Can a Safari extension save cookies?

Is it possible for Safari extensions to save cookies locally instead of using the browser's cookies? The problem with HTTPS ajax requests bringing up开发者_如何学C a login popup is starting to rankle me. I know how to login to Google services from a command line script using curl and perl/php. If I can save my cookies somewhere on the local filesystem I can avoid all this hassle.

Nope. Safari extensions have no access whatsoever to the local filesystem. You can only use cookies directly from the browser or local storage.