Hi folks, I sent out an 'intent to implement and ship' for adding FTP related schemes to the list of safelisted schemes for use with registerProtocolHandler. I'd like to solicit your opinion on this change. Thanks, - Asanka Summary Add "ftp", "ftps", and "sftp" to the list of protocols available for registration via registerProtocolHandler(). FTP is now deprecated and will imminently be removed from the codebase. Allowing websites to register themselves as handlers for ftp:// URLs makes it possible to build easy to use gateways for legacy ftp sites. In addition we propose adding related protocols "ftps" and "sftp" to the list. Google Chrome/Chromium was not handling these URL schemes. Blink componentBlink>HTML>CustomHandlers <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EHTML%3ECustomHandlers> Search tagsftp <https://www.chromestatus.com/features#tags:ftp>, registerprotocolhandler <https://www.chromestatus.com/features#tags:registerprotocolhandler> TAG review TAG review statusNot applicable Risks Interoperability and Compatibility Gecko: Worth prototyping ( https://github.com/mozilla/standards-positions/issues/513) Suggested filtering out credentials from outgoing FTP links. WebKit: N/A Safari does not support `registerProtocolHandler`. Web developers: Positive ( https://bugs.chromium.org/p/chromium/issues/detail?id=333943#c57) Security Same as other schemes in registerProtocolHandler. Since ftp was a protocol that used to be supported by the browser, internal ftp links might exist that assume in-browser support in assessing their security risks. A custom protocol handler will necessarily expose ftp URLs to the handler. Registering one may violate administrator assumptions about the URLs not leaving their organization when users click on them. Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md> ?No Flag name Tracking bughttps://crbug.com/1199027 Link to entry on the Chrome Platform Status https://www.chromestatus.com/feature/5762628536238080 Links to previous Intent discussionsIntent to Ship: https://groups.google.com/a/chromium.org/g/blink-dev/c/ABhlioapE0E/m/du8Jv9n...