Tamper Data is a Firefox add-on to track and modify HTTP/HTTPS requests.
Is there a Google Chrome extension that can do the same?
You can use RestEasy. Just put in all the headers, save the capture and then once you do that, you can modify the body to whatever data fits. I suggest using Inspect Element to retrieve the POST data. It is a one-way workaround, because technically, you can't edit http requests, but I found that you can fire your own.
Try using DevTools (Console Chrome Developer Tools) which are designed for that.
However it's probably not possible to modify HTTP requests in Chrome due to API restrictionsSO.
Some workarounds include:
or using proxies:
From API perspective, check