**Found in** * Firefox 151.0a1 (2026-04-08) **Affected versions** * Firefox 151.0a1 (2026-04-08) **Unaffected versions** * Firefox 150.0b4 **Tested platforms** * Affected platforms: Windows 10 **Preconditions** * HDR capable display and HDR enabled in Windows settings -> Nightly opened on the HDR monitor. **Steps to reproduce** 1. Load and play a HDR capable movie/series on Netflix -> [Example](https://www.netflix.com/watch/81702189?trackId=14170286&tctx=1%2C0%2C54aaa5fd-bedb-4b6b-b2d4-22afd38da951-283091028%2CNES_6528B406331CF7618807454792F778-994911DC4F528C-728D21EA34_p_1775228588820%2CNES_6528B406331CF7618807454792F778_p_1775228588820%2C%2C%2C%2C%2CVideo%3A81485923%2CminiDpPlayButton) **Expected result** * The video uses HDR for video rendering and no issues occur **Actual result** * The video gitches and is unviewable **Additional Notes** * The issue can be seen in the [following attachment](https://drive.google.com/file/d/1knPkXp06ZN9k6hKC8eZgzVe0cwZiXzsR/view?usp=sharing). Filmed the difference from SDR display (integrated display of laptop) to HDR (the external display). * This is repducible by opening the video directly on the HDR display or by moving the window from an SDR one to HDR. * The videos work correctly on the SDR display (video directly opened on SDR display or moved from HDR to SDR it will revert and display correctly). * The about support infos are attached here as well.
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**Found in** * Firefox 151.0a1 (2026-04-08) **Affected versions** * Firefox 151.0a1 (2026-04-08) **Unaffected versions** * Firefox 150.0b4 **Tested platforms** * Affected platforms: Windows 10 **Preconditions** * HDR capable display and HDR enabled in Windows settings -> Nightly opened on the HDR monitor. **Steps to reproduce** 1. Load and play a HDR capable movie/series on Netflix -> [Example](https://www.netflix.com/watch/81702189?trackId=14170286&tctx=1%2C0%2C54aaa5fd-bedb-4b6b-b2d4-22afd38da951-283091028%2CNES_6528B406331CF7618807454792F778-994911DC4F528C-728D21EA34_p_1775228588820%2CNES_6528B406331CF7618807454792F778_p_1775228588820%2C%2C%2C%2C%2CVideo%3A81485923%2CminiDpPlayButton) **Expected result** * The video uses HDR for video rendering and no issues occur **Actual result** * The video gitches and is unviewable **Additional Notes** * The issue can be seen in the [following attachment](https://drive.google.com/file/d/1knPkXp06ZN9k6hKC8eZgzVe0cwZiXzsR/view?usp=sharing). Filmed the difference from SDR display (integrated display of laptop) to HDR (the external display). * This is repducible by opening the video directly on the HDR display or by moving the window from an SDR one to HDR. * The videos work correctly on the SDR display (video directly opened on SDR display or moved from HDR to SDR it will revert and display correctly). * Youtube videos are correctly rendered with HDR but suffer from performance issues from Bug 2029122. * The about support infos are attached here as well.