisory, over 18 vulnerabilities have been addressed in this release. Two of these, CVE-2025-8027 and CVE-2025-8028, are classified as high risk. These involve issues with the JavaScript JIT compiler IonMonkey, where incomplete handling of 64-bit return values could lead to potential exploitation. Four other vulnerabilities were internally discovered and also categorized as high risk. The remaining fixes are considered medium or low risk, but they still contribute to overall system stability and security.

Updates for Firefox ESR

Mozilla continues to support three generations of Firefox ESR (Extended Support Release) versions: 140, 128, and 115.

Firefox ESR 140.1.0 is the most up-to-date among these and is expected to remain supported until September 2026. It includes fixes for at least 14 security vulnerabilities, which have also been resolved in Firefox 141.

Firefox ESR 128.13.0 is the latest version of the previous generation, which is approaching its end of life. This update addresses at least nine security issues. Meanwhile, Firefox ESR 115.26 focuses on resolving four security flaws, but it is only available on Windows 7/8.1 and macOS 10.12 to 10.14 systems. In August 2025, Mozilla will decide whether to continue supporting Firefox ESR 115.

Future Releases

Mozilla plans to release upcoming versions, including Firefox 142 and Firefox ESR 140.2, ESR 128.14, and ESR 115.27, on August 19, 2025. Firefox ESR 128 will receive its final update in August, as will Firefox ESR 115, pending Mozilla’s decision. These updates ensure that users continue to benefit from the latest security patches and feature enhancements.