On Sat, Aug 22, 2020 at 11:42 PM Fulko Hew <fulko.hew@gmail.com> wrote:

Dang!   Which web development tool did you use?

I mentioned it twice above... Firefox.
In the Tools menu, the Web Developer option, and selecting the Network portion.
It shows all the fetches, the responses and timing info.
(Once you start the tool, you do have to re-fetch the page for it to be captured.)

Chrome too has a similar tool, under a similar menu path.