Exatamente o que precisava! mostra o xml do RSS atom direto no browser, sem mudar url, sem criar lista de feed nem nada.
e não fica icones na barra de extensões também. muito bom!
Mozilla please review this extension to put this at recomended status. it works perfectly. :)

Works great.

Was missing Firefox's native ability to read RSS feeds. Thank you. 👏🏻

It restores the support for RSS and even more. Just perfect. It should be a recommended extension.

It works really *but* I think an alternative icon or simply changing the icon into one which doesn't have a box around it would make it fine more nicely with the other address bar icons.