Console Extensions: IContentPane.setContentUrl(...) POSTs?!?

Summary

POST Requests Fail when Developing Extensions Locally with Vue.js

Content

I'm trying to develop a console extension that implements a custom application for a customer. I've written quite a few workspace extensions, but I'm sort of inexperienced with console extensions. I've noticed that the function IContentPane.setContentUrl(...) sends a POST request rather than a GET request to its URL. This is problematic for me because I work primarily in Vue.js and I prefer to serve my extensions locally during development because it's so much more efficient.

This approach uses an init.html file that does nothing but redirect to