Mozilla Firefox 153 adds native HDR video support on Windows

The addition of native HDR modernizes Firefox’s media stack, allowing it to remain a viable alternative for users with premium OLED and Mini-LED displays. By supporting VP9 and AV1, Mozilla secures high-quality playback for YouTube and other major platforms without relying on Chromium's Blink engine. However, the lack of sophisticated tone-mapping and support for streaming-only hardware profiles suggests the initial rollout targets high-end setups over the broader mobile PC market. Strategically, this reduces friction for users who prefer Firefox’s privacy controls but previously switched browsers for media consumption. Success will depend on how quickly Mozilla resolves the identified memory leak and implements more precise display adaptation.

The launch of Firefox 153 comes as the browser's global desktop market share remains at approximately 4.05% as of July 2026, per StatCounter and Cloudflare Radar. While Chrome continues to dominate at roughly 76%, Microsoft Edge holds second place on desktop with 9.14%, largely driven by its deep integration into the Windows ecosystem and early adoption of HDR and AI productivity tools. Mozilla’s update is part of a broader push to keep its independent Gecko engine technically equivalent to Chromium’s Blink, which currently powers approximately 78% of all web sessions.

Beyond media enhancements, Firefox 153 marks a transition to a new Extended Support Release (ESR) generation. This version also builds Firefox Containers natively into the browser, a feature previously requiring an extension to isolate work, personal, and shopping identities. Per Digital Trends in July 2026, other browsers like Brave have recently introduced similar tab-isolation features, reflecting a broader industry trend toward privacy-focused tab management.

Mozilla is already preparing a follow-up patch, Firefox 153.0.1, to include detailed HDR diagnostic information within the browser's internal support pages. This is intended to assist IT administrators and power users in troubleshooting the complex playback chain involving GPU drivers, Windows settings, and display firmware. In the enterprise sector, the rollout allows for more rigorous testing of HDR-compliant training and creative review workflows on an independent engine, though experts note that Firefox is not yet a color-critical reference tool due to the pending tone-mapping updates.