PHP download file does not show a progress bar solution

PHP download file does not show progress bar
I have a program that asks to rename the downloaded folder so I found the following code on the Internet:

Header ("Content-type:application/octet-stream");
Header ("Accept-ranges:bytes");
Header ("Content-type:application/force-download");
Header ("Content-disposition:inline;filename=". $filename);
Header ("Accept-length:". FileSize ($File));
@readfile ($File);//Read file to output cache


However, when downloading a file only shows how many open files ... The download progress is not displayed.

------Solution--------------------
May be the reason for the browser, you change Firefox browser try!
------Solution--------------------
Try a different browser, with Firefox.

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