The web console and JavaScript debugger do not sanitize all output that can be hyperlinked. Both will display `chrome:` links as active, clickable hyperlinks in their output. Web sites should not be able to directly link to internal chrome pages. Additionally, the JavaScript debugger will display `javascript:` links, which users could be tricked into clicking by malicious sites. External Reference: https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/#CVE-2018-5167
Acknowledgments: Name: the Mozilla project Upstream: Wladimir Palant