Reminded once again why you should never use 301/308 permanent redirects after spending yonks trying to clear one for Firefox after testing on localhost.
Hint: Checking the Disable Cache checkbox under Network did the trick.
(Stick to 307s and you’ll lead a happier life. Nothing in software dev is permanent. Future you will thank you later. And the first person who replies “buh, seo!” will get a swift telling off.) :)
