We have a corporate website, we officially support FF3, FF4, IE8 and IE9. Our web site is quite big, so we really need browser caching, first time page load is around 15 seconds. With files in the cache getting new page is less than a second. Everything works perfect except with FF3. With FF4, IE8, IE9 if we are on the website, clicking everywhere is fast, the page is in the cache. If we restart the browser, it is still fast, it loads files from the cache. But with FF3 we have a problem. Every time we restart the browser, it is loading the files again from the server, instead of using the local cache (checked with Firebug). I can reproduce the problem anytime, it is the same with every FF3 instances. I double checked, the "clear history when Firefox closed" option is not enabled. Could you advise please how to use the local cache either after browser restart? Thank you! Chris