Just went from FF 37.0.2 to FF 38.0.1 and now on the right side of the URL bar there is a little page icon which opens something called about:reader. All it does is give a very BIG page with big for for example Google but for most pages it just gives an error saying that the loading of the page has failed. Very mysterious.<br> I really don't know what this "reader" thing is, all I know it looks like just another totally useless (and this time very mysterious) feature they did add.<br> And it is not removable: when I use the normal way to adjust or remove icons and so on, the little page-icon can not be be or removed. Edit: just started FF in Safe Mode and then it's gone? Really don't know what it is then. It's something new today when I updated to FF 38.0.1. I have no add on installed for a reader or something like that. See screenshot for the icon.