WebGL AR Game

Hi, I'm new. I need to make a simple 2D game with AR elements that can run on both mobile and desktop browsers. I'm checking if the Unity is the right game engine to make it.

1) Does Unity 5.6 support such development (I guess it needs WebGL with AR)?

2) Will it encounter many problems in loading speed, camera access and browser compatibility?

3) Is there any online sample I can take a look?

Hope that some experienced Unity developer can share your insights. Thanks.