Mediawmfdxvad3d11enabled
In summary, the setting media.wmf.dxva.d3d11.enabled is a built-in instruction for Firefox that asks, "When playing a video, should I use my computer's for hardware-accelerated decoding via the Direct3D 11 API?" By default, Firefox has this preference set to true (enabled) on supported Windows systems.
While mediawmfdxvad3d11enabled offers significant benefits, there are also some challenges and limitations to consider: mediawmfdxvad3d11enabled
Some users report that disabling this—along with related settings like media.wmf.vp9.enabled —resolves lag on sites like YouTube or Twitch. In summary, the setting media