Recently the ability for anonymous users to disable multimedia viewer was removed. Some code associated with this feature does not look like it was updated or removed.
- The method showStatusInfo in bootstrap code doesn't look actionable. https://gerrit.wikimedia.org/g/mediawiki/extensions/MultimediaViewer/+/e5c3cb9f0f4a07ca4fb9fa1a128f60da03c6fe24/resources/mmv.bootstrap/mmv.bootstrap.js#433
- The static method static shouldShowStatusInfo() doesn't seem to do anything either.
- Config.setMediaViewerEnabledOnClick