HTML5 - cache manifest working great on Chrome but not on Firefox and Opera

Question

I am developing a web app for offline use, thus I need to use the application cache functionality.

Everything works great on Chrome (15.0.874.106) but is doesn\'t wo

Answer 1

Try removing:

header("Cache-Control: max-age=0, no-cache, no-store, must-revalidate");
header("Pragma: no-cache");
header("Expires: Wed, 11 Jan 1984 05:00:00 GMT");

so that you are only sending the Content-type header:

ApplicationCache forces caching (oversimplifying, but not by much). Those first three headers are ways to prevent caching.

Opera appears to prevent caching when those headers are present. Firefox' debugging tools are a bit wonky when it comes to debugging AppCache, but it's probably save to assume this will fix it there as well.