This is terrible! One of Firefox great features are the add-ons that change the _browser_ experience itself. I NEED TileTabs, ColorTabs, and a few others that

This is terrible! One of Firefox great features are the add-ons that change the _browser_ experience itself. I NEED TileTabs, ColorTabs, and a few others that would stop working after this change. Yes, I understand the ideology of browsers being invisible to the content, but what about our users? I don't think people understand that these add-ons are really productivity tools that aren't otherwise available.