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https://stackoverflow.com/questions/7798748/find-out-whether-chrome-console-is-open/48287643#48287643

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detect firebug
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if (window.console && window.console.firebug) {
    //is open
};
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Files
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[debugger-method]
Very disruptive

[request-animation-frame-method]
The original example downloaded from the web, which detects whether the inspector is open or closed

[tostring-method]
this method won't work.

[setinterval-method]
test1.thml: earse a part of html when the inspector is open
test2.html: not working
hide-whole.html: erase the whole html when the inspector is open.
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==> Use 'hide-whole.html'
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