With the new LibreWolf build 131.0.2-1:
https://github.com/adeii/supermium-portable/releases/download/F130/librewolf-131.0.2-1-x64-portable-win7.7z
The problem with HLS videos is back
It's been explained in this post:
https://board.eclipse.cx/viewtopic.php?p=4871#p4871
Same behavior and same workaround, the error occurs when the player tries to automatically change the video resolution. If you quickly pause the video and force a video resolution then no error message and the video is playing fine.
It was fine with previous build v130, so it looks like if LibreWolf isn't built with the R3dfox libraries we have this problem.
From about:support :
Graphics
Features
Compositing WebRender (Software D3D11)
Failure log
(#0) Error Failed to connect WebRenderBridgeChild. isParent=true
(#12) GP+[GFX1-]: [D3D11] 2 CreateTexture2D failure Size: Size(1280,720)texture11: false Code: 0x80070057
(#13) GP+[GFX1-]: [D3D11] 2 CreateTexture2D failure Size: Size(854,480)texture11: false Code: 0x80070057
(#14) GP+[GFX1-]: [D3D11] 2 CreateTexture2D failure Size: Size(1024,576)texture11: false Code: 0x80070057
I don't have these errors with previous LibreWolf for Win7&8 builds and with R3dfox.