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Firefox 148 Expected February 24 with Navigation API Support

Firefox 148, scheduled for release on February 24, 2026, adds support for the Navigation API and introduces centralized AI controls allowing users to block all generative AI features with a single switch.

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Firefox 148 is currently in Beta testing and ships on February 24, 2026, bringing significant improvements to web platform capabilities and user control features. The release focuses on modern web APIs, developer tools, and privacy-focused AI controls that reflect Mozilla's commitment to user choice.

Navigation API Support

Firefox 148 adds support for the Navigation API, which provides the ability to initiate, intercept, and manage browser navigation actions. The API serves as a successor to previous web platform features such as the History API and window.location, addressing their long-standing shortcomings. This brings Firefox into alignment with other major browsers that have already implemented the specification, improving cross-browser compatibility for modern web applications.

Centralized AI Controls

Mozilla makes headlines with Firefox 148 by implementing centralized AI controls, enabling users to block all generative AI features with one simple switch. This update reflects Mozilla's dedication to offering user choice and privacy in the age of AI, allowing users who prefer to avoid AI-powered features to completely disable them rather than managing individual settings across different contexts.

Modern JavaScript and CSS Features

The release includes support for ES modules in service workers, aligning Firefox with other major browsers and improving compatibility for modern web apps that rely on modular JavaScript architecture. Firefox 148 also adds support for CSS Module Scripts, allowing stylesheets to be imported using the JavaScript module system and import attributes. These additions continue Firefox's push toward full compliance with modern web standards.

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