Disable Recieving Buffer In Firefox (or Other Browsers)

I got trouble with web browsers buffering (not chaching). I call this php script : sleep(5); echo '1st step'; echo (str_repeat(' ',256)); sleep(5); echo ''; echo '2nd s

Solution 1:

Oh, I guess I need to make the answer an answer, not a comment, so you can accept it.

The HTML5 charset sniffing buffer size is 512 bytes. So the response needs to either have 512 bytes of padding or set a charset (via <meta> tag or HTTP header).