After years of missing HDR video on Windows, Firefox now enables it by default in version 148 Nightly. The feature is experimental, but it already works on supported systems.
HDR means High Dynamic Range. For video, it improves bright areas without losing detail, dark scenes with clearer shadows, and richer, more natural colors.
On Windows 11 with an HDR-capable screen, HDR video looks noticeably better than standard video. Chrome and Edge already offer this experience. Firefox users on Windows have waited much longer.
Mozilla added full HDR video support to macOS earlier. Windows took longer because of graphics handling, drivers, and how HDR behaves at the system level.
Firefox 148 Nightly changes that. HDR video playback now runs by default in Firefox 148 Nightly on Windows. Users no longer need to turn on hidden settings to test it.
It is worth noting that HDR works best when HDR mode is turned on in Windows Display Settings. If HDR stays off, the graphics driver can apply tone mapping. That often makes video look flat or incorrect.
Mozilla also warns that users may need to refresh the page after enabling HDR. Without a refresh, the change may not apply to the current video session.
Users must enable HDR at the system level, otherwise driver tone mapping can make HDR video look dull or incorrect
How to turn on HDR in Windows 11
- Open Settings,
- Go to System and click Display
- Select your HDR monitor
- Turn "Use HDR on"
After that, refresh the video page in Firefox, even restart Firefox if needed.
This is a real quality gain for people with HDR displays using Firefox Nightly on Windows They get better video quality when HDR streams are available and have less reason to switch to Chrome or Edge for watching content.
In summary, Mozilla has enabled HDR video support on Windows starting with Firefox Nightly 148, and it’s still available in newer Nightly builds, such as Firefox 149.
That’s not all. Firefox is testing a unified trust panel to make website security easier to understand.
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