[lukan]

"don't think about triggering a focus change event on your browser, it gets reported)."

So .. my approach would be to just open dev tools and deactivate that event.

Show of practical skill or cheating?

[supriyo-biswas]

Switching to devtools also triggers a focus change and is detectable by other means (such as repeatedly invoking a debugger statement).

[lukan]

One can type in devtools withouth having the focus on dev tools, but indeed, to track down the event, one has to loose focus for a while. But after you find out what line of js is needed, then you can just inject that without dev tools with greasemonkey for instance.

But probably a general solution exists ... and there are actually extensions that will do that in general.