Blink in Google Chrome prior to 55.0.2883.75 for Linux, Windows and Mac executed javascript: URLs entered in the URL bar in the context of the current tab, which allowed a socially engineered user to XSS themselves by dragging and dropping a javascript: URL into the URL bar.
https://security.gentoo.org/glsa/201612-11
https://chromereleases.googleblog.com/2016/12/stable-channel-update-for-desktop.html