Hi DavidR,
The NoScript extension brought into Fx by default? You must be kidding. It would never be tolerated by their main sponsor - Google. I think we can wait a long time for that. Just install Ghostery extension and you will notice why, sometimes 6 trackers installed per page visited. If Firefox would implement this their main sponsor that likes to track your online ins and outs via script would go. Google would certainly frown upon NS being brought to Fx as default, at least the full flung version, and you can't go for less. For Flock same story with Yahoo as their main sponsor.
Flash cookies came in when users started to cookie cleanse on a large scale, and these Super cookies could restore the lost information. GoogleChrome was launched when ad blocking started on a larger scale.
User tracking and ad-serving are the big roadblocks to either NoScript brought in as default or RequestPolicy for that reason. These considerations overrule user security. Sad but that is the world we live in,
polonus