There's also a feature request and proof-of-concept patch to implement persistent preferences for viewers who aren't logged in. The proof-of-concept already rem

There's also a feature request and proof-of-concept patch to implement persistent preferences for viewers who aren't logged in. The proof-of-concept already remembers whether the max width toggle is enabled: https://phabricator.wikimedia.org/T321498 https://phabricator.wikimedia.org/T321498