Out of focus

[QuantifiableGaming]

Does this work even if the website is running in the background ?

[JohnHoder]

What do you mean by "running in the background"?

[QuantifiableGaming]

I mean the website is open but the user is actively using another program

[JohnHoder]

No, it's javascript, it's range of access is limited to the injected webpage, i.e. one tab :)