Why can I see RSS feed without logging into Facebook?

I got the url of my rss feed from this link saying RSS(circled)

then I used it to get notifications but even if I logged out it still showed the updated notification feed. Please tell me about it. Shall one not share his rss url.

The RSS feed url is of the form: http://ift.tt/1yfBE3O

Can anyone explain the significance of each get parameters in url.

P.S.:I have changed the key for security reasons.