Mozilla has launched Firefox 144 and Thunderbird 144, bringing updates to its browser and email client. While Thunderbird focuses on fixes, Firefox introduces new features alongside the end of support for 32-bit Linux systems. These releases aim to enhance user experience with security improvements and AI integrations.
Firefox 144 arrived on October 15, 2025, followed closely by Thunderbird 144. The email client update is mainly a maintenance release, addressing 28 bugs and including a dozen security fixes, with no new features announced.
In contrast, Firefox 144 packs several enhancements. Tab groups, first introduced on April Fool's Day in Firefox 137, receive further refinements. Users can now see the current tab even when a group is collapsed, and groups remain collapsed during drag-and-drop operations. This builds on the LLM-assisted automatic group naming added in Firefox 141.
Security gets a boost with tougher encryption for the built-in password manager. For video users, the picture-in-picture feature allows closing the video without pausing it first. The browser's local automatic translation expands to include Azerbaijani, Bangla (also known as Bengali), and Icelandic, while improving support for 17 existing languages.
Some features roll out progressively. Built-in image search via Google Lens requires Google as the default search engine and may not be available to all users immediately. Profile management improvements let users on Linux, macOS, and Windows 11 name profiles, assign colors, and add custom avatars; Windows 10 support is coming soon.
AI integration deepens with Perplexity's LLM-augmented search appearing in the address bar for select users. However, 32-bit Linux users face a major change: Firefox 144 marks the end of official x86-32 support. The Firefox 140 Extended Support Release will receive updates for about another year. As open-source software, the code remains available, allowing distributions like NetBSD and OpenBSD to maintain their own 32-bit builds.