I tried Firefox debugger yesterday when one of the ads on one of the sites I managed somehow created a rogue redirect. The ad cached the redirect response in th

I tried Firefox debugger yesterday when one of the ads on one of the sites I managed somehow created a rogue redirect. The ad cached the redirect response in the browser, so on subsequent requests the browser continued to redirect without making a trip to the server. We happened to catch the error on FireFox on one of the machines and attempted to debug it there. The first problem was that the requests never showed up in the network tab. I typed in the URL with the network tab set to persistent and hoped that I would see the redirect response header in the network tab. But it never showed up. It loaded directly from cache I presume but it should still have showed up in the network tab or somewhere to allow debugging. I looked into the cache next and saw that the cached copy of the page contained a single script loading code (I presume this was what got cached for the page). Copying the HMTL from the cache page was fairly annoying. You can't copy the entire text because it's setup as HEX+HTML side-by-side. The HTML version replaces spaces with dots which means you pretty much can't copy it. Lastly, it would also be nice to prevent the developer tools from closing when a window self closes. Also, it would be nice to be able to manage cookies in the developer tools. Another thing I find annoying is that FF/Chrome both don't have a cookie debugger. There are plenty of add-ons but I am not sure why it's not part of the core developer tools. Would be nice to have.