UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

Steps to reproduce the problem:
1. I started off with a <legend> element which had a width of 100%
2. I override that by giving it width: auto

What is the expected behavior?
The legend's width is supposed to shorten to the width of its textual contents.

What went wrong?
It used to work before, and it works with other browsers such as Google Chrome on my iPhone and Safari. It seems to me that the upgrade to version 61 of Chrome is doing something weird to it.

Did this work before? Yes Did not note which version of chrome that it worked on.

Does this work in other browsers? Yes

Chrome version: 61.0.3163.100  Channel: stable
OS Version: OS X 10.13.0
Flash Version: