Looking at caniuse.com preconnect hasn't been supported by Firefox since v71. I assume for this very reason. https://caniuse.com/link-rel-preconnect https://ca

Looking at caniuse.com preconnect hasn't been supported by Firefox since v71. I assume for this very reason. https://caniuse.com/link-rel-preconnect https://caniuse.com/link-rel-preconnect