This release also improves support for screen readers accessing mathematical formulas embedded in PDF documents.
Mozilla has published today the final builds of the Firefox 148 open-source web browser ahead of its official unveiling on February 24th, 2026, so it’s time to take a look at the new features and improvements.
The biggest change in Firefox 148 is the long-awaited AI kill switch feature, which is implemented in Settings as “AI Controls”, allowing you to completely disable all the AI features that had been included in the past few releases. Firefox’s AI features can be disabled entirely or selectively.
Firefox 148 also improves support for screen readers accessing mathematical formulas embedded in PDF documents, support for viewer local weather on the New Tab page, and a new “Suggestions from Firefox” option in Search > Address bar settings to get suggestions from the Web related to your search.
For Android users, this release introduces a refreshed toolbar with a modern design and improved customization support, and a “Copy link text” context menu item to copy the text associated with a link. For Windows users, Firefox 148 improves the dragging of downloaded images into Adobe Illustrator.
For web developers, Firefox 148 brings support for the Trusted Types API, support for the CSS shape() function, support for the Sanitizer API, service worker support for WebGPU, support for the location.ancestorOrigins attribute, and support for the position-try-order property.
It also makes the initial empty document Web-compatible and introduces a joint iteration proposal that adds new Iterator.zip and Iterator.zipKeyed methods to allow zipping together underlying iterators into an iterator over values grouped by position, similar to zip in many other languages.
As mentioned before, Mozilla plans to officially unveil the Firefox 148 release tomorrow, February 24th, 2026, along with the Firefox 140.8 and 115.33.0 ESR releases. Until then, you can download the source tarball and binaries for 64-bit, 32-bit, and ARM64 systems right now from Mozilla’s download server.