UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.92 Safari/537.36

Example URL:
https://fetlife.com/users/sign_in

Steps to reproduce the problem:
1. Visit https://fetlife.com/users/sign_in
2. Hit the TAB key (on the left side of your keyboard) until the focus
is on the "Remember me, I'll be back." checkbox.

What is the expected behavior?
Still should be able to see tab position.

What went wrong?
On cannot tell that one is on the  "Remember me, I'll be back."
checkbox. Any clue is totally absorbed by the CSS.

Does it occur on multiple sites: N/A

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? No
 Mozilla Firefox 62.0

Chrome version: 69.0.3497.92  Channel: stable
OS Version: 
Flash Version: 

The whole point of accessibility is to be more powerful than what webpages do.