Safari extension cookies not recognized/passed

Question

I've recently been porting a Chrome extension to Safari, and encountered this kind of error (bug, feature, etc.)

So, in global page i have a XMLHTTP request to a secure page which is available only after you login.

Example:

1. I simply login using browser - as usually you do on facebook or other secure pages
2. After that, in global page, I load a login-only-available xmlhttp - and it says i'm not logged in

it seems that global page somewhat has it's own cookies, so a secure page thinks i'm new

ps: in Chrome i can load that page and it thinks i'm acting on behalf of logged in user, so i guess there are some restrictions in Safari

pps: i heard there's a Block third-party cookies option in Safari, but even if i checked it to "Never block" it still doesn't work

Answer 1

Unfortunately the problem is still existent in safari 5.1.7 windows version.

I've found a workaround to pass login credentials (username/password pairs) to the global page using message passing and global page use them to login silently.