There are some minor issues that we can probably easily improve.
- long word like links currently do not break. We should set break-word: break-all; under media width 720px. https://gerrit.wikimedia.org/r/c/jsdoc/wmf-theme/+/1014615/1..2
- sidebar menu doesn't scroll when opened https://gerrit.wikimedia.org/r/c/jsdoc/wmf-theme/+/1008546
- parameter tables overflow the viewport T359113: Handle table overflow