Firefox 60.0b10, in Developer Tools Network when XHR is checked, a option Edit and Resend lose functionality. It’s intentional?
Yeah, this seems to be a known bug, As soon as pressing “Edit and Resend”, the sidebar vanishes until you remove the filter, then the new request item is visible in the request list.
This is already fixed. So, please let us know if you still see some issues with this.