Refusing to provide an RSS feed is one thing, but what Firefox is doing is removing "reader-y" code that other people have written better, plus axing live bookmarks which I never liked.
That is to say, what Firefox and Datastreamer are deciding about RSS appears to be unrelated. However, as a cocreator of RSS, you probably know that HTML -- which is the source of "metadata" for you -- is hard to parse correctly. Much harder and error-prone than parsing XML for RSS. Your solution serves only to push complexity downstream.
Providing RSS feeds is practically free everywhere. I wouldn't be surprised if many more resources are spent deciding to turn it off than feeds would consume for all eternity.
That is to say, what Firefox and Datastreamer are deciding about RSS appears to be unrelated. However, as a cocreator of RSS, you probably know that HTML -- which is the source of "metadata" for you -- is hard to parse correctly. Much harder and error-prone than parsing XML for RSS. Your solution serves only to push complexity downstream.
Providing RSS feeds is practically free everywhere. I wouldn't be surprised if many more resources are spent deciding to turn it off than feeds would consume for all eternity.