Input does not work in Unity 5.5.0p4

Greetings. I use Unity 5.5.0p4. I have a script that allows the user to drag camera with right mouse button. Code is simple:

Code (CSharp):

1. if (Input.GetMouseButtonDown(1)
2.     camera.controller = new MouseBasedCameraController(camera);

(Variable "camera" is a wrapper for Unity camera)

Script with this code is attached to a valid, enabled GameObject and is called from its Update method. I tested it in editor and it works.
Then I compiled the game for WebGL and this did not work.

I changed the code:

Code (CSharp):

1. if (Input.GetMouseButtonDown(1) {
2.     camera.LookAt(400, 400);
3.     Debug.Log("works");
4. }

So if condition is true, camera looks at empty space and debug console shows the word "works" and I can say does input work or not. I tested different types of input and there are results:

• Clicking GUI Buttons, typing text in Input Fields: works both in editor and WebGL.
• Input.GetMouseButton, GetMouseButtonDown, GetMouseButtonUp, mousePosition: works in editor, does not work in WebGL (all buttons).
• Input.GetKey, GetKeyDown, GetKeyUp: does not work at all, debug console shows nothing.

How to solve my problem?

 

Do you solve this problem?