A Chrome extension to clear your clipboard after exiting an incognito tab or window.
Make sure to allow this addon in incognito mode from the extension page or it won't do anything.
Seems like no one thinks this should be a feature of incognito mode:
https://bugs.chromium.org/p/chromium/issues/detail?id=46131
https://www.ghacks.net/2014/07/24/mozilla-changes-private-browsing-clipboard-handling-firefox-33