Steps to get Posterous Bookmarklet working with Firefox NoScript add-on and 3rd party cookies disabled.

XSS

1. Open the NoScript preferences in Friefox: Tools > Add-ons > NoScript > Preferences
2.  Navigate to the Anti-XSS Protection Exceptions: Advance > XSS
3. Append the following regular expression in the text area: ^http://(?:\w+\.)*posterous\.com

Cookies

1. Open the cookie exceptions on Firefox: Preferences > Privacy > Exceptions
   
2. Then add posterous.com to the text box and click allow

Twenty years from now you will be more disappointed by the things that you didn’t do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.