UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Steps to reproduce the problem:
1. Go to https://developer.mozilla.org/en-US/docs/Web/CSS/text-overflow
2. Search for "spaceship"

What is the expected behavior?
- Have a visual indicator on the scrollbar
- Maybe have a visual indicator in the corresponding element if the text is hidden (e.g., if you search for "asked")

What went wrong?
You don't.

Did this work before? N/A 

Chrome version: 69.0.3497.100  Channel: stable
OS Version: 10.0
Flash Version: 

This is a refiling of  Issue 760947 .