This extension does exactly what I wanted it to do. When I now click on my RSS feed it opens up seamlessly just like it did in FF version 63.0, before Mozilla removed the built in RSS reader. I am very happy with this extension. It does not add a lot of bells and whistles that I do not need or want. Thank you very much Aurelien.

Work as expected. Thanks for this.

I've been looking for a replacement for the default RSS previewer since it was removed from Firefox. Most extensions require opening a sidebar or contain features I will never use.

The author states that "This extension attempts to recreate.." the original previewer. I'm happy to report that this extension is nearly indistinguishable from the original.

I would rate it more than 5 stars if I could.

If you are looking to replicate the default reader's preview functionality, this is the add-on you need.

Thank you to the author for making it!