Chrome Version: 59
OS: Android
getInstalledRelatedApps explainer:
https://github.com/WICG/get-installed-related-apps/blob/master/EXPLAINER.md
states that "This feature only works with sites using HTTPS" and "The User Agent should return no installed applications when running in a privacy preserving mode".
Therefore, it should be disabled when in a non-secure (http://) connection or in incognito mode in Chrome.
Comment 1 by bugdroid1@chromium.org
, Mar 21 2017