AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.8.7" />

.NET API 1,175,040 bytes

 IContextService

public interface IContextService : IService
Defines methods to create or find browsing contexts.
IBrowsingContext Create(IConfiguration configuration, Sandboxes security)

Creates a new browsing context without any particular name.

IBrowsingContext Create(IBrowsingContext parent, string name, Sandboxes security)

Creates a new browsing context with the given name, instructed by the specified document.

IBrowsingContext Find(string name)

Tries to find a browsing context with the given name.