Preload CSS file not supported on Firefox and Safari Mac

Question

I added the attribute rel=\"preload\" to all css links like this :

Answer 1

I have soulution this is works and best for website speed This is for normal code for every browser put as a default and for mozilla firefox use this, when file run in mozilla its show this code otherwise its show default css code 0 ){$browser = 'firefox';} if($browser=='firefox'){echo '';}?>