UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Steps to reproduce the problem:
1. Run this command:
console.log(new Intl.NumberFormat('is-IS', { maximumSignificantDigits: 3 }).format(number));

What is the expected behavior?
123.000

What went wrong?
The call returns 123,000.

Firefox does this correctly.

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 63.0.3239.132  Channel: stable
OS Version: 10.0
Flash Version: