AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.3.3" />

.NET API 504,832 bytes

 QuirksMode

public enum QuirksMode
A list of possible quirks mode states.
Limited = 1

The quirks mode is partly activated.

Off = 0

The quirks mode is deactivated.

On = 2

The quirks mode is activated.