feed preview seemed to break my browser since I have a ton of tabs open all the time. Not sure why the extension causes this, but just a head's up Firefox has

feed preview seemed to break my browser since I have a ton of tabs open all the time. Not sure why the extension causes this, but just a head's up Firefox has a really great json viewer that I prefer even over my IDE, but it's one weakness is it's lack of XML support which Chrome does have :/