How to get long live access token from Facebook (60 days)

As of July 2015 you can now create a 60 day access token easily in Facebook

The first you need to grant permissions to your app to get an access token.

https://developers.facebook.com/tools/accesstoken/

Copy User Token and paste it to EXISTING_ACCESS_TOKEN and change your APP_ID and APP_SECRET

https://graph.facebook.com/oauth/access_token?             
    client_id=APP_ID&
    client_secret=APP_SECRET&
    grant_type=fb_exchange_token&
    fb_exchange_token=EXISTING_ACCESS_TOKEN