Decoded, it becomes: callback-url-file:///proc/self/environ

Here's a story:

From that day on, Emma's team kept a close eye on the /proc/self/environ file, ever vigilant for any suspicious activity. The encoded URL had taught them a valuable lesson: even the most seemingly innocuous URLs can hide secrets.

What a delightfully encoded URL! Let's decode it and create a full story around it.

Emma's eyes widened as she decoded the URL. The /proc/self/environ path referred to a special file in Linux, which contained the environment variables of the current process.

The URL is: callback-url-file:///proc/self/environ