[dicytea]

> some code that triggers only when you open the tools

I've seen this technique too, but I feel that this is a major flaw on the browser's side. It should be impossible to tell if the dev tools is open or not. Surely this can be done right?

[anticrymactic]

A LOT of things should be impossible for the website to tell. Focus, drm, mobile/Desktop

All (3) Browser engines are anti consumer spyware. There is no way to convince me otherwise. Why google and apple are not fixing this is obvious but Mozilla just keeps disappointing.

I'm desperately waiting for a Foss alternative.

[gloosx]

There is no reliable way to tell if they are, so developers have to either listen for sudden page height changes (which usually happens when the dev tool is open, however undocking it fixes the problem) or use one of the few dirty hacks with the Javascript objects, but these are getting patched every year.