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⇱ Firefox 149 Beta Released With Convenient Split-View Mode - Phoronix


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Firefox 149 Beta Released With Convenient Split-View Mode

Written by Michael Larabel in Mozilla on 25 February 2026 at 08:17 PM EST. 25 Comments
Following the Firefox 148 release with the new AI controls, Mozilla promoted Firefox 149 to beta today.

Most notable for end-users with the Firefox 149 Beta is now having the new split view mode option by default. Split view mode has been riding on by default in Firefox Nightly the past month and now it's in the Firefox 149 Beta 1 milestone.

👁 Firefox 149 Beta


Hopefully the split view mode continues working out well during the beta period and then Mozilla is able to keep the option available by default in next month's Firefox 149.0 official release.

👁 Firefox 149 Beta


The Firefox 149 Beta also brings better robustness of HTTP/3 upload performance on unstable network connections, a new Reporting API, and other enhancements.

Downloads and more details on today's Firefox 149 Beta release via Firefox.com.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.