I don't use Chrome or its developer tools, but I do use Firefox's. They work well for my needs, because I can inspect network requests, including editing and re-sending them, and I can debug JS.

Wait, how do you edit/resend a network request?

Using the network inspector, there's a button when you click on a specific request to edit and resend it.

Here's a SO answer: https://stackoverflow.com/a/28775346

Thank you! This is my new killer feature!