Rated 4 out of 5 stars

per Malnormalulo el gen. 5, 2015 ·

I can't tell you how many times I as a web developer have used this to debug a problem. Far and away more useful than those multitudes of extensions which only monitor headers. The one drawback -- and it's not a small one -- is that it relies on the cache to display some information, so that information isn't available for uncached responses.