Fetch-url-file-3a-2f-2f-2f: Upd

The triple slash /// after a custom scheme is rare, but some systems interpret scheme:///path as an absolute path on the current host. Combined with fetch-url-file , an attacker could try to read local files if the scheme handler naively fetches from the filesystem.

: This scheme is used to access files on your own computer or local network rather than the internet. fetch-url-file-3A-2F-2F-2F

for security reasons (CORS, same-origin policy). The triple slash /// after a custom scheme

: Ensure your application is not double-encoding the colons and slashes, which can lead to "Bad URI" errors. fetch-url-file-3A-2F-2F-2F