Access specific cookies by domain/name in Firefox extension

Question

I am developing a Firefox extension and need to access a specific cookie from a specific domain. I have this code which fetches all cookies for all domains, how do I request

Answer 1

You can use nsICookieManager2 interface (the original nsICookieManager interface was frozen and couldn't be changed which is why this extended version was created):

var cookieManager = Cc["@mozilla.org/cookiemanager;1"]
                      .getService(Ci.nsICookieManager2);
var count = cookieManager.getCookiesFromHost("example.com");

Note: the concept of frozen interfaces was dropped in Gecko 2.0 (Firefox 4). Since then some interfaces similar to nsICookieManager/nsICookieManager2 have been unified - so in a future Firefox version nsICookieManager2 might go away as well, all the functionality will be exposed on nsICookieManager then.