It's a known issue. See https://www.fxsitecompat.com/en-CA/docs/2016/flash-is-forced-windowless-mode-on-firefox-for-64-bit-windows-affecting-stage-3d/ for details.
On 2016-09-06 6:21 AM, [email protected] wrote:
Context3D not available! Possible reasons: wrong wmode or missing device support.only comes up on some games
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