We've heard that song and dance before. Firefox features always take the same path: start as regular part of the browser, then accessible through an extension,

We've heard that song and dance before. Firefox features always take the same path: start as regular part of the browser, then accessible through an extension, then you have to set an about:config flag for the extension to work, then you have to set a flag and modify some configuration files, and then you can go fuck yourself if you needed that.